Rights statement: This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version Tania M Barone, Francesco D’Eugenio, Nicholas Scott, Matthew Colless, Sam P Vaughan, Arjen van der Wel, Amelia Fraser-McKelvie, Anna de Graaff, Jesse van de Sande, Po-Feng Wu(吳柏鋒), Rachel Bezanson, Sarah Brough, Eric Bell, Scott M Croom, Luca Cortese, Simon Driver, Anna R Gallazzi, Adam Muzzin, David Sobral, Joss Bland-Hawthorn, Julia J Bryant, Michael Goodwin, Jon S Lawrence, Nuria P F Lorente, Matt S Owers, The LEGA-C and SAMI galaxy surveys: quiescent stellar populations and the mass–size plane across 6 Gyr, Monthly Notices of the Royal Astronomical Society 2022 512, 3: 3828-3845 is available online at: https://academic.oup.com/mnras/article-abstract/512/3/3828/6549567
Accepted author manuscript, 1.58 MB, PDF document
Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - The LEGA-C and SAMI Galaxy Surveys
T2 - Quiescent Stellar Populations and the Mass-Size Plane across 6 Gyr
AU - Barone, Tania M.
AU - D'Eugenio, Francesco
AU - Scott, Nicholas
AU - Colless, Matthew
AU - Vaughan, Sam P.
AU - Wel, Arjen van der
AU - Fraser-McKelvie, Amelia
AU - Graaff, Anna de
AU - Sande, Jesse van de
AU - Wu, Po-Feng
AU - Bezanson, Rachel
AU - Brough, Sarah
AU - Bell, Eric
AU - Croom, Scott M.
AU - Cortese, Luca
AU - Driver, Simon
AU - Gallazzi, Anna R.
AU - Muzzin, Adam
AU - Sobral, David
AU - Bland-Hawthorn, Joss
AU - Bryant, Julia J.
AU - Goodwin, Michael
AU - Lawrence, Jon S.
AU - Lorente, Nuria P. F.
AU - Owers, Matt S.
N1 - This is a pre-copy-editing, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The definitive publisher-authenticated version Tania M Barone, Francesco D’Eugenio, Nicholas Scott, Matthew Colless, Sam P Vaughan, Arjen van der Wel, Amelia Fraser-McKelvie, Anna de Graaff, Jesse van de Sande, Po-Feng Wu(吳柏鋒), Rachel Bezanson, Sarah Brough, Eric Bell, Scott M Croom, Luca Cortese, Simon Driver, Anna R Gallazzi, Adam Muzzin, David Sobral, Joss Bland-Hawthorn, Julia J Bryant, Michael Goodwin, Jon S Lawrence, Nuria P F Lorente, Matt S Owers, The LEGA-C and SAMI galaxy surveys: quiescent stellar populations and the mass–size plane across 6 Gyr, Monthly Notices of the Royal Astronomical Society 2022 512, 3: 3828-3845 is available online at: https://academic.oup.com/mnras/article-abstract/512/3/3828/6549567
PY - 2022/5/31
Y1 - 2022/5/31
N2 - We investigate the change in mean stellar population age and metallicity ([Z/H]) scaling relations for quiescent galaxies from intermediate redshift ($0.60\leq z\leq0.76$) using the LEGA-C Survey, to low redshift ($0.014\leq z\leq0.10$) using the SAMI Galaxy Survey. We find that, similarly to their low-redshift counterparts, the stellar metallicity of quiescent galaxies at $0.60\leq z\leq 0.76$ closely correlates with $M_*/R_\mathrm{e}$ (a proxy for the gravitational potential or escape velocity), in that galaxies with deeper potential wells are more metal-rich. This supports the hypothesis that the relation arises due to the gravitational potential regulating the retention of metals, by determining the escape velocity required by metal-rich stellar and supernova ejecta to escape the system and avoid being recycled into later stellar generations. On the other hand, we find no correlation between stellar age and $M_*/R_\mathrm{e}^2$ (stellar mass surface density $\Sigma$) in the LEGA-C sample, despite this being a strong relation at low redshift. We consider this change in the age--$\Sigma$ relation in the context of the redshift evolution of the star-forming and quiescent populations in the mass--size plane, and find our results can be explained as a consequence of galaxies forming more compactly at higher redshifts, and remaining compact throughout their evolution. Furthermore, galaxies appear to quench at a characteristic surface density that decreases with decreasing redshift. The $z\sim 0$ age--$\Sigma$ relation is therefore a result of building up the quiescent and star-forming populations with galaxies that formed at a range of redshifts and so a range of surface densities.
AB - We investigate the change in mean stellar population age and metallicity ([Z/H]) scaling relations for quiescent galaxies from intermediate redshift ($0.60\leq z\leq0.76$) using the LEGA-C Survey, to low redshift ($0.014\leq z\leq0.10$) using the SAMI Galaxy Survey. We find that, similarly to their low-redshift counterparts, the stellar metallicity of quiescent galaxies at $0.60\leq z\leq 0.76$ closely correlates with $M_*/R_\mathrm{e}$ (a proxy for the gravitational potential or escape velocity), in that galaxies with deeper potential wells are more metal-rich. This supports the hypothesis that the relation arises due to the gravitational potential regulating the retention of metals, by determining the escape velocity required by metal-rich stellar and supernova ejecta to escape the system and avoid being recycled into later stellar generations. On the other hand, we find no correlation between stellar age and $M_*/R_\mathrm{e}^2$ (stellar mass surface density $\Sigma$) in the LEGA-C sample, despite this being a strong relation at low redshift. We consider this change in the age--$\Sigma$ relation in the context of the redshift evolution of the star-forming and quiescent populations in the mass--size plane, and find our results can be explained as a consequence of galaxies forming more compactly at higher redshifts, and remaining compact throughout their evolution. Furthermore, galaxies appear to quench at a characteristic surface density that decreases with decreasing redshift. The $z\sim 0$ age--$\Sigma$ relation is therefore a result of building up the quiescent and star-forming populations with galaxies that formed at a range of redshifts and so a range of surface densities.
KW - astro-ph.GA
KW - Galaxies: abundances
KW - Galaxies: evolution
KW - Galaxies: fundamental parameters
KW - Galaxies: statistics
KW - Galaxies: stellar content
KW - Galaxies: structure
U2 - 10.1093/mnras/stac705
DO - 10.1093/mnras/stac705
M3 - Journal article
VL - 512
SP - 3828
EP - 3845
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 3
ER -