91 results on '"Niemiec, Anna"'
Search Results
2. A complex node of the cosmic web associated with the massive galaxy cluster MACS J0600.1-2008
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Furtak, Lukas J., Zitrin, Adi, Richard, Johan P., Eckert, Dominique, Sayers, Jack, Ebeling, Harald, Fujimoto, Seiji, Laporte, Nicolas, Lagattuta, David, Limousin, Marceau, Mahler, Guillaume, Meena, Ashish K., Andrade-Santos, Felipe, Frye, Brenda L., Jauzac, Mathilde, Koekemoer, Anton M., Kohno, Kotaro, Espada, Daniel, Lu, Harry, Massey, Richard, and Niemiec, Anna
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
MACS J0600.1-2008 (MACS0600) is an X-ray luminous, massive galaxy cluster at $z_{\mathrm{d}}=0.43$, studied previously by the REionization LensIng Cluster Survey (RELICS) and ALMA Lensing Cluster Survey (ALCS) projects which revealed a complex, bimodal mass distribution and an intriguing high-redshift object behind it. Here, we report on the results of a combined analysis of the extended strong lensing (SL), X-ray, Sunyaev-Zeldovich (SZ), and galaxy luminosity-density properties of this system. Using new JWST and ground-based Gemini-N and Keck data, we obtain 13 new spectroscopic redshifts of multiply imaged galaxies and identify 12 new photometric multiple-image systems and candidates, including two multiply imaged $z\sim7$ objects. Taking advantage of the larger areal coverage, our analysis reveals an additional bimodal, massive SL structure which we measure spectroscopically to lie adjacent to the cluster and whose existence was implied by previous SL-modeling analyses. While based in part on photometric systems identified in ground-based imaging requiring further verification, our extended SL model suggests that the cluster may have the second-largest critical area and effective Einstein radius observed to date, $A_{\mathrm{crit}}\simeq2.16 \mathrm{arcmin}^2$ and $\theta_{\mathrm{E}}=49.7''\pm5.0''$ for a source at $z_{\mathrm{s}}=2$, enclosing a total mass of $M(<\theta_{\mathrm{E}})=(4.7\pm0.7)\times10^{14} \mathrm{M}_{\odot}$. These results are also supported by the galaxy luminosity distribution, the SZ and X-ray data. Yet another, probably related massive cluster structure, discovered in X-rays $5'$ (1.7 Mpc) further north, suggests that MACS0600 is part of an even larger filamentary structure. This discovery adds to several recent detections of massive structures around SL galaxy clusters and establishes MACS0600 as a prime target for future high-redshift surveys with JWST., Comment: Accepted for publication in MNRAS. Version updated to the accepted paper
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- 2024
3. Beyond the Ultra-deep Frontier Fields And Legacy Observations (BUFFALO): a high-resolution strong + weak-lensing view of Abell 370
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Niemiec, Anna, Jauzac, Mathilde, Eckert, Dominique, Lagattuta, David, Sharon, Keren, Koekemoer, Anton M., Umetsu, Keiichi, Acebron, Ana, Diego, Jose M., Harvey, David, Jullo, Eric, Kokorev, Vasily, Limousin, Marceau, Mahler, Guillaume, Natarajan, Priyamvada, Nonino, Mario, Remolina, Juan D., Steinhardt, Charles, Tam, Sut-Ieng, and Zitrin, Adi
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Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The HST treasury program BUFFALO provides extended wide-field imaging of the six Hubble Frontier Fields galaxy clusters. Here we present the combined strong and weak-lensing analysis of Abell 370, a massive cluster at z=0.375. From the reconstructed total projected mass distribution in the 6arcmin x 6arcmin BUFFALO field-of-view, we obtain the distribution of massive substructures outside the cluster core and report the presence of a total of seven candidates, each with mass $\sim 5 \times 10^{13}M_{\odot}$. Combining the total mass distribution derived from lensing with multi-wavelength data, we evaluate the physical significance of each candidate substructure, and conclude that 5 out of the 7 substructure candidates seem reliable, and that the mass distribution in Abell 370 is extended along the North-West and South-East directions. While this finding is in general agreement with previous studies, our detailed spatial reconstruction provides new insights into the complex mass distribution at large cluster-centric radius. We explore the impact of the extended mass reconstruction on the model of the cluster core and in particular, we attempt to physically explain the presence of an important external shear component, necessary to obtain a low root-mean-square separation between the model-predicted and observed positions of the multiple images in the cluster core. The substructures can only account for up to half the amplitude of the external shear, suggesting that more effort is needed to fully replace it by more physically motivated mass components. We provide public access to all the lensing data used as well as the different lens models., Comment: 29 pages, 17 figures, 3 tables
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- 2023
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4. BUFFALO/Flashlights: Constraints on the abundance of lensed supergiant stars in the Spock galaxy at redshift 1
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Diego, Jose M., Li, Sung Kei, Meena, Ashish K., Niemiec, Anna, Acebron, Ana, Jauzac, Mathilde, Struble, Mitchell F., Amruth, Alfred, Broadhurst, Tom J., Cerny, Catherine, Ebeling, Harald, Filippenko, Alexei V., Jullo, Eric, Kelly, Patrick, Koekemoer, Anton M., Lagatutta, David, Lim, Jeremy, Limousin, Marceau, Mahler, Guillaume, Patel, Nency, Remolina, Juan, Richard, Johan, Sharon, Keren, Steinhardt, Charles, Umetsu, Keichii, Williams, Liliya, Zitrin, Adi, Palencia, J. M., Ji, Liang Dai. Lingyuan, and Pascale, Massimo
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a constraint on the abundance of supergiant (SG) stars at redshift z approx. 1, based on recent observations of a strongly lensed arc at this redshift. First we derive a free-form model of MACS J0416.1-2403 using data from the BUFFALO program. The new lens model is based on 72 multiply lensed galaxies that produce 214 multiple images, making it the largest sample of spectroscopically confirmed lensed galaxies on this cluster. The larger coverage in BUFFALO allows us to measure the shear up to the outskirts of the cluster, and extend the range of lensing constraints up to ~ 1 Mpc from the central region, providing a mass estimate up to this radius. As an application, we make predictions for the number of high-redshift multiply-lensed galaxies detected in future observations with JWST. Then we focus on a previously known lensed galaxy at z=1.0054, nicknamed Spock, which contains four previously reported transients. We interpret these transients as microcaustic crossings of SG stars and compute the probability of such events. Based on simplifications regarding the stellar evolution, we find that microlensing (by stars in the intracluster medium) of SG stars at z=1.0054 can fully explain these events. The inferred abundance of SG stars is consistent with either (1) a number density of stars with bolometric luminosities beyond the Humphreys-Davidson (HD) limit (L ~ $6\times10^5 L_{\odot}$) that is below 400 stars per sq. kpc, or (2) the absence of stars beyond the HD limit but with a SG number density of ~ 9000 per sq. kpc for stars with luminosities between $10^5$ and $6\times10^5$. This is equivalent to one SG star per 10x10 pc$^2$. We finally make predictions for future observations with JWST's NIRcam. We find that in observations made with the F200W filter that reach 29 mag AB, if cool red SG stars exist at z~1 beyond the HD limit, they should be easily detected in this arc, Comment: 24 pages & 18 figures
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- 2023
5. Strong gravitational lensing's 'external shear' is not shear
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Etherington, Amy, Nightingale, James W., Massey, Richard, Tam, Sut-Ieng, Cao, XiaoYue, Niemiec, Anna, He, Qiuhan, Robertson, Andrew, Li, Ran, Amvrosiadis, Aristeidis, Cole, Shaun, Diego, Jose M., Frenk, Carlos S., Frye, Brenda L., Harvey, David, Jauzac, Mathilde, Koekemoer, Anton M., Lagattuta, David J., Limousin, Marceau, Mahler, Guillaume, Sirks, Ellen, and Steinhardt, Charles L.
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Astrophysics - Cosmology and Nongalactic Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
The distribution of mass in galaxy-scale strong gravitational lenses is often modelled as an elliptical power law plus 'external shear', which notionally accounts for neighbouring galaxies and cosmic shear. We show that it does not. Except in a handful of rare systems, the best-fit values of external shear do not correlate with independent measurements of shear: from weak lensing in 45 Hubble Space Telescope images, or in 50 mock images of lenses with complex distributions of mass. Instead, the best-fit shear is aligned with the major or minor axis of 88% of lens galaxies; and the amplitude of the external shear increases if that galaxy is disky. We conclude that 'external shear' attached to a power law model is not physically meaningful, but a fudge to compensate for lack of model complexity. Since it biases other model parameters that are interpreted as physically meaningful in several science analyses (e.g. measuring galaxy evolution, dark matter physics or cosmological parameters), we recommend that future studies of galaxy-scale strong lensing should employ more flexible mass models., Comment: 13 pages, 11 figures, submitted to MNRAS and Review Response Submitted
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- 2023
6. The impact of human expert visual inspection on the discovery of strong gravitational lenses
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Rojas, Karina, Collett, Thomas E., Ballard, Daniel, Magee, Mark R., Birrer, Simon, Buckley-Geer., Elizabeth, Chan, James H. H., Clément, Benjamin, Diego, José M., Gentile, Fabrizio, González, Jimena, Joseph, Rémy, Mastache, Jorge, Schuldt, Stefan, Tortora, Crescenzo, Verdugo, Tomás, Verma, Aprajita, Daylan, Tansu, Millon, Martin, Jackson, Neal, Dye, Simon, Melo, Alejandra, Mahler, Guillaume, Ogando, Ricardo L. C., Courbin, Frédéric, Fritz, Alexander, Herle, Aniruddh, Barroso, Javier A. Acevedo, Cañameras, Raoul, Cornen, Claude, Dhanasingham, Birendra, Glazebrook, Karl, Martinez, Michael N., Ryczanowski, Dan, Savary, Elodie, Góis-Silva, Filipe, Ureña-López, L. Arturo, Wiesner, Matthew P., Wilde, Joshua, Calçada, Gabriel Valim, Cabanac, Rémi, Pan, Yue, Sierra, Isaac, Despali, Giulia, Cavalcante-Gomes, Micaele V., Macmillan, Christine, Maresca, Jacob, Grudskaia, Aleksandra, O'Donnell, Jackson H., Paic, Eric, Niemiec, Anna, de la Bella, Lucia F., Bromley, Jane, Williams, Devon M., More, Anupreeta, and Levine, Benjamin C.
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We investigate the ability of human 'expert' classifiers to identify strong gravitational lens candidates in Dark Energy Survey like imaging. We recruited a total of 55 people that completed more than 25$\%$ of the project. During the classification task, we present to the participants 1489 images. The sample contains a variety of data including lens simulations, real lenses, non-lens examples, and unlabeled data. We find that experts are extremely good at finding bright, well-resolved Einstein rings, whilst arcs with $g$-band signal-to-noise less than $\sim$25 or Einstein radii less than $\sim$1.2 times the seeing are rarely recovered. Very few non-lenses are scored highly. There is substantial variation in the performance of individual classifiers, but they do not appear to depend on the classifier's experience, confidence or academic position. These variations can be mitigated with a team of 6 or more independent classifiers. Our results give confidence that humans are a reliable pruning step for lens candidates, providing pure and quantifiably complete samples for follow-up studies., Comment: 16 pages, 20 Figures
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- 2023
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7. Precision modeling of JWST's first cluster lens SMACSJ0723.3-7327
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Mahler, Guillaume, Jauzac, Mathilde, Richard, Johan, Beauchesne, Benjamin, Ebeling, Harald, Lagattuta, David, Natarajan, Priyamvada, Sharon, Keren, Atek, Hakim, Claeyssens, Adélaïde, Clément, Benjamin, Eckert, Dominique, Edge, Alastair, Kneib, Jean-Paul, and Niemiec, Anna
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Exploiting the fundamentally achromatic nature of gravitational lensing, we present a lens model for the massive galaxy cluster SMACSJ0723.3-7323 (SMACSJ0723, z=0.388) that significantly improves upon earlier work. Building on strong-lensing constraints identified in prior Hubble Space Telescope (HST) observations, the mass model utilizes 21 multiple-image systems, 17 of which were newly discovered in Early Release Observation (ERO) data from the James Webb Space Telescope (JWST). The resulting lens model maps the cluster mass distribution to an RMS spatial precision of 0.32'' and is publicly available. Consistent with previous analyses, our study shows SMACSJ0723.3-7323 to be well described by a single large-scale component centered on the location of the brightest cluster galaxy. However, satisfying all lensing constraints provided by the JWST data, the model point to the need for the inclusion of an additional, diffuse component west of the cluster. A comparison of the galaxy, mass, and gas distributions in the core of SMACSJ0723 based on HST, JWST, and Chandra data reveals a concentrated regular elliptical profile along with tell-tale signs of a recent merger, possibly proceeding almost along our line of sight. The exquisite sensitivity of JWST's NIRCAM reveals in spectacular fashion both the extended intra-cluster-light distribution and numerous star-forming clumps in magnified background galaxies. The high-precision lens model derived here for SMACSJ0723-7323 demonstrates the unprecedented power of combining HST and JWST data for studies of structure formation and evolution in the distant Universe., Comment: Updated to match the revised version submitted to ApJ - analysis, results and conclusions are unchanged. Link to the lensing outputs: https://github.com/guillaumemahler/SMACS0723-mahler2022
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- 2022
8. Scatter in the satellite galaxy SHMR: fitting functions, scaling relations & physical processes from the IllustrisTNG simulation
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Niemiec, Anna, Giocoli, Carlo, Cohen, Ethan, Jauzac, Mathilde, Jullo, Eric, and Limousin, Marceau
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Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The connection between galaxies and their dark matter haloes is often described with the Stellar-to-Halo Mass relation (SHMR). Satellite galaxies in clusters have been shown to follow a SHMR distinct from central galaxies because of the environmental processes that they are subject to. In addition, the variety of accretion histories leads to an important scatter in this relation, even more for satellites than for central galaxies. In this work, we use the hydrodynamical simulation IllustrisTNG to study the scatter in the satellite galaxy SHMR, and extract the parameters that can best allow to understand it. Active galaxies, that represent a very small fraction of cluster galaxies, follow a very different relation than their passive counterparts, mainly because they were accreted much more recently. For this latter population, we find that the distance to the cluster centre is a good predictor of variations in the SHMR, but some information on the galaxy orbital history, such as the distance of closest approach to the host centre, is an even better one, although it is in practice more difficult to measure. In addition, we found that galaxy compactness is also correlated with the SHMR, while the host cluster properties (mass and concentration, formation redshift, mass and size of BCG) do not play a significant role. We provide accurate fitting functions and scaling relations to the scientific community, useful to predict the subhalo mass given a set of observable parameters. Finally, we connect the scatter in the SHMR to the physical processes affecting galaxies in clusters, and how they impact the different satellite sub-populations., Comment: 17 pages, 8 figures. Accepted in MNRAS
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- 2022
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9. Further support for a trio of mass-to-light deviations in Abell 370: free-form Grale lens inversion using BUFFALO strong lensing data
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Ghosh, Agniva, Williams, Liliya L. R., Liesenborgs, Jori, Acebron, Ana, Jauzac, Mathilde, Koekemoer, Anton M., Mahler, Guillaume, Niemiec, Anna, Steinhardt, Charles, Faisst, Andreas L., Lagattuta, David, and Natarajan, Priyamvada
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Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We use the Beyond Ultra-deep Frontier Fields and Legacy Observations (BUFFALO) strong lensing image catalog of the merging galaxy cluster Abell 370 to obtain a mass model using the free-form lens inversion algorithm GRALE. The improvement of the strong lensing data quality results in a lens plane rms of only 0.45 arcsec, about a factor of two lower than that of our existing HFF v4 reconstruction. We attribute the improvement to spectroscopic data and use of the full reprocessed HST mosaics. In our reconstructed mass model, we found indications of three distinct mass features in Abell 370: (i) a $\sim 35$ kpc offset between the northern BCG and the nearest mass peak, (ii) a $\sim 100$ kpc mass concentration of roughly critical density $\sim 250$ kpc east of the main cluster, and (iii) a probable filament-like structure passing N-S through the cluster. While (i) is present in some form in most publicly available reconstructions spanning the range of modeling techniques: parametric, hybrid, and free-form, (ii) and (iii) are recovered by only about half of the reconstructions. We tested our hypothesis on the presence of the filament-like structure by creating a synthetic cluster - Irtysh IIIc - mocking the situation of a cluster with external mass. We also computed the source plane magnification distributions. Using them we estimated the probabilities of magnifications in the source plane, and scrutinized their redshift dependence. Finally, we explored the lensing effects of Abell 370 on the luminosity functions of sources at $z_s=9.0$, finding it consistent with published results., Comment: 16 pages, 13 figures
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- 2021
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10. hybrid-Lenstool: A self-consistent algorithm to model galaxy clusters with strong- and weak-lensing simultaneously
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Niemiec, Anna, Jauzac, Mathilde, Jullo, Eric, Limousin, Marceau, Sharon, Keren, Kneib, Jean-Paul, Natarajan, Priyamvada, and Richard, Johan
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Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a new galaxy cluster lens modeling approach, hybrid-Lenstool, that is implemented in the publicly available modeling software Lenstool. hybrid-Lenstool combines a parametric approach to model the core of the cluster, and a non-parametric (free-form) approach to model the outskirts. hybrid-Lenstool optimizes both strong- and weak-lensing constraints simultaneously (Joint-Fit), providing a self-consistent reconstruction of the cluster mass distribution on all scales. In order to demonstrate the capabilities of the new algorithm, we tested it on a simulated cluster. hybrid-Lenstool yields more accurate reconstructed mass distributions than the former Sequential-Fit approach where the parametric and the non-parametric models are optimized successively. Indeed, we show with the simulated cluster that the mass density profile reconstructed with a Sequential-Fit deviates form the input by $2-3\sigma$ at all scales while the Joint-Fit gives a profile that is within $1-1.5\sigma$ of the true value. This gain in accuracy is consequential for recovering mass distributions exploiting cluster lensing and therefore for all applications of clusters as cosmological probes. Finally we found that the Joint-Fit approach yields shallower slope of the inner density profile than the Sequential-Fit approach, thus revealing possible biases in previous lensing studies., Comment: 11 pages, 4 figures, 1 table
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- 2020
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11. The BUFFALO HST Survey
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Steinhardt, Charles L., Jauzac, Mathilde, Acebron, Ana, Atek, Hakim, Capak, Peter, Davidzon, Iary, Eckert, Dominique, Harvey, David, Koekemoer, Anton M., Lagos, Claudia D. P., Mahler, Guillaume, Montes, Mireia, Niemiec, Anna, Nonino, Mario, Oesch, P. A., Richard, Johan, Rodney, Steven A., Schaller, Matthieu, Sharon, Keren, Strolger, Louis-Gregory, Allingham, Joseph, Amara, Adam, Bah'e, Yannick, Boehm, Celine, Bose, Sownak, Bouwens, Rychard J., Bradley, Larry D., Brammer, Gabriel, Broadhurst, Tom, Canas, Rodrigo, Cen, Renyue, Clement, Benjamin, Clowe, Douglas, Coe, Dan, Connor, Thomas, Darvish, Behnam, Diego, Jose M., Ebeling, Harald, Edge, A. C., Egami, Eiichi, Ettori, Stefano, Faisst, Andreas L., Frye, Brenda, Furtak, Lukas J., Gomez-Guijarro, C., Gonzalez, J. D. Remolina, Gonzalez, Anthony, Graur, Or, Gruen, Daniel, Hensley, Hagan, Hovis-Afflerbach, Beryl, Jablonka, Pascale, Jha, Saurabh W., Jullo, Eric, Kneib, Jean-Paul, Kokorev, Vasily, Lagattuta, David J., Limousin, Marceau, von der Linden, Anja, Linzer, Nora B., Lopez, Adrian, Magdis, Georgios E., Massey, Richard, Masters, Daniel C., Maturi, Matteo, McCully, Curtis, McGee, Sean L., Meneghetti, Massimo, Mobasher, Bahram, Moustakas, Leonidas A., Murphy, Eric J., Natarajan, Priyamvada, Neyrinck, Mark, O'Connor, Kyle, Oguri, Masamune, Pagul, Amanda, Rhodes, Jason, Rich, R. Michael, Robertson, Andrew, Sereno, Mauro, Shan, Huanyuan, Smith, Graham P., Sneppen, Albert, Squires, Gordon K., Tam, Sut-Ieng, Tchernin, Celine, Toft, Sune, Umetsu, Keiichi, Weaver, John R., van Weeren, R. J., Williams, Liliya L. R., Wilson, Tom J., Yan, Lin, and Zitrin, Adi
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Astrophysics - Astrophysics of Galaxies - Abstract
The Beyond Ultra-deep Frontier Fields and Legacy Observations (BUFFALO) is a 101 orbit + 101 parallel Cycle 25 Hubble Space Telescope Treasury program taking data from 2018-2020. BUFFALO will expand existing coverage of the Hubble Frontier Fields (HFF) in WFC3/IR F105W, F125W, and F160W and ACS/WFC F606W and F814W around each of the six HFF clusters and flanking fields. This additional area has not been observed by HST but is already covered by deep multi-wavelength datasets, including Spitzer and Chandra. As with the original HFF program, BUFFALO is designed to take advantage of gravitational lensing from massive clusters to simultaneously find high-redshift galaxies which would otherwise lie below HST detection limits and model foreground clusters to study properties of dark matter and galaxy assembly. The expanded area will provide a first opportunity to study both cosmic variance at high redshift and galaxy assembly in the outskirts of the large HFF clusters. Five additional orbits are reserved for transient followup. BUFFALO data including mosaics, value-added catalogs and cluster mass distribution models will be released via MAST on a regular basis, as the observations and analysis are completed for the six individual clusters., Comment: Accepted ApJS; MAST archive will be live concurrent with publication
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- 2020
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12. Setting the scene for BUFFALO: A study of the matter distribution in the HFF galaxy cluster MACS J0416.1-2403 and its parallel field
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Gonzalez, Elizabeth J., Chalela, Martín, Jauzac, Mathilde, Eckert, Dominique, Schaller, Matthieu, Harvey, David, Niemiec, Anna, Koekemoer, Anton M., Barnes, David, Clowe, Doug, Connor, Thomas, Diego, José M., Gonzalez, Juan D. Remolina, and Steinhardt, Charles L.
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
In the context of the BUFFALO (Beyond Ultra-deep Frontier Fields And Legacy Observations) survey, we present a new analysis of the merging galaxy cluster MACS\,J0416.1-2403 ($z = 0.397$) and its parallel field using the data collected by the Hubble Frontier Fields (HFF) campaign. In this work, we measure the surface mass density from a weak-lensing analysis, and characterise the overall matter distribution in both the cluster and parallel fields. The surface mass distribution derived for the parallel field shows clumpy overdensities connected by filament-like structures elongated in the direction of the cluster core. We also characterise the X-ray emission of the cluster, and compare it with the lensing mass distribution. We identify five substructures at the $>5\sigma$ level over the two fields, four of them being in the cluster one. Furthermore, three of them are located close to the edges of the field of view, and border issues can significantly hamper the determination of their physical parameters. Finally, we compare our results with the predicted subhalo distribution of one of the Hydrangea/C-EAGLE simulated cluster. Significant differences are obtained suggesting the simulated cluster is at a more advanced evolutionary state than MACS\,J0416.1-2403. Our results anticipate the upcoming BUFFALO observations that will link the two HFF fields, extending further the \emph{HST} coverage, and thus allowing a better characterisation of the reported substructures., Comment: 15 pages, 8 figures, 3 tables, submitted to MNRAS
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- 2019
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13. Strong gravitational lensing’s ‘external shear’ is not shear
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Etherington, Amy, primary, Nightingale, James W, additional, Massey, Richard, additional, Tam, Sut-Ieng, additional, Cao, XiaoYue, additional, Niemiec, Anna, additional, He, Qiuhan, additional, Robertson, Andrew, additional, Li, Ran, additional, Amvrosiadis, Aristeidis, additional, Cole, Shaun, additional, Diego, Jose M, additional, Frenk, Carlos S, additional, Frye, Brenda L, additional, Harvey, David, additional, Jauzac, Mathilde, additional, Koekemoer, Anton M, additional, Lagattuta, David J, additional, Lange, Samuel, additional, Limousin, Marceau, additional, Mahler, Guillaume, additional, Sirks, Ellen, additional, and Steinhardt, Charles L, additional
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- 2024
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14. Dark matter stripping in galaxy clusters: a look at the Stellar to Halo Mass relation in the Illustris simulation
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Niemiec, Anna, Jullo, Eric, Giocoli, Carlo, Limousin, Marceau, and Jauzac, Mathilde
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Satellite galaxies in galaxy clusters represent a significant fraction of the global galaxy population. Because of the unusual dense environment of clusters, their evolution is driven by different mechanisms than the ones affecting field or central galaxies. Understanding the different interactions they are subject to, and how they are influenced by them, is therefore an important step towards explaining the global picture of galaxy evolution. In this paper, we use the publicly-available high resolution hydrodynamical simulation Illustris-1 to study satellite galaxies in the three most massive host haloes (with masses $M_{200} > 10^{14}\,h^{-1}\rm{M}_{\odot}$) at $z=0$. We measure the Stellar-to-Halo Mass Relation (hereafter SHMR) of the galaxies, and find that for satellites it is shifted towards lower halo masses compared to the SHMR of central galaxies. We provide simple fitting functions for both the central and satellite SHMR. To explain the shift between the two, we follow the satellite galaxies since their time of accretion into the clusters, and quantify the impact of dark matter stripping and star formation. We find that subhaloes start losing their dark matter as soon as they get closer than $\sim 1.5\times R_{\rm{vir}}$ to the centre of their host, and that up to 80\% of their dark matter content gets stripped during infall. On the other hand, star formation quenching appears to be delayed, and galaxies continue to form stars for a few Gyr after accretion. The combination of these two effects impacts the ratio of stellar to dark matter mass which varies drastically during infall, from 0.03 to 0.3., Comment: 14 pages, 12 figures
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- 2018
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15. Observational evidence of galaxy assembly bias
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Montero-Dorta, Antonio D., Perez, Enrique, Prada, Francisco, Rodriguez-Torres, Sergio, Favole, Ginevra, Klypin, Anatoly, Fernandes, Roberto Cid, Gonzalez-Delgado, Rosa, Dominguez, Alberto, Bolton, Adam S., Garcia-Benito, Ruben, Jullo, Eric, and Niemiec, Anna
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Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We analyze the spectra of 300,000 luminous red galaxies (LRGs) with stellar masses $M_* \gtrsim 10^{11} M_{\odot}$ from the SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS). By studying their star-formation histories, we find two main evolutionary paths converging into the same quiescent galaxy population at $z\sim0.55$. Fast-growing LRGs assemble $80\%$ of their stellar mass very early on ($z\sim5$), whereas slow-growing LRGs reach the same evolutionary state at $z\sim1.5$. Further investigation reveals that their clustering properties on scales of $\sim$1-30 Mpc are, at a high level of significance, also different. Fast-growing LRGs are found to be more strongly clustered and reside in overall denser large-scale structure environments than slow-growing systems, for a given stellar-mass threshold. Our results imply a dependence of clustering on stellar-mass assembly history (naturally connected to the mass-formation history of the corresponding halos) for a homogeneous population of similar mass and color, which constitutes a strong observational evidence of galaxy assembly bias., Comment: 6 pages, 5 figures. Submitted to ApJ Letters
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- 2017
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16. Stellar-to-halo mass relation of cluster galaxies
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Niemiec, Anna, Jullo, Eric, Limousin, Marceau, Giocoli, Carlo, Erben, Thomas, Hildebrant, Hendrik, Kneib, Jean-Paul, Leauthaud, Alexie, Makler, Martin, Moraes, Bruno, Pereira, Maria E. S., Shan, Huanyuan, Rozo, Eduardo, Rykoff, Eli, and Van Waerbeke, Ludovic
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Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
In the hierarchical formation model, galaxy clusters grow by accretion of smaller groups or isolated galaxies. During the infall into the centre of a cluster, the properties of accreted galaxies change. In particular, both observations and numerical simulations suggest that its dark matter halo is stripped by the tidal forces of the host. We use galaxy-galaxy weak lensing to measure the average mass of dark matter haloes of satellite galaxies as a function of projected distance to the centre of the host, for different stellar mass bins. Assuming that the stellar component of the galaxy is less disrupted by tidal stripping, stellar mass can be used as a proxy of the infall mass. We study the stellar to halo mass relation of satellites as a function of the cluster-centric distance to measure tidal stripping. We use the shear catalogues of the DES science verification archive, the CFHTLenS and the CFHT Stripe 82 (CS82) surveys, and we select satellites from the redMaPPer catalogue of clusters. For galaxies located in the outskirts of clusters, we find a stellar to halo mass relation in good agreement with the theoretical expectations from \citet{moster2013} for central galaxies. In the centre of the cluster, we find that this relation is shifted to smaller halo mass for a given stellar mass. We interpret this finding as further evidence for tidal stripping of dark matter haloes in high density environments., Comment: 15 pages, 14 figures
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- 2017
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17. Clustering properties of g-selected galaxies at z ∼ 0.8
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Favole, Ginevra, Comparat, Johan, Prada, Francisco, Yepes, Gustavo, Jullo, Eric, Niemiec, Anna, Kneib, Jean-Paul, Rodríguez-Torres, Sergio A, Klypin, Anatoly, Skibba, Ramin A, McBride, Cameron K, Eisenstein, Daniel J, Schlegel, David J, Nuza, Sebastián E, Chuang, Chia-Hsun, Delubac, Timothée, Yèche, Christophe, and Schneider, Donald P
- Subjects
galaxies: distances and redshifts ,galaxies: haloes ,galaxies: statistics ,cosmology: observations ,cosmology: theory ,large-scale structure of Universe ,Astronomical and Space Sciences ,Astronomy & Astrophysics - Abstract
Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELGs) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range 0.6 < z < 1.7. With current data, we explore the halo-galaxy connection by measuring three clustering properties of g-selected ELGs as matter tracers in the redshift range 0.6 < z < 1: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them on to the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub)Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at z ~ 0.8 live in haloes of (1 ± 0.5) × 1012 h-1M⊙ and 22.5 ± 2.5 per cent of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio.
- Published
- 2016
18. Clustering properties of $g$-selected galaxies at $z\sim0.8$
- Author
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Favole, Ginevra, Comparat, Johan, Prada, Francisco, Yepes, Gustavo, Jullo, Eric, Niemiec, Anna, Kneib, Jean-Paul, Rodríguez-Torres, Sergio A., Klypin, Anatoly, Skibba, Ramin A., McBride, Cameron K., Eisenstein, Daniel J., Schlegel, David J., Nuza, Sebastián E., Chuang, Chia-Hsun, Delubac, Timothée, Yèche, Christophe, and Schneider, Donald P.
- Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics ,Astrophysics - Astrophysics of Galaxies ,85A05, 85A40 - Abstract
Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELG) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range $0.6 < z < 1.7$. With current data, we explore the halo-galaxy connection by measuring three clustering properties of $g$-selected ELGs as matter tracers in the redshift range $0.6 < z < 1$: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them onto the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub)Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at $z\sim0.8$ live in halos of $(1\pm 0.5)\times10^{12}\,h^{-1}$M$_{\odot}$ and 22.5$\pm2.5$% of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio., Comment: 11 pages, 7 figures, 2 tables
- Published
- 2015
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19. BUFFALO/Flashlights: Constraints on the abundance of lensed supergiant stars in the Spock galaxy at redshift 1
- Author
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Jose Diego, M., primary, Kei Li, Sung, additional, Ashish Meena, K., additional, Niemiec, Anna, additional, Acebron, Ana, additional, Jauzac, Mathilde, additional, Mitchell Struble, F., additional, Amruth, Alfred, additional, Tom Broadhurst, J., additional, Cerny, Catherine, additional, Ebeling, Harald, additional, Alexei Filippenko, V., additional, Jullo, Eric, additional, Kelly, Patrick, additional, Anton Koekemoer, M., additional, Lagattuta, David, additional, Lim, Jeremy, additional, Limousin, Marceau, additional, Mahler, Guillaume, additional, Patel, Nency, additional, Remolina, Juan, additional, Richard, Johan, additional, Sharon, Keren, additional, Steinhardt, Charles, additional, Umetsu, Keiichi, additional, Williams, Liliya, additional, Zitrin, Adi, additional, Palencia, J.M., additional, Dai, Liang, additional, Ji, Lingyuan, additional, and Pascale, Massimo, additional
- Published
- 2023
- Full Text
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20. Extending the Planetary Mass Function to Earth Mass by Microlensing at Moderately High Magnification
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Abe, Fumio, Airey, Charlotte, Barnard, Ellen, Baudrey, Julie, Botzler, Christine, Douchin, Dimitri, Freeman, Matthew, Larsen, Patricia, Niemiec, Anna, Perrott, Yvette, Philpott, Lydia, Rattenbury, Nicholas, and Yock, Philip
- Subjects
Astrophysics - Earth and Planetary Astrophysics - Abstract
A measurement by microlensing of the planetary mass function of planets with masses ranging from 5M_E to 10M_J and orbital radii from 0.5 to 10 AU was reported recently. A strategy for extending the mass range down to (1-3)M_E is proposed here. This entails monitoring the peaks of a few tens of microlensing events with moderately high magnifications with 1-2m class telescopes. Planets of a few Earth masses are found to produce deviations of ~ 5% to the peaks of microlensing light curves with durations ~ (0.7-3)hr in events with magnification ~ 100 if the projected separation of the planet lies in the annular region (0.85-1.2)r_E. Similar deviations are produced by Earth mass planets in the annular region (0.95-1.05)r_E. It is possible that sub-Earths could be detected very close to the Einstein ring if they are sufficiently abundant, and also planetary systems with more than one low mass planet., Comment: 12 pages, 20 figures (in press) MNRAS (2013)
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- 2013
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21. The impact of human expert visual inspection on the discovery of strong gravitational lenses
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Rojas, Karina, primary, Collett, Thomas E, additional, Ballard, Daniel, additional, Magee, Mark R, additional, Birrer, Simon, additional, Buckley-Geer, Elizabeth, additional, Chan, James H H, additional, Clément, Benjamin, additional, Diego, José M, additional, Gentile, Fabrizio, additional, González, Jimena, additional, Joseph, Rémy, additional, Mastache, Jorge, additional, Schuldt, Stefan, additional, Tortora, Crescenzo, additional, Verdugo, Tomás, additional, Verma, Aprajita, additional, Daylan, Tansu, additional, Millon, Martin, additional, Jackson, Neal, additional, Dye, Simon, additional, Melo, Alejandra, additional, Mahler, Guillaume, additional, Ogando, Ricardo L C, additional, Courbin, Frédéric, additional, Fritz, Alexander, additional, Herle, Aniruddh, additional, Acevedo Barroso, Javier A, additional, Cañameras, Raoul, additional, Cornen, Claude, additional, Dhanasingham, Birendra, additional, Glazebrook, Karl, additional, Martinez, Michael N, additional, Ryczanowski, Dan, additional, Savary, Elodie, additional, Góis-Silva, Filipe, additional, Arturo Ureña-López, L, additional, Wiesner, Matthew P, additional, Wilde, Joshua, additional, Valim Calçada, Gabriel, additional, Cabanac, Rémi, additional, Pan, Yue, additional, Sierra, Isaac, additional, Despali, Giulia, additional, Cavalcante-Gomes, Micaele V, additional, Macmillan, Christine, additional, Maresca, Jacob, additional, Grudskaia, Aleksandra, additional, O’Donnell, Jackson H, additional, Paic, Eric, additional, Niemiec, Anna, additional, de la Bella, Lucia F, additional, Bromley, Jane, additional, Williams, Devon M, additional, More, Anupreeta, additional, and Levine., Benjamin C, additional
- Published
- 2023
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22. Precision Modeling of JWST's First Cluster Lens SMACS J0723.3–7327*
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Mahler, Guillaume, primary, Jauzac, Mathilde, additional, Richard, Johan, additional, Beauchesne, Benjamin, additional, Ebeling, Harald, additional, Lagattuta, David, additional, Natarajan, Priyamvada, additional, Sharon, Keren, additional, Atek, Hakim, additional, Claeyssens, Adélaïde, additional, Clément, Benjamin, additional, Eckert, Dominique, additional, Edge, Alastair, additional, Kneib, Jean-Paul, additional, and Niemiec, Anna, additional
- Published
- 2023
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23. BUFFALO/Flashlights: Constraints on the abundance of lensed supergiant stars in the Spock galaxy at redshift 1
- Author
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Diego, Jose M, Li, Sung Kei, Meena, Ashish K, Niemiec, Anna, Acebron, Ana, Jauzac, Mathilde, Struble, Mitchell F, Amruth, Alfred, Broadhurst, Tom J, Cerny, Catherine, Ebeling, Harald, Filippenko, Alexei V, Jullo, Eric, Kelly, Patrick, Koekemoer, Anton M, Lagatutta, David, Lim, Jeremy, Limousin, Marceau, Mahler, Guillaume, Patel, Nency, Remolina, Juan, Richard, Johan, Sharon, Keren, Steinhardt, Charles, Umetsu, Keichii, Williams, Liliya, Zitrin, Adi, Palencia, J.M, Dai, Liang, Ji, Lingyuan, Pascale, Massimo, Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Astrophysics of Galaxies (astro-ph.GA) ,FOS: Physical sciences ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Astrophysics of Galaxies ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a constraint on the abundance of supergiant (SG) stars at redshift z approx. 1, based on recent observations of a strongly lensed arc at this redshift. First we derive a free-form model of MACS J0416.1-2403 using data from the BUFFALO program. The new lens model is based on 72 multiply lensed galaxies that produce 214 multiple images, making it the largest sample of spectroscopically confirmed lensed galaxies on this cluster. The larger coverage in BUFFALO allows us to measure the shear up to the outskirts of the cluster, and extend the range of lensing constraints up to ~ 1 Mpc from the central region, providing a mass estimate up to this radius. As an application, we make predictions for the number of high-redshift multiply-lensed galaxies detected in future observations with JWST. Then we focus on a previously known lensed galaxy at z=1.0054, nicknamed Spock, which contains four previously reported transients. We interpret these transients as microcaustic crossings of SG stars and compute the probability of such events. Based on simplifications regarding the stellar evolution, we find that microlensing (by stars in the intracluster medium) of SG stars at z=1.0054 can fully explain these events. The inferred abundance of SG stars is consistent with either (1) a number density of stars with bolometric luminosities beyond the Humphreys-Davidson (HD) limit (L ~ $6\times10^5 L_{\odot}$) that is below 400 stars per sq. kpc, or (2) the absence of stars beyond the HD limit but with a SG number density of ~ 9000 per sq. kpc for stars with luminosities between $10^5$ and $6\times10^5$. This is equivalent to one SG star per 10x10 pc$^2$. We finally make predictions for future observations with JWST's NIRcam. We find that in observations made with the F200W filter that reach 29 mag AB, if cool red SG stars exist at z~1 beyond the HD limit, they should be easily detected in this arc, 24 pages & 18 figures
- Published
- 2023
24. Pilot-WINGS: An extended MUSE view of the structure of Abell 370
- Author
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Lagattuta, David J, primary, Richard, Johan, additional, Bauer, Franz Erik, additional, Cerny, Catherine, additional, Claeyssens, Adélaïde, additional, Guaita, Lucia, additional, Jauzac, Mathilde, additional, Jeanneau, Alexandre, additional, Koekemoer, Anton M, additional, Mahler, Guillaume, additional, Prieto Lyon, Gonzalo, additional, Acebron, Ana, additional, Meneghetti, Massimo, additional, Niemiec, Anna, additional, Zitrin, Adi, additional, Bianconi, Matteo, additional, Connor, Thomas, additional, Cen, Renyue, additional, Edge, Alastair, additional, Faisst, Andreas L, additional, Limousin, Marceau, additional, Massey, Richard, additional, Sereno, Mauro, additional, Sharon, Keren, additional, and Weaver, John R, additional
- Published
- 2022
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- View/download PDF
25. Local Government in the Process of Transformation
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Gąsior-Niemiec, Anna, Blokker, Paul, editor, and Dallago, Bruno, editor
- Published
- 2009
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26. Scatter in the satellite galaxy SHMR: fitting functions, scaling relations, and physical processes from the IllustrisTNG simulation
- Author
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Niemiec, Anna, primary, Giocoli, Carlo, additional, Cohen, Ethan, additional, Jauzac, Mathilde, additional, Jullo, Eric, additional, and Limousin, Marceau, additional
- Published
- 2022
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27. Civil Society and New Modes of Governance in Poland
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GĄSIOR-NIEMIEC, ANNA
- Published
- 2007
28. Propriedades de soluções de copolimeros estatisticos em comparação com copolimeros em bloco
- Author
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Niemiec, Anna Barbara, Loh, Watson, 1965, Silva, Luis Henrique Mendes da, Filho, Pedro de Alcantara Pessoa, Fujiwara, Fred Yukio, Longo, Cláudia, Universidade Estadual de Campinas. Instituto de Química, Programa de Pós-Graduação em Ciências, and UNIVERSIDADE ESTADUAL DE CAMPINAS
- Subjects
Surfatantes ,Calorimetria ,Surfactants ,Calorimetry ,Block copolymers ,Copolímeros em bloco - Abstract
Orientador: Watson Loh Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Quimica Resumo: O tema desta tese como sugerido pelo titulo aborda assuntos correlacionados com formação de sistemas binários de copolímeros em diferentes solventes como também com a interação entre copolímeros bloco e estatísticos de oxido de poli etileno e oxido de poli propileno com vários tipos de surfatantes iônicos: catiônicos, aniônicos e não iônicos. Os estudos deste trabalho foram divididos em três etapas, que foram concluídas com duas publicações e um manuscrito. Em primeiro artigo incluiu se todas as investigações correspondentes aos estudos de interação entre copolímeros em bloco P123 e surfatante não iônico C12EO6 monitorada por calorimetria e espalhamento de luz. Através deste estudo o novo fenômeno para sistema de P123 - C12EO6 foi observado, chamado de transição esferas-bastonetes e identificou-se alta aplicação de técnicas calorimétricas para monitoramento deste tipo de eventos intermoleculares. Este estudo foi executado em colaboração com o grupo de pesquisa da Universidade Lund na Suécia, que conduziu todos os experimentos que envolvem o espalhamento de luz. Por outro lado os experimentos na parte de calorimetria foram feitos dentro do nosso grupo. O segundo artigo descreve sistemas de copolímeros em bloco vs. estatísticos na interação com surfatantes iônicos: aniônicos, catiônicos. Estes estudos revelaram que copolímeros estatísticos interagem com copolímeros aniônicos da maneira parecida com que homopolímeros hidrofílicos. Efeito de temperatura foi investigado também através das técnicas calorimétricas e tendências previamente relatadas foram confirmadas. Como parte complementar a este artigo foram incluídos nesta tese alguns resultados calorimétricos da interação entre copolímeros estatísticos na região do ponto de turvação deles e surfatantes não iônicos, confirmando mais uma vez o que é conhecido da literatura que os surfatantes não-iônicos geralmente não interagem associativamente com polímeros não-iônicos e esta interação é especial para sistema P123 - C12EO6. Por último inclui se neste trabalho o manuscrito que contem um estudo comparativo de sistemas bifásicos de copolímeros em bloco vs. estatísticos. Verificou se neste estudo que os copolímeros estatísticos apresentam diferente comportamento na separação de fases, do que copolímeros em bloco. Devido a falta de auto - agregação destes copolímeros os pontos de turvação deles são menos elevados em comparação com copolímeros em bloco o que devido a esta propriedade tem enorme aplicação na área acadêmica em bioquímica e biotecnologia para purificação de materiais biológicos como também em outras áreas: analise de poluentes, compostos orgânicos,metais Abstract: The subject of the thesis, as suggested by the title, draws on the formation of binary systems of copolymers in different solvents, as well as interaction of block and random copolymers of poly (ethylene oxide) and poly (propylene oxide) with various types of ionic surfactants: cationic, anionic and non-ionic. These studies are divided in three stages and each of it was concluded with publication or manuscript. In the first article it is included all investigation on interaction between block copolymer P123 and noni-onic surfactant C12EO6 monitored by calorimetry and light scattering. By applying these techniques a new phenomenon was observed in the P123-C12EO6 system, namely a well-defined sphere-to-rod transition of the mixed micelles and interesting application of calorimetric techniques has been identified due to its high sensitivity to this kind of intermolecular events detection. These studies were performed in collaboration with our partners from Lund University, Sweden, who conducted light scattering measurements. On the other hand, measurements on calorimetry have been done within our research group. Moreover, in the second paper interactions between random vs. block copolymers with ionic surfactants (cationic and anionic) has been discussed. These studies revealed an interaction similar to that observed with other hydrophilic homopolymers. Effects of temperature and of the nature of the ionic surfactants on their interaction with these copolymers were found to agree with the previously reported trends. As a complementary part of this article some additional results on interaction between random copolymer and non-ionic surfactants have been included in this thesis. Once again it was confirmed what is reported in the literature that non-ionic surfactants generally do not interact associatively with non-ionic polymers and interaction between P123 and C12EO6 is special to this system. As the last, it was included in this work the manuscript, which contains the comparative studies of biphasic systems constructed from block vs. random copolymers. It was verified in this studies that random copolymers present different phase behaviour than block copolymers. Lack of auto-association of these copolymers promotes their cloud points to be lower then cloud points of block copolymers. Due to this property these copolymers has enormous application in academic area in biochemistry or biotechnology for purification of biological materials as well as in other areas: for pollutants analysis, organic materials or metals Doutorado Físico-Química Doutor em Ciências
- Published
- 2021
29. Traces of Europeanization: Poland
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GĄSIOR-NIEMIEC, ANNA
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- 2003
30. Heterotopias: The Clash of Scopic Regimes in Warsaw
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GĄSIOR-NIEMIEC, ANNA
- Published
- 2002
31. Erratum: Further support for a trio of mass-to-light deviations in Abell 370: free-form grale lens inversion using BUFFALO strong lensing data
- Author
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Ghosh, Agniva, primary, Williams, Liliya L R, additional, Liesenborgs, Jori, additional, Acebron, Ana, additional, Jauzac, Mathilde, additional, Koekemoer, Anton M, additional, Mahler, Guillaume, additional, Niemiec, Anna, additional, Steinhardt, Charles, additional, Faisst, Andreas L, additional, Lagattuta, David, additional, and Natarajan, Priyamvada, additional
- Published
- 2021
- Full Text
- View/download PDF
32. Further support for a trio of mass-to-light deviations in Abell 370: free-form grale lens inversion using BUFFALO strong lensing data (vol 506, pg 6144, 2021)
- Author
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Ghosh, Agniva, Williams, Liliya L. R., LIESENBORGS, Jori, Acebron, Ana, Jauzac, Mathilde, Koekemoer, Anton M., Mahler, Guillaume, Niemiec, Anna, Steinhardt, Charles, Faisst, Andreas L., Lagattuta, David, and Natarajan, Priyamvada
- Subjects
errata, addenda ,gravitational lensing: strong ,galaxies: clusters ,individual: Abell 370 - Abstract
The manuscript titled 'Further support for a trio of mass-to-light deviations in Abell 370: free-form GRALE lens inversion using BUFFALO strong lensing data', accepted in MNRAS on April 23, 2021 (doi:stab1196) has been submitted by the author as a replacement for the originally published version of the same manuscript. The authors made changes in the text of the manuscript based on the comments received from their BUFFALO collaboration members. Below are the amendments that have been embedded in the new version: (i) In the abstract, the line 'Since the number of images is nearly the same in both, we attribute the improvement to the improvement in the data quality.' to 'We attribute the improvement to spectroscopic data and use of the full reprocessed HST mosaics' was paraphrased. The new text summarizes the related information in a clearer way. (ii) In the introduction, additional references were added. (iii) Towards the end of the introduction, in the second last paragraph, the text: 'The main motivation behind this work is to present a comprehensive analysis of the cluster A370 using our free-form lens inversion method GRALE and utilizing the new strong lensing data from the BUFFALO collaboration, for the first time.' was added to clarify the motivation of the article. (iv) At the end of section 2.1 the authors added additional information about the reconstruction method: 'In this work we used single lens plane inversion with GRALE. The current stable version of GRALE is not capable of doing multi-lens plane reconstructions.' to help the reader understand the study better. (v) In section 2.2, the wording of the bulleted list was paraphrased in order to make the text clearer. No additional information was added. (vi) At the start of section 3.1, the authors added the following information about the reconstruction method to help the reader un-(LLRW) derstand the study better: 'In this work, we are using a reconstruction area of 0.927 Mpc by 0.927 Mpc and the smallest resolution cell (projected Plummer sphere) is about 12.5 kpc.' (vii) In table 2, information about the LENSTOOL reconstruction done by Richard et al. (2014) with the HFFv1 data was added. This information does not affect any results or conclusions. (viii) In section 3.3, text following text 'Since external shear is not astrophysical.. . ' to 'To replace the external shear with a more physically motivated component.. . ' was revised, (ix) In section 3.3, the authors added the reference to the work of an earlier paper, which will help the reader. The added text is: 'For a discussion on how deflection fields are affected by external mass clumps, see the work of Mahler et al. (2018) on the cluster Abell 2744.' (x) Toward the end of section 4.4, the following text was added: 'We note that A370 has a much more complicated structure compared to the simplified analysis of this section, but it should not affect the overall behaviour.' This should help the reader understand the previous statements better. (xi) In section 5, in the second paragraph, the authors added the following information: 'The use of the Schechter LF at high redshifts is further justified by Bouwens et al. (2015).' (xii) In addition, the authors corrected a number of minor errors, including the erroneous use of articles, typographical errors and capitalizations.
- Published
- 2021
33. Further support for a trio of mass-to-light deviations in Abell 370: free-form grale lens inversion using BUFFALO strong lensing data
- Author
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Ghosh, Agniva, primary, Williams, Liliya L R, additional, Liesenborgs, Jori, additional, Acebron, Ana, additional, Jauzac, Mathilde, additional, Koekemoer, Anton M, additional, Mahler, Guillaume, additional, Niemiec, Anna, additional, Steinhardt, Charles, additional, Faisst, Andreas L, additional, Lagattuta, David, additional, and Natarajan, Priyamvada, additional
- Published
- 2021
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- View/download PDF
34. A glimpse over the rising walss: the reflection of post-communist transformation in the Polish discourse of gated communities
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Gasior-Niemiec, Anna, Glasze, Georg, and Putz, Robert
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Poland -- Social aspects ,Poland -- Political aspects ,Post-communism -- Analysis ,International relations ,Political science - Published
- 2009
35. The BUFFALO HST Survey
- Author
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Steinhardt, Charles L., primary, Jauzac, Mathilde, additional, Acebron, Ana, additional, Atek, Hakim, additional, Capak, Peter, additional, Davidzon, Iary, additional, Eckert, Dominique, additional, Harvey, David, additional, Koekemoer, Anton M., additional, Lagos, Claudia D. P., additional, Mahler, Guillaume, additional, Montes, Mireia, additional, Niemiec, Anna, additional, Nonino, Mario, additional, Oesch, P. A., additional, Richard, Johan, additional, Rodney, Steven A., additional, Schaller, Matthieu, additional, Sharon, Keren, additional, Strolger, Louis-Gregory, additional, Allingham, Joseph, additional, Amara, Adam, additional, Bahé, Yannick, additional, Bœhm, Céline, additional, Bose, Sownak, additional, Bouwens, Rychard J., additional, Bradley, Larry D., additional, Brammer, Gabriel, additional, Broadhurst, Tom, additional, Cañas, Rodrigo, additional, Cen, Renyue, additional, Clément, Benjamin, additional, Clowe, Douglas, additional, Coe, Dan, additional, Connor, Thomas, additional, Darvish, Behnam, additional, Diego, Jose M., additional, Ebeling, Harald, additional, Edge, A. C., additional, Egami, Eiichi, additional, Ettori, Stefano, additional, Faisst, Andreas L., additional, Frye, Brenda, additional, Furtak, Lukas J., additional, Gómez-Guijarro, C., additional, Remolina González, J. D., additional, Gonzalez, Anthony, additional, Graur, Or, additional, Gruen, Daniel, additional, Hensley, Hagan, additional, Hovis-Afflerbach, Beryl, additional, Jablonka, Pascale, additional, Jha, Saurabh W., additional, Jullo, Eric, additional, Kneib, Jean-Paul, additional, Kokorev, Vasily, additional, Lagattuta, David J., additional, Limousin, Marceau, additional, von der Linden, Anja, additional, Linzer, Nora B., additional, Lopez, Adrian, additional, Magdis, Georgios E., additional, Massey, Richard, additional, Masters, Daniel C., additional, Maturi, Matteo, additional, McCully, Curtis, additional, McGee, Sean L., additional, Meneghetti, Massimo, additional, Mobasher, Bahram, additional, Moustakas, Leonidas A., additional, Murphy, Eric J., additional, Natarajan, Priyamvada, additional, Neyrinck, Mark, additional, O’Connor, Kyle, additional, Oguri, Masamune, additional, Pagul, Amanda, additional, Rhodes, Jason, additional, Rich, R. Michael, additional, Robertson, Andrew, additional, Sereno, Mauro, additional, Shan, Huanyuan, additional, Smith, Graham P., additional, Sneppen, Albert, additional, Squires, Gordon K., additional, Tam, Sut-Ieng, additional, Tchernin, Céline, additional, Toft, Sune, additional, Umetsu, Keiichi, additional, Weaver, John R., additional, van Weeren, R. J., additional, Williams, Liliya L. R., additional, Wilson, Tom J., additional, Yan, Lin, additional, and Zitrin, Adi, additional
- Published
- 2020
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- View/download PDF
36. hybrid-lenstool: a self-consistent algorithm to model galaxy clusters with strong- and weak-lensing simultaneously
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Niemiec, Anna, primary, Jauzac, Mathilde, additional, Jullo, Eric, additional, Limousin, Marceau, additional, Sharon, Keren, additional, Kneib, Jean-Paul, additional, Natarajan, Priyamvada, additional, and Richard, Johan, additional
- Published
- 2020
- Full Text
- View/download PDF
37. Stellar-to-halo mass relation of cluster galaxies
- Author
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Pereira, Maria, Shan, Huanyuan, Niemiec, Anna, Jullo, Eric, Limousin, Marceau, Giocoli, Carlo, Erben, Thomas, Hildebrant, Hendrik, Kneib, Jean-Paul, Leauthaud, Alexie, Makler, Martin, Moraes, Bruno, Rozo, Eduardo, Rykoff, Eli, Van Waerbeke, Ludovic, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Argelander-Institut für Astronomie (AlfA), Rheinische Friedrich-Wilhelms-Universität Bonn, California Institute of Technology (CALTECH), Ecole Polytechnique Fédérale de Lausanne (EPFL), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Astrophysique de Marseille ( LAM ), Aix Marseille Université ( AMU ) -Institut national des sciences de l'Univers ( INSU - CNRS ) -Centre National d'Etudes Spatiales ( CNES ) -Centre National de la Recherche Scientifique ( CNRS ), Niemiec, Anna, Jullo, Eric, Limousin, Marceau, Giocoli, Carlo, Erben, Thoma, Hildebrant, Hendrik, Kneib, Jean-Paul, Leauthaud, Alexie, Makler, Martin, Moraes, Bruno, Pereira, Maria E. S., Shan, Huanyuan, Rozo, Eduardo, Rykoff, Eli, and Van Waerbeke, Ludovic
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Galaxy Clusters ,[ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph] ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Linea ,[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,Lensing ,gravitational lensing: weak ,0103 physical sciences ,Cluster (physics) ,Astrophysics::Solar and Stellar Astrophysics ,Cosmology, Lensing, Galaxy Clusters ,010303 astronomy & astrophysics ,Galaxy cluster ,Astrophysics::Galaxy Astrophysics ,Physics ,010308 nuclear & particles physics ,Astronomy ,Astronomy and Astrophysics ,Galaxy ,Cosmology ,Space and Planetary Science ,[PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO] ,galaxies: clusters: general ,Mass relation ,Christian ministry ,Halo ,Astrophysics::Earth and Planetary Astrophysics ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
In the hierarchical formation model, galaxy clusters grow by accretion of smaller groups or isolated galaxies. During the infall into the centre of a cluster, the properties of accreted galaxies change. In particular, both observations and numerical simulations suggest that its dark matter halo is stripped by the tidal forces of the host. We use galaxy-galaxy weak lensing to measure the average mass of dark matter haloes of satellite galaxies as a function of projected distance to the centre of the host, for different stellar mass bins. Assuming that the stellar component of the galaxy is less disrupted by tidal stripping, stellar mass can be used as a proxy of the infall mass. We study the stellar to halo mass relation of satellites as a function of the cluster-centric distance to measure tidal stripping. We use the shear catalogues of the DES science verification archive, the CFHTLenS and the CFHT Stripe 82 (CS82) surveys, and we select satellites from the redMaPPer catalogue of clusters. For galaxies located in the outskirts of clusters, we find a stellar to halo mass relation in good agreement with the theoretical expectations from \citet{moster2013} for central galaxies. In the centre of the cluster, we find that this relation is shifted to smaller halo mass for a given stellar mass. We interpret this finding as further evidence for tidal stripping of dark matter haloes in high density environments., Comment: 15 pages, 14 figures
- Published
- 2017
38. Dark matter stripping in galaxy clusters: a look at the stellar-to-halo mass relation in the Illustris simulation
- Author
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Niemiec, Anna, primary, Jullo, Eric, additional, Giocoli, Carlo, additional, Limousin, Marceau, additional, and Jauzac, Mathilde, additional
- Published
- 2019
- Full Text
- View/download PDF
39. Stellar Ro Halo Mass Relation Of Cluster Galaxies
- Author
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Niemiec Anna
- Subjects
Quantitative Biology::Tissues and Organs ,Astrophysics::High Energy Astrophysical Phenomena ,Statistics::Other Statistics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics::Galaxy Astrophysics - Abstract
Galaxy Clusters Across Cosmic Time : oral contribution
- Published
- 2017
- Full Text
- View/download PDF
40. Clustering properties of g-selected galaxies at z similar to 0.8
- Author
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Favole, Ginevra, Comparat, Johan, Prada, Francisco, Yepes, Gustavo, Jullo, Eric, Niemiec, Anna, Kneib, Jean-Paul, Rodriguez-Torres, Sergio A., Klypin, Anatoly, Skibba, Ramin A., Mcbride, Cameron K., Eisenstein, Daniel J., Schlegel, David J., Nuza, Sebastian E., Chuang, Chia-Hsun, Delubac, Timothee, Yeche, Christophe, Schneider, Donald P., Departamento de FisicaTeorica e IFT-UAM/CSIC, Universidad Autónoma de Madrid (UAM), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Lawrence Berkeley National Laboratory [Berkeley] (LBNL), EPFL Laboratoire d’astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Universidad Autonoma de Madrid (UAM), and Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES)
- Subjects
galaxies: haloes ,[SDU]Sciences of the Universe [physics] ,cosmology: observations ,cosmology: theory ,large-scale structure of Universe ,Astrophysics::Cosmology and Extragalactic Astrophysics ,galaxies: distances and redshifts ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,galaxies: statistics ,Astrophysics::Galaxy Astrophysics - Abstract
International audience; Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELGs) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range 0.6 \textless z \textless 1.7. With current data, we explore the halo-galaxy connection by measuring three clustering properties of g-selected ELGs as matter tracers in the redshift range 0.6 \textless z \textless 1: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them on to the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub) Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at z similar to 0.8 live in haloes of (1 +/- 0.5) x 10(12) h(-1)M(circle dot) and 22.5 +/- 2.5 per cent of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio.
- Published
- 2016
41. The Dependence of Galaxy Clustering on Stellar-mass Assembly History for LRGs
- Author
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Montero-Dorta, Antonio D., primary, Pérez, Enrique, additional, Prada, Francisco, additional, Rodríguez-Torres, Sergio, additional, Favole, Ginevra, additional, Klypin, Anatoly, additional, Fernandes, Roberto Cid, additional, Delgado, Rosa M. González, additional, Domínguez, Alberto, additional, Bolton, Adam S., additional, García-Benito, Rubén, additional, Jullo, Eric, additional, and Niemiec, Anna, additional
- Published
- 2017
- Full Text
- View/download PDF
42. Interaction of ethylene oxide-propylene oxide copolymers with ionic surfactants studied by calorimetry: random versus block copolymers
- Author
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Niemiec, Anna and Loh, Watson
- Subjects
Calorimetry -- Usage ,Ethylene oxide -- Chemical properties ,Block copolymers -- Chemical properties ,Chemicals, plastics and rubber industries - Abstract
Calorimetric methods are used for studying the interaction of random and block ethylene oxide (EO)-propylene oxide (PO) copolymers with ionic surfactants. The isothermal titration calorimetry (ITC) has shown that the interaction of surfactant with block copolymers is more intense than that with a random copolymer of similar composition.
- Published
- 2008
43. A calorimetry and light scattering study of the formation and shape transition of mixed micelles of E[O.sub.20]P[P.sub.68]E[O.sub.20] triblock copolymer (P123) and nonionic surfactant ([C.sub.12]E[O.sub.6])
- Author
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Niemiec, Anna, Lof, David, Schillen, Karin, Loh, Watson, and Olofsson, Gerd
- Subjects
Block copolymers -- Analysis ,Light scattering -- Analysis ,Phosphorus compounds -- Electric properties ,Chemicals, plastics and rubber industries - Abstract
Isothermal titration, differential scanning calorimetry (DSC) and static and dynamic light scattering (SLS and DLS) are used to investigate the interaction between the nonionic surfactant [C.sub.12]E[O.sub.6] and the poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer E[O.sub.20]P[P.sub.68]E[O.sub.20] (P123). The retarded kinetics of shape transition is detected in titration calorimetric experiments and the rate of growth is found to increase with the total concentration.
- Published
- 2007
44. Stellar-to-halo mass relation of cluster galaxies
- Author
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Niemiec, Anna, primary, Jullo, Eric, additional, Limousin, Marceau, additional, Giocoli, Carlo, additional, Erben, Thomas, additional, Hildebrant, Hendrik, additional, Kneib, Jean-Paul, additional, Leauthaud, Alexie, additional, Makler, Martin, additional, Moraes, Bruno, additional, Pereira, Maria E. S., additional, Shan, Huanyuan, additional, Rozo, Eduardo, additional, Rykoff, Eli, additional, and Van Waerbeke, Ludovic, additional
- Published
- 2017
- Full Text
- View/download PDF
45. Local Self-Government as an Architect of Coalitions for Local Development
- Author
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Gąsior-Niemiec, Anna and Pawłowska, Agnieszka
- Subjects
lcsh:Personnel management. Employment management ,lcsh:HF5549-5549.5 - Abstract
The paper addresses the new role played by local self-government units in Poland. Main factors that determine the public authorities’ capacity to become architects of coalitions for local development are identified. Coalitions are defined as partnerships linking and mobilizing stakeholders anchored in three sectors: public, economic and non-governmental. The coalition-making role of the public organs is investigated on the basis of Local Action Groups (LAGs), which are pro-developmental cross-sector organizations established in rural areas of the Podkarpackie (Sub-Carpathian) Voivodesh ip, Poland. Findings are presented that draw on quantitative and qualitative results of the research project that investigated mechanisms involved in the operation of the cross-s ector coalitions. The dominant role of the public authorities in those coalitions is demonstrated. The Community-led Local Development model is referred to as the future framework for LAGs.
- Published
- 2014
46. Clustering properties ofg-selected galaxies atz∼ 0.8
- Author
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Favole, Ginevra, primary, Comparat, Johan, additional, Prada, Francisco, additional, Yepes, Gustavo, additional, Jullo, Eric, additional, Niemiec, Anna, additional, Kneib, Jean-Paul, additional, Rodríguez-Torres, Sergio A., additional, Klypin, Anatoly, additional, Skibba, Ramin A., additional, McBride, Cameron K., additional, Eisenstein, Daniel J., additional, Schlegel, David J., additional, Nuza, Sebastián E., additional, Chuang, Chia-Hsun, additional, Delubac, Timothée, additional, Yèche, Christophe, additional, and Schneider, Donald P., additional
- Published
- 2016
- Full Text
- View/download PDF
47. Perception of Intersectoral Partnerships by Individual Members (The Case of Local Action Groups)
- Author
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Pawlowska, Agnieszka, Gasior-Niemiec, Anna, and Kolomycew, Anna
- Subjects
lcsh:Social Sciences ,lcsh:H ,Partnership,Rural areas,Local Action Group,Poland ,lcsh:AZ20-999 ,lcsh:H1-99 ,lcsh:Social sciences (General) ,lcsh:History of scholarship and learning. The humanities - Abstract
The notion of intersectoral partnership is understood in terms of voluntary and institutionalized cooperation between actors representing public, private and civic sectors. The idea of partnership is related to the new approaches to regional and local development across the European Union. One of the main fields in which these approaches are implemented is the field of rural areas development, where partnerships take the form of Local Action Groups (LAGs). The paper discusses some aspects of partnership-based approach as imported to Poland. The strengths and weaknesses of this approach will be exemplified by the case of LAGs established in one of the Polish regions. Discussion is based on the empirical data gathered by authors of the paper.
- Published
- 2012
48. Zastosowanie programu ART w pracy z dziećmi i młodzieżą agresywną
- Author
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Godawa, Joanna and Niemiec, Anna
- Subjects
violence ,education ,aggression ,Aggression Replacement Training - Abstract
Aggressive behavior by children and adolescents continues to be a serious and increasing problem in our schools, on the streets, and in our communities Aggression Replacement Training (ART) is a multimodal psychoeducational intervention designed to alter the behavior of chronically aggressive adolescents and young children.
- Published
- 2009
49. Clustering properties of g-selected galaxies at z ~ 0.8.
- Author
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Favole, Ginevra, Comparat, Johan, Prada, Francisco, Yepes, Gustavo, Jullo, Eric, Niemiec, Anna, Kneib, Jean-Paul, Rodríguez-Torres, Sergio A., Klypin, Anatoly, Skibba, Ramin A., McBride, Cameron K., Eisenstein, Daniel J., Schlegel, David J., Nuza, Sebastián E., Chia-Hsun Chuang, Delubac, Timothée, Yèche, Christophe, and Schneider, Donald P.
- Subjects
CLUSTERING of particles ,GALAXIES ,REDSHIFT ,SPECTROSCOPIC light sources ,PRECIPITATION (Chemistry) - Abstract
Current and future large redshift surveys, as the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (SDSS-IV/eBOSS) or the Dark Energy Spectroscopic Instrument (DESI), will use emission-line galaxies (ELGs) to probe cosmological models by mapping the large-scale structure of the Universe in the redshift range 0.6 < z < 1.7. With current data, we explore the halo-galaxy connection by measuring three clustering properties of g-selected ELGs as matter tracers in the redshift range 0.6 < z < 1: (i) the redshift-space two-point correlation function using spectroscopic redshifts from the BOSS ELG sample and VIPERS; (ii) the angular two-point correlation function on the footprint of the CFHT-LS; (iii) the galaxy-galaxy lensing signal around the ELGs using the CFHTLenS. We interpret these observations by mapping them on to the latest high-resolution MultiDark Planck N-body simulation, using a novel (Sub)Halo-Abundance Matching technique that accounts for the ELG incompleteness. ELGs at z ~ 0.8 live in haloes of (1 ± 0.5) × 10
12 h-1 M☉ and 22.5 ± 2.5 per cent of them are satellites belonging to a larger halo. The halo occupation distribution of ELGs indicates that we are sampling the galaxies in which stars form in the most efficient way, according to their stellar-to-halo mass ratio. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
50. Extending the planetary mass function to Earth mass by microlensing at moderately high magnification
- Author
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Abe, Fumio, primary, Airey, Charlotte, additional, Barnard, Ellen, additional, Baudry, Julie, additional, Botzler, Christine, additional, Douchin, Dimitri, additional, Freeman, Matthew, additional, Larsen, Patricia, additional, Niemiec, Anna, additional, Perrott, Yvette, additional, Philpott, Lydia, additional, Rattenbury, Nicholas, additional, and Yock, Philip, additional
- Published
- 2013
- Full Text
- View/download PDF
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