16 results on '"Beauchesne, Benjamin"'
Search Results
2. Paper 1: The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies
- Author
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Frye, Brenda L., Pascale, Massimo, Foo, Nicholas, Leimbach, Reagen, Garuda, Nikhil, Robles, Paulina Soto, Summers, Jake, Diaz, Carlos, Kamieneski, Patrick, Furtak, Lukas, Cohen, Seth, Diego, Jose, Beauchesne, Benjamin, Windhorst, Rogier, Willner, Steve, Koekemoer, Anton M., Zitrin, Adi, Caminha, Gabriel, Caputi, Karina, Coe, Dan, Conselice, Christopher J., Dai, Liang, Dole, Herve, Driver, Simon, Grogin, Norman, Harrington, Kevin, Jansen, Rolf A., Kneib, Jean-Paul, Lehnert, Matt, Lowenthal, James, Marshall, Madeline A., Menanteau, Felipe, Pampleiga, Belen Alcalde, Pirzkal, Nor, Polletta, Mari, Richard, Johan, Robotham, Aaron, Ryan, Russell E., Rutkowski, Michael J., Sifon, Christobal, Tompkins, Scott, Wang, Daniel, Yan, Haojing, and Yun, Min S.
- Subjects
Astrophysics - Astrophysics of Galaxies - Abstract
The massive galaxy cluster El Gordo (z=0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope (JWST) Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were obtained in the ``Prime Extragalactic Areas for Reionization and Lensing Science'' (``PEARLS'') program. PSF-matched photometry across Hubble Space Telescope (HST) and NIRCam filters supplies new photometric redshifts. A new light-traces-mass lens model based on 56 image multiplicities identifies the two mass peaks and yields a mass estimate within 500 kpc of ~(7.0 +/- 0.30) x 10^14 Msun. A search for substructure in the 140 cluster members with spectroscopic redshifts confirms the two main mass components. The southeastern mass peak that contains the BCG is more tightly bound than the northwestern one. The virial mass within 1.7 Mpc is (5.1 +/- 0.60) x 10^14 Msun, lower than the lensing mass. A significant transverse velocity component could mean the virial mass is underestimated. We contribute one new member to the previously known z=4.32 galaxy group. Intrinsic (delensed) positions of the five secure group members span a physical extent of ~60 kpc. Thirteen additional candidates selected by spectroscopic/photometric constraints are small and faint with a mean intrinsic luminosity ~2.2 mag fainter than L*. NIRCam imaging admits a fairly wide range of brightnesses and morphologies for the group members, suggesting a more diverse galaxy population in this galaxy overdensity., Comment: 24 pages, accepted by ApJ
- Published
- 2023
- Full Text
- View/download PDF
3. The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies
- Author
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Frye, Brenda L, Pascale, Massimo, Foo, Nicholas, Leimbach, Reagen, Garuda, Nikhil, Robles, Paulina Soto, Summers, Jake, Diaz, Carlos, Kamieneski, Patrick, Furtak, Lukas J, Cohen, Seth H, Diego, Jose, Beauchesne, Benjamin, Windhorst, Rogier A, Willner, SP, Koekemoer, Anton M, Zitrin, Adi, Caminha, Gabriel, Caputi, Karina I, Coe, Dan, Conselice, Christopher J, Dai, Liang, Dole, Hervé, Driver, Simon P, Grogin, Norman A, Harrington, Kevin, Jansen, Rolf A, Kneib, Jean-Paul, Lehnert, Matt, Lowenthal, James, Marshall, Madeline A, Menanteau, Felipe, Pampliega, Belén Alcalde, Pirzkal, Nor, Polletta, Mari, Richard, Johan, Robotham, Aaron, Ryan, Russell E, Rutkowski, Michael J, Sifón, Christóbal, Tompkins, Scott, Wang, Daniel, Yan, Haojing, and Yun, Min S
- Subjects
Astronomical and Space Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Physical Chemistry (incl. Structural) ,Astronomy & Astrophysics - Abstract
The massive galaxy cluster El Gordo (z = 0.87) imprints multitudes of gravitationally lensed arcs onto James Webb Space Telescope Near-Infrared Camera (NIRCam) images. Eight bands of NIRCam imaging were obtained in the “Prime Extragalactic Areas for Reionization and Lensing Science” (“PEARLS”) program. Point-spread function-matched photometry across Hubble Space Telescope and NIRCam filters supplies new photometric redshifts. A new light-traces-mass lens model based on 56 image multiplicities identifies the two mass peaks and yields a mass estimate within 500 kpc of (7.0 ± 0.30) × 1014 M ⊙. A search for substructure in the 140 cluster members with spectroscopic redshifts confirms the two main mass components. The southeastern mass peak that contains the brightest cluster galaxy is more tightly bound than the northwestern one. The virial mass within 1.7 Mpc is (5.1 ± 0.60)×1014 M ⊙, lower than the lensing mass. A significant transverse velocity component could mean the virial mass is underestimated. We contribute one new member to the previously known z = 4.32 galaxy group. Intrinsic (delensed) positions of the five secure group members span a physical extent of ∼60 kpc. 13 additional candidates selected by spectroscopic/photometric constraints are small and faint, with a mean intrinsic luminosity ∼2.2 mag fainter than L *. NIRCam imaging admits a fairly wide range of brightnesses and morphologies for the group members, suggesting a more diverse galaxy population in this galaxy overdensity.
- Published
- 2023
4. A new step forward in realistic cluster lens mass modelling: Analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray and galaxy kinematics data
- Author
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Beauchesne, Benjamin, Clément, Benjamin, Hibon, Pascale, Limousin, Marceau, Eckert, Dominique, Kneib, Jean-Paul, Richard, Johan, Natarajan, Priyamvada, Jauzac, Mathilde, Montes, Mireia, Mahler, Guillaume, Claeyssens, Adélaïde, Jeanneau, Alexandre, Koekemoer, Anton M., Lagattuta, David, Pagul, Amanda, and Sánchez, Javier
- Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a new method to simultaneously/self-consistently model the mass distribution of galaxy clusters that combines constraints from strong lensing features, X-ray emission and galaxy kinematics measurements. We are able to successfully decompose clusters into their collisionless and collisional mass components thanks to the X-ray surface brightness, as well as using the dynamics of cluster members to obtain more accurate masses with the fundamental plane of elliptical galaxies. Knowledge from all observables is included through a consistent Bayesian approach in the likelihood or in physically motivated priors. We apply this method to the galaxy cluster Abell S1063 and produce a mass model that we publicly release with this paper. The resulting mass distribution presents a different ellipticities for the intra-cluster gas and the other large-scale mass components; and deviation from elliptical symmetry in the main halo. We assess the ability of our method to recover the masses of the different elements of the cluster using a mock cluster based on a simplified version of our Abell S1063 model. Thanks to the wealth of information provided by the mass model and the X-ray emission, we also found evidence for an on-going merger event with gas sloshing from a smaller infalling structure into the main cluster. In agreement with previous findings, the total mass, gas profile and gas mass fraction are consistent with small deviations from the hydrostatic equilibrium. This new mass model for Abell S1063 is publicly available as is the software used to construct it through the \textsc{Lenstool} package., Comment: 29 pages, 23 figures, Accepted for publication in MNRAS
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- 2023
5. Precision modeling of JWST's first cluster lens SMACSJ0723.3-7327
- Author
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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
- Subjects
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
- Published
- 2022
6. Dark Matter in Galaxy Clusters: a Parametric Strong Lensing Approach
- Author
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Limousin, Marceau, Beauchesne, Benjamin, and Jullo, Eric
- Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a parametric strong lensing analysis of three massive clusters. Our aim is to probe the inner shape of dark matter haloes, in particular the existence of a core. We adopt the following working hypothesis: any group/cluster scale dark matter clump introduced in the modelling should be associated with a luminous counterpart. We also adopt some additional well motivated priors in the analysis, even if this degrades the quality of the fit, quantified using the RMS between the observed and model generated images. In particular, in order to alleviate the degeneracy between the smooth underlying component and the galaxy scale perturbers, we use the results from spectroscopic campaigns by Bergamini et al. (2019) allowing to fix the mass of the galaxy scale component. In the unimodal galaxy cluster AS1063, a cored mass model is favored with respect to a non cored mass model, and this is also the case in the multimodal cluster MACSJ0416. In the unimodal cluster MACSJ1206, we fail to reproduce the strong lensing constraints using a parametric approach within the adopted working hypothesis. We then successfully add a mild perturbation in the form of a superposition of B-spline potentials which allows to get a decent fit (RMS=0.5"), finally finding that a cored mass model is favored. Overall, our analysis suggest evidence for cored cluster scale dark matter haloes. These findings may be useful to interpret within alternative dark matter scenario, as self interacting dark matter. We propose a working hypothesis for parametric strong lensing modelling where the quest for the best fit model will be balanced by the quest for presenting a physically motivated mass model, in particular by imposing priors., Comment: Final version accepted by A&A on June 2022
- Published
- 2022
- Full Text
- View/download PDF
7. Improving parametric mass modelling of lensing clusters through a perturbative approach
- Author
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Beauchesne, Benjamin, Clément, Benjamin, Richard, Johan, and Kneib, Jean-Paul
- Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a new method to model the mass distribution of galaxy clusters that combines a parametric and a free-form approach to reconstruct cluster cores with strong lensing constraints. It aims at combining the advantages of both approaches, by keeping the robustness of the parametric component with an increased flexibility thanks to a free-form surface of B-spline functions. We demonstrate the capabilities of this new approach on the simulated cluster Hera, which has been used to evaluate lensing codes for the analysis of the Frontier Fields clusters. The method leads to better reproduction of the constraints, with an improvement by a factor $\sim3-4$ on the root-mean-square error on multiple-image positions, when compared to parametric-only approaches. The resulting models show a better accuracy in the reconstruction of the amplitude of the convergence field while conserving a high fidelity on other lensing observables already well reproduced. We make this method publicly available through its implementation in the Lenstool software., Comment: 19 pages, 14 figures. Accepted for publication in MNRAS
- Published
- 2021
- Full Text
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8. The KALEIDOSCOPE survey: a new strong and weak gravitational lensing view of the massive galaxy cluster MACS J1423.8+2404.
- Author
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Patel, Nency R, Jauzac, Mathilde, Niemiec, Anna, Lagattuta, David, Mahler, Guillaume, Beauchesne, Benjamin, Edge, Alastair, Ebeling, Harald, and Limousin, Marceau
- Subjects
GRAVITATIONAL lenses ,VERY large telescopes ,SPACE telescopes ,DARK matter ,CLUSTER analysis (Statistics) ,GALAXY clusters - Abstract
We present a combined strong and weak gravitational-lensing analysis of the massive galaxy cluster MACS J1423.8+2404 (|$z=0.545$| , MACS J1423 hereafter), one of the most dynamically relaxed and massive cool-core clusters discovered in the MAssive Cluster Survey at |$z\gt 0.5$|. We combine high-resolution imaging from the Hubble Space Telescope (HST) in the F 606 W, F 814 W , and F 160 W pass-bands with spectroscopic observations taken as part of the KALEIDOSCOPE survey with the Multi-Unit Spectroscopic Explorer mounted on the Very Large Telescope. Our strong lensing analysis of the mass distribution in the cluster core is constrained by four multiple-image systems (17 individual images) within redshift range |$1.779\lt z\lt 2.840$|. Our weak lensing analysis of the cluster outskirts, confined to the HST field of view, is based on a background galaxy catalogue with a density of 57 gal arcmin |$^{-2}$|. We measure a projected mass of |$M(R\lt 200$| kpc) = (1.6 |$\pm$| 0.05) |$\times$| 10 |$^{14}$| M |$_{\rm \odot }$| from our strong lensing model, and a projected mass of |$M(R\lt 640$| kpc) = (6.6 |$\pm$| 0.6) |$\times$| 10 |$^{14}$| M |$_{\rm \odot }$| when combining with our the weak lensing constraints. Our analysis of the cluster mass distribution yields no evidence of substructures, confirming the dynamically relaxed state of MACS J1423. Our work sets the stage for future analysis of MACS J1423 in the upcoming Canadian Near-Infrared Imager and Stiltless Spectrograph Unbiased Cluster Survey for the JWST. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
9. A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data
- Author
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Beauchesne, Benjamin, primary, Clément, Benjamin, additional, Hibon, Pascale, additional, Limousin, Marceau, additional, Eckert, Dominique, additional, Kneib, Jean-Paul, additional, Richard, Johan, additional, Natarajan, Priyamvada, additional, Jauzac, Mathilde, additional, Montes, Mireia, additional, Mahler, Guillaume, additional, Claeyssens, Adélaïde, additional, Jeanneau, Alexandre, additional, Koekemoer, Anton M, additional, Lagattuta, David, additional, Pagul, Amanda, additional, and Sánchez, Javier, additional
- Published
- 2023
- Full Text
- View/download PDF
10. A new step forward in realistic cluster lens mass modelling: analysis of Hubble Frontier Field Cluster Abell S1063 from joint lensing, X-ray, and galaxy kinematics data.
- Author
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Beauchesne, Benjamin, Clément, Benjamin, Hibon, Pascale, Limousin, Marceau, Eckert, Dominique, Kneib, Jean-Paul, Richard, Johan, Natarajan, Priyamvada, Jauzac, Mathilde, Montes, Mireia, Mahler, Guillaume, Claeyssens, Adélaïde, Jeanneau, Alexandre, Koekemoer, Anton M, Lagattuta, David, Pagul, Amanda, and Sánchez, Javier
- Subjects
- *
GALAXY clusters , *HYDROSTATIC equilibrium , *KINEMATICS , *X-rays , *ELLIPTICAL galaxies , *MERGERS & acquisitions - Abstract
We present a new method to simultaneously and self-consistently model the mass distribution of galaxy clusters that combines constraints from strong lensing features, X-ray emission, and galaxy kinematics measurements. We are able to successfully decompose clusters into their collisionless and collisional mass components thanks to the X-ray surface brightness, as well as use the dynamics of cluster members, to obtain more accurate masses exploiting the fundamental plane of elliptical galaxies. Knowledge from all observables is included through a consistent Bayesian approach in the likelihood or in physically motivated priors. We apply this method to the galaxy cluster Abell S1063 and produce a mass model that we publicly release with this paper. The resulting mass distribution presents different ellipticities for the intra-cluster gas and the other large-scale mass components as well as deviation from elliptical symmetry in the main halo. We assess the ability of our method to recover the masses of the different elements of the cluster using a mock cluster based on a simplified version of our Abell S1063 model. Thanks to the wealth of mutliwavelength information provided by the mass model and the detected X-ray emission, we also found evidence for an ongoing merger event with gas sloshing from a smaller infalling structure into the main cluster. In agreement with previous findings, the total mass, gas profile, and gas mass fraction are all consistent with small deviations from the hydrostatic equilibrium. This new mass model for Abell S1063 is publicly available, as the lenstool extension used to construct it. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
11. Precision Modeling of JWST's First Cluster Lens SMACS J0723.3–7327*
- Author
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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
- Full Text
- View/download PDF
12. Precision Modeling of JWST's First Cluster Lens SMACS J0723.3–7327
- Author
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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, Niemiec, Anna, 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
- Abstract
Exploiting the fundamentally achromatic nature of gravitational lensing, we present a lens model for the massive galaxy cluster SMACS J0723.3−7323 (SMACS J0723; 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 data from the 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 SMACS J0723.3 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 points 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 SMACS J0723 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 intracluster light distribution and numerous star-forming clumps in magnified background galaxies. The high-precision lens model derived here for SMACS J0723 demonstrates the unprecedented power of combining HST and JWST data for studies of structure formation and evolution in the distant universe.
- Published
- 2023
- Full Text
- View/download PDF
13. The JWST PEARLS View of the El Gordo Galaxy Cluster and of the Structure It Magnifies
- Author
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Frye, Brenda L., Pascale, Massimo, Foo, Nicholas, Leimbach, Reagen, Garuda, Nikhil, Robles, Paulina Soto, Summers, Jake, Diaz, Carlos, Kamieneski, Patrick, Furtak, Lukas J., Cohen, Seth H., Diego, Jose, Beauchesne, Benjamin, Windhorst, Rogier A., Willner, S. P., Koekemoer, Anton M., Zitrin, Adi, Caminha, Gabriel, Caputi, Karina I., Coe, Dan, Conselice, Christopher J., Dai, Liang, Dole, Hervé, Driver, Simon P., Grogin, Norman A., Harrington, Kevin, Jansen, Rolf A., Kneib, Jean-paul, Lehnert, Matt, Lowenthal, James, Marshall, Madeline A., Menanteau, Felipe, Pampliega, Belén Alcalde, Pirzkal, Nor, Polletta, Mari, Richard, Johan, Robotham, Aaron, Ryan, Russell E., Rutkowski, Michael J., Sifón, Christóbal, Tompkins, Scott, Wang, Daniel, Yan, Haojing, Yun, Min S., Frye, Brenda L., Pascale, Massimo, Foo, Nicholas, Leimbach, Reagen, Garuda, Nikhil, Robles, Paulina Soto, Summers, Jake, Diaz, Carlos, Kamieneski, Patrick, Furtak, Lukas J., Cohen, Seth H., Diego, Jose, Beauchesne, Benjamin, Windhorst, Rogier A., Willner, S. P., Koekemoer, Anton M., Zitrin, Adi, Caminha, Gabriel, Caputi, Karina I., Coe, Dan, Conselice, Christopher J., Dai, Liang, Dole, Hervé, Driver, Simon P., Grogin, Norman A., Harrington, Kevin, Jansen, Rolf A., Kneib, Jean-paul, Lehnert, Matt, Lowenthal, James, Marshall, Madeline A., Menanteau, Felipe, Pampliega, Belén Alcalde, Pirzkal, Nor, Polletta, Mari, Richard, Johan, Robotham, Aaron, Ryan, Russell E., Rutkowski, Michael J., Sifón, Christóbal, Tompkins, Scott, Wang, Daniel, Yan, Haojing, and Yun, Min S.
- Published
- 2023
14. Dark matter in galaxy clusters: Parametric strong-lensing approach
- Author
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Limousin, Marceau, primary, Beauchesne, Benjamin, additional, and Jullo, Eric, additional
- Published
- 2022
- Full Text
- View/download PDF
15. High Precision Strong Lensing Mass Models with X-ray and Galaxy Kinematics Measurements: the Case of Abell S1063
- Author
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Beauchesne, Benjamin
- Subjects
Astrophysics::Cosmology and Extragalactic Astrophysics - Abstract
Most galaxy cluster mass modelling techniques take benefit of the strong gravitational lensing in their core to probe their mass distribution. If this approach leads to rather precise reconstruction of the matter distribution, systematics effects may bias the results. In order to reach high precision with limited systematics we propose to take into account other observables that are tracing specific cluster components, to enhance the recovering of their intrinsic distribution as well as disentangling them. In that regard, we propose to use jointly with the strong lensing, the X-ray surface brightness of the cluster, as well as kinematics measurements of its galaxies from MUSE data. As this method directly uses the different observables and optimises model parameters in a single process, it is expected to reduce the bias inherent in each one and provide a more comprehensive error assessment. We will present how these other constraints are taken into account together with the first results of this new approach on the Frontier Field galaxy cluster Abell S1063. We will discuss the higher precision model and its differences with previous modelling approach.
- Published
- 2022
- Full Text
- View/download PDF
16. Improving parametric mass modelling of lensing clusters through a perturbative approach
- Author
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Beauchesne, Benjamin, primary, Clément, Benjamin, additional, Richard, Johan, additional, and Kneib, Jean-Paul, additional
- Published
- 2021
- Full Text
- View/download PDF
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