Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/27421
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Onodera, M. | en_US |
dc.contributor.author | Carollo, C. M. | en_US |
dc.contributor.author | Renzini, A. | en_US |
dc.contributor.author | Cappellari, M. | en_US |
dc.contributor.author | Mancini, C. | en_US |
dc.contributor.author | Arimoto, N. | en_US |
dc.contributor.author | Daddi, E. | en_US |
dc.contributor.author | Gobat, R. | en_US |
dc.contributor.author | STRAZZULLO, VERONICA | en_US |
dc.contributor.author | Tacchella, S. | en_US |
dc.contributor.author | Yamada, Y. | en_US |
dc.date.accessioned | 2020-09-16T12:54:31Z | - |
dc.date.available | 2020-09-16T12:54:31Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27421 | - |
dc.description.abstract | We investigate the stellar population properties of a sample of 24 massive quenched galaxies at 1.25< z<SUB>spec</SUB>< 2.09 identified in the COSMOS field with our Subaru/Multi-object Infrared Camera and Spectrograph near-IR spectroscopic observations. Tracing the stellar population properties as close to their major formation epoch as possible, we try to put constraints on the star formation history, post-quenching evolution, and possible progenitor star-forming populations for such massive quenched galaxies. By using a set of Lick absorption line indices on a rest-frame optical composite spectrum, the average age, metallicity [Z/H], and α-to-iron element abundance ratio [α/Fe] are derived as log(age/Gyr)=0.04<SUB>-0.08</SUB><SUP>+0.10</SUP>, [Z/H]=0.24<SUB>-0.14</SUB><SUP>+0.20</SUP>, and [α /Fe]=0.31<SUB>-0.12</SUB><SUP>+0.12</SUP>, respectively. If our sample of quenched galaxies at < z≥1.6 is evolved passively to z = 0, their stellar population properties will align in excellent agreement with local counterparts at similar stellar velocity dispersions, which qualifies them as progenitors of local massive early-type galaxies. Redshift evolution of stellar population ages in quenched galaxies combined with low redshift measurements from the literature suggests a formation redshift of z<SUB>f</SUB>∼ 2.3, around which the bulk of stars in these galaxies have been formed. The measured [α/Fe] value indicates a star formation timescale of ≲ 1 Gyr, which can be translated into a specific star formation rate of ≃ 1 Gyr<SUP>-1</SUP> prior to quenching. Based on these findings, we discuss identifying possible progenitor star-forming galaxies at z≃ 2.3. We identify normal star-forming galaxies, i.e., those on the star-forming main sequence, followed by a rapid quenching event, as likely precursors of the quenched galaxies at < z≥1.6 presented here. <P />Based on data collected at the Subaru telescope, which is operated by the National Astronomical Observatory of Japan. (Proposal IDs: S09A-043, S10A-058, and S11A-075.) | en_US |
dc.language.iso | eng | en_US |
dc.title | The Ages, Metallicities, and Element Abundance Ratios of Massive Quenched Galaxies at z ≍ 1.6 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1088/0004-637X/808/2/161 | en_US |
dc.identifier.scopus | 2-s2.0-84942133803 | en_US |
dc.identifier.isi | 000371002400056 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.1088/0004-637X/808/2/161 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 808 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 161 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2015ApJ...808..161O | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Trieste | - |
crisitem.author.orcid | 0000-0001-7975-2894 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
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