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 (Sydney-AAO Multi-object Integral field spectrograph) Galaxy Survey. Our sample consists of 1319 galaxies spanning four orders of magnitude in stellar mass and includes all morphologies and environments. We derive lumin...
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ftcaltechauth:oai:authors.library.caltech.edu:8r54s-h1h79 2024-06-23T07:56:32+00:00 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. 2017-12-11 https://doi.org/10.1093/mnras/stx2166 unknown Royal Astronomical Society https://arxiv.org/abs/1708.06849 https://doi.org/10.1093/mnras/stx2166 oai:authors.library.caltech.edu:8r54s-h1h79 eprintid:82930 resolverid:CaltechAUTHORS:20171103-084807136 info:eu-repo/semantics/openAccess Other Monthly Notices of the Royal Astronomical Society, 472(3), 2833-2855, (2017-12-11) galaxies: elliptical and lenticular cD– galaxies: evolution – galaxies: formation – galaxies: spiral – galaxies: stellar content info:eu-repo/semantics/article 2017 ftcaltechauth https://doi.org/10.1093/mnras/stx2166 2024-06-12T02:00:33Z We present an analysis of the global stellar populations of galaxies in the SAMI (Sydney-AAO Multi-object Integral field spectrograph) 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 Sérsic n are younger than early type, high n, high bulge-to-total galaxies. Both age and metallicity show small residual correlations with environment; at fixed mass and size, galaxies in denser environments or more massive haloes 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. © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 August 21. Received 2017 August 20; in original form 2017 May 18. Published: 24 August 2017. NS thanks Richard McDermid for helpful discussions and the anonymous referee for their constructive suggestions about the manuscript. The SGS is based on observations made at the Anglo-Australian Telescope. The SAMI was developed jointly by the University of Sydney and the Australian ... Article in Journal/Newspaper sami Caltech Authors (California Institute of Technology) Monthly Notices of the Royal Astronomical Society 472 3 2833 2855 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
galaxies: elliptical and lenticular cD– galaxies: evolution – galaxies: formation – galaxies: spiral – galaxies: stellar content |
spellingShingle |
galaxies: elliptical and lenticular cD– galaxies: evolution – galaxies: formation – galaxies: spiral – galaxies: stellar content 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 |
galaxies: elliptical and lenticular cD– galaxies: evolution – galaxies: formation – galaxies: spiral – galaxies: stellar content |
description |
We present an analysis of the global stellar populations of galaxies in the SAMI (Sydney-AAO Multi-object Integral field spectrograph) 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 Sérsic n are younger than early type, high n, high bulge-to-total galaxies. Both age and metallicity show small residual correlations with environment; at fixed mass and size, galaxies in denser environments or more massive haloes 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. © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2017 August 21. Received 2017 August 20; in original form 2017 May 18. Published: 24 August 2017. NS thanks Richard McDermid for helpful discussions and the anonymous referee for their constructive suggestions about the manuscript. The SGS is based on observations made at the Anglo-Australian Telescope. The SAMI was developed jointly by the University of Sydney and the Australian ... |
format |
Article in Journal/Newspaper |
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 |
Royal Astronomical Society |
publishDate |
2017 |
url |
https://doi.org/10.1093/mnras/stx2166 |
genre |
sami |
genre_facet |
sami |
op_source |
Monthly Notices of the Royal Astronomical Society, 472(3), 2833-2855, (2017-12-11) |
op_relation |
https://arxiv.org/abs/1708.06849 https://doi.org/10.1093/mnras/stx2166 oai:authors.library.caltech.edu:8r54s-h1h79 eprintid:82930 resolverid:CaltechAUTHORS:20171103-084807136 |
op_rights |
info:eu-repo/semantics/openAccess Other |
op_doi |
https://doi.org/10.1093/mnras/stx2166 |
container_title |
Monthly Notices of the Royal Astronomical Society |
container_volume |
472 |
container_issue |
3 |
container_start_page |
2833 |
op_container_end_page |
2855 |
_version_ |
1802649667735912448 |