The elemental abundance of quiescent galaxies in the LEGA-C survey: the (non-)evolution of [α/Fe] from z=0.75 to z=0

Simple item page
dc.contributor.authorBevacqua, Davide
dc.contributor.authorSaracco, Paolo
dc.contributor.authorLa Barbera, Francesco
dc.contributor.authorD'Ago, Giuseppe
dc.contributor.authorDe Propris, Roberto
dc.contributor.authorFerreras, Ignacio
dc.contributor.authorGallazzi, Anna
dc.contributor.authorPasquali, Anna
dc.contributor.authorSpiniello, Chiara
dc.date.accessioned2025-01-20T17:17:33Z
dc.date.available2025-01-20T17:17:33Z
dc.date.issued2023
dc.description.abstractWe measure the [alpha/Fe] abundances for 183 quiescent galaxies at z = 0.60-0.75 with stellar masses ranging 10.4 <= log(10)(M-*/M-circle dot) <= 11.6 selected from the Large Early Galaxy Astrophysics Census survey. We estimate [alpha/Fe] from the ratio of the spectral indices Mgb (lambda similar to 5177 angstrom) and Fe4383, compared to predictions of simple stellar population models. We find that 91 percent of quiescents in our sample have supersolar [alpha/Fe], with an average value of [alpha/Fe] = +0.24 +/- 0.01. We find no significant correlation between [alpha/Fe] and stellar metallicity, mass, velocity dispersion, and average formation time. Galaxies that formed the bulk of their stellar mass on time-scales shorter than 1 Gyr follow the same [alpha/Fe] distribution as those which formed on longer time-scales. In comparison to local early-type galaxies and to stacked spectra of quiescent galaxies at z = 0.38 and z = 0.07, we find that the average [alpha/Fe] has not changed between z = 0.75 and the present time. Our work shows that the vast majority of massive quiescent galaxies at z similar to 0.7 are alpha-enhanced, and that no detectable evolution of the average [alpha/Fe] has taken place over the last similar to 6.5 Gyr.
dc.fuente.origenWOS
dc.identifier.doi10.1093/mnras/stad2403
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1093/mnras/stad2403
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/91361
dc.identifier.wosidWOS:001144520100046
dc.issue.numero3
dc.language.isoen
dc.pagina.final4230
dc.pagina.inicio4219
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectgalaxies: abundances
dc.subjectgalaxies: elliptical and lenticular
dc.subjectcD
dc.subjectgalaxies: evolution
dc.subjectgalaxies: formation
dc.titleThe elemental abundance of quiescent galaxies in the LEGA-C survey: the (non-)evolution of [α/Fe] from z=0.75 to z=0
dc.typeartículo
dc.volumen525
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
Files
Collections
Artículos de revistas