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Your search keyword '"galaxies: fundamental parameter"' showing total 4 results
Start Over Descriptor "galaxies: fundamental parameter" Publisher hal ccsd
4 results on '"galaxies: fundamental parameter"'

1. Probing black hole accretion tracks, scaling relations and radiative efficiencies from stacked X-ray active galactic nuclei

Author

Ravi K. Sheth, Giulia Rodighiero, Tonima Tasnim Ananna, Angela Bongiorno, David M. Alexander, R. Carraro, Benjamin P. Moster, Mar Mezcua, Francesca Civano, Lorenzo Zanisi, Youjun Lu, Federica Ricci, Carolin Villforth, Fabio La Franca, Hao Fu, Ivan Delvecchio, David H. Weinberg, Guang Yang, Hyewon Suh, Viola Allevato, Mariangela Bernardi, Nicola Menci, Philip J. Grylls, Andrea Lapi, Christopher Marsden, Emanuele Daddi, Francesco Shankar, F. Duras, Giorgio Calderone, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Shankar, Francesco, Weinberg, David H, Marsden, Christopher, Grylls, Philip J, Bernardi, Mariangela, Yang, Guang, Moster, Benjamin, Fu, Hao, Carraro, Rosamaria, Alexander, David M, Allevato, Viola, Ananna, Tonima T, Bongiorno, Angela, Calderone, Giorgio, Civano, Francesca, Daddi, Emanuele, Delvecchio, Ivan, Duras, Federica, La Franca, Fabio, Lapi, Andrea, Lu, Youjun, Menci, Nicola, Mezcua, Mar, Ricci, Federica, Rodighiero, Giulia, Sheth, Ravi K, Suh, Hyewon, Villforth, Carolin, Zanisi, Lorenzo, Leverhulme Trust, Comisión Nacional de Investigación Científica y Tecnológica (Chile), Science and Technology Facilities Council (UK), and European Commission

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Active galactic nucleus, Stellar mass, Astrophysics::High Energy Astrophysical Phenomena, fundamental parameters, galaxies: nuclei, quasars: supermassive black holes, galaxies: star formation [black hole physics, galaxies], black hole physics, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, star formation [Galaxies], 01 natural sciences, General Relativity and Quantum Cosmology, Settore FIS/05 - Astronomia e Astrofisica, 0103 physical sciences, Radiative transfer, quasars: supermassive black hole, 010303 astronomy & astrophysics, galaxies: fundamental parameter, Astrophysics::Galaxy Astrophysics, High Energy Astrophysical Phenomena (astro-ph.HE), Physics, Supermassive black hole, 010308 nuclear & particles physics, quasars: supermassive black holes, Astronomy and Astrophysics, galaxies: fundamental parameters, Black hole physics, black hole physic, galaxies:) quasars: supermassive black holes, Astrophysics - Astrophysics of Galaxies, Accretion (astrophysics), Redshift, Galaxy, Black hole, galaxies: nuclei, galaxies: structure, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), nuclei [Galaxies], galaxies: star formation, fundamental parameters [Galaxies], Astrophysics::Earth and Planetary Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], supermassive black holes [Quasars]
Abstract

The masses of supermassive black holes at the centres of local galaxies appear to be tightly correlated with the mass and velocity dispersions of their galactic hosts. However, the local Mbh–Mstar relation inferred from dynamically measured inactive black holes is up to an order-of-magnitude higher than some estimates from active black holes, and recent work suggests that this discrepancy arises from selection bias on the sample of dynamical black hole mass measurements. In this work, we combine X-ray measurements of the mean black hole accretion luminosity as a function of stellar mass and redshift with empirical models of galaxy stellar mass growth, integrating over time to predict the evolving Mbh–Mstar relation. The implied relation is nearly independent of redshift, indicating that stellar and black hole masses grow, on average, at similar rates. Matching the de-biased local Mbh–Mstar relation requires a mean radiative efficiency ε ≳ 0.15, in line with theoretical expectations for accretion on to spinning black holes. However, matching the ‘raw’ observed relation for inactive black holes requires ε ∼ 0.02, far below theoretical expectations. This result provides independent evidence for selection bias in dynamically estimated black hole masses, a conclusion that is robust to uncertainties in bolometric corrections, obscured active black hole fractions, and kinetic accretion efficiency. For our fiducial assumptions, they favour moderate-to-rapid spins of typical supermassive black holes, to achieve ε ∼ 0.12–0.20. Our approach has similarities to the classic Soltan analysis, but by using galaxy-based data instead of integrated quantities we are able to focus on regimes where observational uncertainties are minimized., FS acknowledges partial support from a Leverhulme Trust Research Fellowship. RC acknowledges financial support from CONICYT Doctorado Nacional N° 21161487 and CONICYT PIA ACT172033. DMA thanks the Science and Technology Facilities Council (STFC) for support from grant no. ST/L00075X/1. ID is supported by the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement no. 788679. MM acknowledges support from the Beatriu de Pinos fellowship (2017-BP-00114).

Published
2020
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2. The instantaneous radial growth rate of stellar discs

Author

Filippo Fraternali, Juan Carlos Munoz-Mateos, Gabriele Pezzulli, Samuel Boissier, 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 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), Astronomy, G. Pezzulli, F. Fraternali, S. Boissier, and J.C. Muñoz-Mateos

Subjects
galaxies: spiral, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Disc galaxy, Growth rate, Disc, galaxies: fundamental parameter, Astrophysics::Galaxy Astrophysics, Physics, Luminous infrared galaxy, Spiral galaxy, [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph], Star formation, Astronomy and Astrophysics, galaxies: fundamental parameters, Astrophysics - Astrophysics of Galaxies, Galaxy, Space and Planetary Science, galaxies: star formation, Astrophysics of Galaxies (astro-ph.GA), Elliptical galaxy, galaxies: stellar content, galaxies: structure, Astrophysics::Earth and Planetary Astrophysics, galaxies: evolution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Abstract

We present a new and simple method to measure the instantaneous mass and radial growth rates of the stellar discs of spiral galaxies, based on their star formation rate surface density (SFRD) profiles. Under the hypothesis that discs are exponential with time-varying scalelengths, we derive a universal theoretical profile for the SFRD, with a linear dependence on two parameters: the specific mass growth rate $\nu_\textrm{M} \equiv \dot{M_\star}/M_\star$ and the specific radial growth rate $\nu_\textrm{R} \equiv \dot{R}_\star/R_\star$ of the disc. We test our theory on a sample of 35 nearby spiral galaxies, for which we derive a measurement of $\nu_\textrm{M}$ and $\nu_\textrm{R}$. 32/35 galaxies show the signature of ongoing inside-out growth ($\nu_\textrm{R} > 0$). The typical derived e-folding timescales for mass and radial growth in our sample are ~ 10 Gyr and ~ 30 Gyr, respectively, with some systematic uncertainties. More massive discs have a larger scatter in $\nu_\textrm{M}$ and $\nu_\textrm{R}$, biased towards a slower growth, both in mass and size. We find a linear relation between the two growth rates, indicating that our galaxy discs grow in size at ~ 0.35 times the rate at which they grow in mass; this ratio is largely unaffected by systematics. Our results are in very good agreement with theoretical expectations if known scaling relations of disc galaxies are not evolving with time., Comment: MNRAS, accepted. 14 pages, 4 figures, 3 tables. Additional material (Atlas.pdf) available at http://www.filippofraternali.com/downloads/index.html

Published
2015
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3. The VIMOS Public Extragalactic Redshift Survey (VIPERS): spectral classification through principal component analysis

Author

O. Le Fevre, Katarzyna Małek, Rita Tojeiro, D. Maccagni, L. Guennou, Ummi Abbas, J. Krywult, C. Adami, H. Schlagenhaufer, Stephane Arnouts, John A. Peacock, G. De Lucia, C. Schimd, B. R. Granett, C. Di Porto, A. Pollo, H. J. McCracken, Will J. Percival, B. Meneux, M. Wolk, I. Davidzon, O. Cucciati, S. de la Torre, L. A. M. Tasca, A. Zanichelli, Robert C. Nichol, D. Bottini, Lauro Moscardini, Julien Bel, Marco Scodeggio, A. Iovino, M. Polletta, M. Bolzonella, P. Franzetti, V. Le Brun, O. Ilbert, Jean Coupon, Jeremy Blaizot, B. Garilli, A. Fritz, Christian Marinoni, D. Vergani, Federico Marulli, M. Fumana, A. Marchetti, Yannick Mellier, L. Paioro, Angela Burden, Stefanie Phleps, Marco Bersanelli, Enzo Branchini, A. Cappi, Luigi Guzzo, G. Zamorani, Department of Marine, Earth, and Atmospheric Sciences [NCSU] (MEAS), North Carolina State University [Raleigh] (NC State), University of North Carolina System (UNC)-University of North Carolina System (UNC), INAF - Osservatorio Astrofisico di Torino (OATo), Istituto Nazionale di Astrofisica (INAF), AUTRES, Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Dipartimento di Fisica, Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB)-Università degli Studi di Milano = University of Milan (UNIMI), 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), Simon Fraser University (SFU.ca), National Research Council of Canada (NRC), Institut d'Astrophysique de Paris (IAP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astrofisico di Arcetri (OAA), Service de Physique Théorique (SPhT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique Théorique - UMR 6207 (CPT), Université de la Méditerranée - Aix-Marseille 2-Université de Provence - Aix-Marseille 1-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), A. Marchetti, B. R. Granett, L. Guzzo, A. Fritz, B. Garilli, M. Scodeggio, U. Abba, C. Adami, S. Arnout, M. Bolzonella, D. Bottini, A. Cappi, J. Coupon, O. Cucciati, G. De Lucia, S. de la Torre, P. Franzetti, M. Fumana, O. Ilbert, A. Iovino, J. Krywult, V. Le Brun, O. Le Fevre, D. Maccagni, K. Malek, F. Marulli, H. J. McCracken, B. Meneux, L. Paioro, M. Polletta, A. Pollo, H. Schlagenhaufer, L. Tasca, R. Tojeiro, D. Vergani, A. Zanichelli, J. Bel, M. Bersanelli, J. Blaizot, E. Branchini, A. Burden, I. Davidzon, C. D. Porto, L. Guennou, C. Marinoni, Y. Mellier, L. Moscardini, R. C. Nichol, J. A. Peacock, W. J. Percival, S. Phlep, C. Schimd, M. Wolk, G. Zamorani, Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB)-Università degli Studi di Milano [Milano] (UNIMI), 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), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre National de la Recherche Scientifique (CNRS)-Université de Toulon (UTLN)-Université de Provence - Aix-Marseille 1-Université de la Méditerranée - Aix-Marseille 2, Marchetti, A., Granett, B. R., Guzzo, L., Fritz, A., Garilli, B., Scodeggio, M., Abbas, U., Adami, C., Arnouts, S., Bolzonella, M., Bottini, D., Cappi, A., Coupon, J., Cucciati, O., De Lucia, G., de la Torre, S., Franzetti, P., Fumana, M., Ilbert, O., Iovino, A., Krywult, J., Le Brun, V., Le Fevre, O., Maccagni, D., Malek, K., Marulli, F., Mccracken, H. J., Meneux, B., Paioro, L., Polletta, M., Pollo, A., Schlagenhaufer, H., Tasca, L., Tojeiro, R., Vergani, D., Zanichelli, A., Bel, J., Bersanelli, M., Blaizot, J., Branchini, ENZO FRANCO, Burden, A., Davidzon, I., Di Porto, C., Guennou, L., Marinoni, C., Mellier, Y., Moscardini, L., Nichol, R. C., Peacock, J. A., Percival, W. J., Phleps, S., Schimd, C., Wolk, M., and Zamorani, G.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Stellar classification, 01 natural sciences, Spectral line, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], 0103 physical sciences, data analysis [methods], fundamental parameters [galaxies], 010303 astronomy & astrophysics, galaxies: fundamental parameter, Astrophysics::Galaxy Astrophysics, ComputingMilieux_MISCELLANEOUS, media_common, Physics, 010308 nuclear & particles physics, Star formation, Astronomy, Astronomy and Astrophysics, Redshift survey, galaxies: general, Galaxy, Noise, Space and Planetary Science, Sky, Principal component analysis, spectroscopic [techniques], techniques: spectroscopic, Astrophysics - Cosmology and Nongalactic Astrophysics, general [galaxies], Methods: data analysi
Abstract

We develop a Principal Component Analysis aimed at classifying a sub-set of 27,350 spectra of galaxies in the range 0.4 < z < 1.0 collected by the VIMOS Public Extragalactic Redshift Survey (VIPERS). We apply an iterative algorithm to simultaneously repair parts of spectra affected by noise and/or sky residuals, and reconstruct gaps due to rest-frame transformation, and obtain a set of orthogonal spectral templates that span the diversity of galaxy types. By taking the three most significant components, we find that we can describe the whole sample without contamination from noise. We produce a catalogue of eigen-coefficients and template spectra that will be part of future VIPERS data releases. Our templates effectively condense the spectral information into two coefficients that can be related to the age and star formation rate of the galaxies. We examine the spectrophotometric types in this space and identify early, intermediate, late and starburst galaxies., 15 pages, 20 images, accepted for publication in MNRAS: MN-12-1739-MJ.R1

Published
2013
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4. The VIMOS VLT Deep Survey: star formation rate density of Lyα emitters from a sample of 217 galaxies with spectroscopic redshifts 2 ≤ z ≤ 6.6

Author

E. Zucca, A. Zanichelli, Paolo Cassata, Lucia Pozzetti, H. J. McCracken, A. Cappi, L. Tresse, R. M. Bielby, Olga Cucciati, D. Maccagni, B. Garilli, O. Le Fevre, Daniela Vergani, A. Pollo, G. Zamorani, S. Bardelli, Marco Scodeggio, Yannick Mellier, Thierry Contini, V. Le Brun, O. Ilbert, 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), P. Cassata, O. Le Fèvre, B. Garilli, D. Maccagni, V. Le Brun, M. Scodeggio, L. Tresse, O. Ilbert, G. Zamorani, O. Cucciati, T. Contini, R. Bielby, Y. Mellier, H. J. McCracken, A. Pollo, A. Zanichelli, S. Bardelli, A. Cappi, L. Pozzetti, D. Vergani, and E. Zucca

Subjects
cosmology: observations, galaxies: evolution, galaxies: formation, galaxies: fundamental parameters, Astronomy and Astrophysics, Space and Planetary Science, Astrophysics, 01 natural sciences, Luminosity, 0103 physical sciences, Galaxy formation and evolution, [INFO]Computer Science [cs], Emission spectrum, 010303 astronomy & astrophysics, galaxies: fundamental parameter, ComputingMilieux_MISCELLANEOUS, Line (formation), Luminosity function (astronomy), Physics, cosmology: observation, 010308 nuclear & particles physics, Star formation, Redshift, Galaxy, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Aims. The aim of this work is to study the contribution of the Ly-a emitters (LAE) to the star formation rate density (SFRD) of the Universe in the interval 21.5x10^18 erg/s/cm^2 are 33 galaxies/arcmin^2 and 4x10^-2 Mpc^-3, respectively. We find that the the observed luminosity function of LAE does not evolve from z=2 to z=6. This implies that, after correction for the redshift-dependent IGM absorption, the intrinsic LF must have evolved significantly over 3 Gyr. The SFRD from LAE contributes to about 20% of the SFRD at z =2-3, while the LAE appear to be the dominant source of star formation producing ionizing photons in the early universe z>5-6, becoming equivalent to that of Lyman Break galaxies., Comment: 17 pages, 20 figures, accepted for publication to A&A

Published
2011
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