The SAMI Galaxy Survey: Global stellar populations on the size-mass plane
We present an analysis of the global stellar populations of galaxies in the SAMI Galaxy Survey. Our sample consists of 1319 galaxies spanning four orders of magnitude in stellar mass and includes all morphologies and environments. We derive luminosity-weighted, single stellar population equivalent s...
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ftdatacite:10.48550/arxiv.1708.06849 2023-05-15T18:11:44+02:00 The SAMI Galaxy Survey: Global stellar populations on the size-mass plane Scott, Nicholas Brough, S. Croom, Scott M. Davies, Roger L. van de Sande, Jesse Allen, J. T. Bland-Hawthorn, Joss Bryant, Julia J. Cortese, Luca D'Eugenio, Francesco Federrath, Christoph Ferreras, Ignacio Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis Lawrence, Jon S. Medling, Anne M. Moffett, Amanda J. Owers, Matt S. Richards, Samuel Robotham, A. S. G. Tonini, Chiara Yi, Sukyoung K. 2017 https://dx.doi.org/10.48550/arxiv.1708.06849 https://arxiv.org/abs/1708.06849 unknown arXiv https://dx.doi.org/10.1093/mnras/stx2166 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Astrophysics of Galaxies astro-ph.GA FOS Physical sciences article-journal Article ScholarlyArticle Text 2017 ftdatacite https://doi.org/10.48550/arxiv.1708.06849 https://doi.org/10.1093/mnras/stx2166 2022-04-01T10:28:58Z We present an analysis of the global stellar populations of galaxies in the SAMI Galaxy Survey. Our sample consists of 1319 galaxies spanning four orders of magnitude in stellar mass and includes all morphologies and environments. We derive luminosity-weighted, single stellar population equivalent stellar ages, metallicities and alpha enhancements from spectra integrated within one effective radius apertures. Variations in galaxy size explain the majority of the scatter in the age--mass and metallicity--mass relations. Stellar populations vary systematically in the plane of galaxy size and stellar mass, such that galaxies with high stellar surface mass density are older, more metal-rich and alpha-enhanced than less dense galaxies. Galaxies with high surface mass densities have a very narrow range of metallicities, however, at fixed mass, the spread in metallicity increases substantially with increasing galaxy size (decreasing density). We identify residual correlations with morphology and environment. At fixed mass and size, galaxies with late-type morphologies, small bulges and low Sersic n are younger than early-type, high n, high bulge-to-total galaxies. Age and metallicity both show small residual correlations with environment; at fixed mass and size, galaxies in denser environments or more massive halos are older and somewhat more metal rich than those in less dense environments. We connect these trends to evolutionary tracks within the size--mass plane. : 25 pages, 18 figures, MNRAS in press Corrected typo in author list Text sami DataCite Metadata Store (German National Library of Science and Technology) |
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language |
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topic |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
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Astrophysics of Galaxies astro-ph.GA FOS Physical sciences Scott, Nicholas Brough, S. Croom, Scott M. Davies, Roger L. van de Sande, Jesse Allen, J. T. Bland-Hawthorn, Joss Bryant, Julia J. Cortese, Luca D'Eugenio, Francesco Federrath, Christoph Ferreras, Ignacio Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis Lawrence, Jon S. Medling, Anne M. Moffett, Amanda J. Owers, Matt S. Richards, Samuel Robotham, A. S. G. Tonini, Chiara Yi, Sukyoung K. The SAMI Galaxy Survey: Global stellar populations on the size-mass plane |
topic_facet |
Astrophysics of Galaxies astro-ph.GA FOS Physical sciences |
description |
We present an analysis of the global stellar populations of galaxies in the SAMI Galaxy Survey. Our sample consists of 1319 galaxies spanning four orders of magnitude in stellar mass and includes all morphologies and environments. We derive luminosity-weighted, single stellar population equivalent stellar ages, metallicities and alpha enhancements from spectra integrated within one effective radius apertures. Variations in galaxy size explain the majority of the scatter in the age--mass and metallicity--mass relations. Stellar populations vary systematically in the plane of galaxy size and stellar mass, such that galaxies with high stellar surface mass density are older, more metal-rich and alpha-enhanced than less dense galaxies. Galaxies with high surface mass densities have a very narrow range of metallicities, however, at fixed mass, the spread in metallicity increases substantially with increasing galaxy size (decreasing density). We identify residual correlations with morphology and environment. At fixed mass and size, galaxies with late-type morphologies, small bulges and low Sersic n are younger than early-type, high n, high bulge-to-total galaxies. Age and metallicity both show small residual correlations with environment; at fixed mass and size, galaxies in denser environments or more massive halos are older and somewhat more metal rich than those in less dense environments. We connect these trends to evolutionary tracks within the size--mass plane. : 25 pages, 18 figures, MNRAS in press Corrected typo in author list |
format |
Text |
author |
Scott, Nicholas Brough, S. Croom, Scott M. Davies, Roger L. van de Sande, Jesse Allen, J. T. Bland-Hawthorn, Joss Bryant, Julia J. Cortese, Luca D'Eugenio, Francesco Federrath, Christoph Ferreras, Ignacio Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis Lawrence, Jon S. Medling, Anne M. Moffett, Amanda J. Owers, Matt S. Richards, Samuel Robotham, A. S. G. Tonini, Chiara Yi, Sukyoung K. |
author_facet |
Scott, Nicholas Brough, S. Croom, Scott M. Davies, Roger L. van de Sande, Jesse Allen, J. T. Bland-Hawthorn, Joss Bryant, Julia J. Cortese, Luca D'Eugenio, Francesco Federrath, Christoph Ferreras, Ignacio Goodwin, Michael Groves, Brent Konstantopoulos, Iraklis Lawrence, Jon S. Medling, Anne M. Moffett, Amanda J. Owers, Matt S. Richards, Samuel Robotham, A. S. G. Tonini, Chiara Yi, Sukyoung K. |
author_sort |
Scott, Nicholas |
title |
The SAMI Galaxy Survey: Global stellar populations on the size-mass plane |
title_short |
The SAMI Galaxy Survey: Global stellar populations on the size-mass plane |
title_full |
The SAMI Galaxy Survey: Global stellar populations on the size-mass plane |
title_fullStr |
The SAMI Galaxy Survey: Global stellar populations on the size-mass plane |
title_full_unstemmed |
The SAMI Galaxy Survey: Global stellar populations on the size-mass plane |
title_sort |
sami galaxy survey: global stellar populations on the size-mass plane |
publisher |
arXiv |
publishDate |
2017 |
url |
https://dx.doi.org/10.48550/arxiv.1708.06849 https://arxiv.org/abs/1708.06849 |
genre |
sami |
genre_facet |
sami |
op_relation |
https://dx.doi.org/10.1093/mnras/stx2166 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1708.06849 https://doi.org/10.1093/mnras/stx2166 |
_version_ |
1766184360043610112 |