Luminous early-type field galaxies at <i>z</i>∼0.4 -: II.: Star formation history and space density
| dc.contributor.author | Willis, JP | |
| dc.contributor.author | Hewett, PC | |
| dc.contributor.author | Warren, SJ | |
| dc.contributor.author | Lewis, GF | |
| dc.date.accessioned | 2025-01-21T01:10:08Z | |
| dc.date.available | 2025-01-21T01:10:08Z | |
| dc.date.issued | 2002 | |
| dc.description.abstract | We present a combined photometric and spectroscopic analysis of the star formation history and space density of a sample of 485 luminous, M-V - 5 log h < -20.5, field early-type galaxies at redshifts 0.3 ≲ z ≲ 0.6. The observed b(J)ori colours as a function of redshift, mean absorption-line strengths and [O II] λ3727 emission properties are used to constrain the star formation history of the galaxies. The mean star formation history of the early-type galaxy sample is consistent with an old (z(f) > 1), passively evolving luminosity-weighted stellar population. 21 per cent of the sample possess detectable [O II] lambda3727 emission consistent with a low level (less than or similar to1 M-circle dot yr(-1)) of on-going star formation. Parametric and non-parametric estimates of the space density of the sample are derived. The integrated luminosity density at z similar or equal to 0.4, allowing only for passive luminosity evolution, is in excellent agreement with the local, ((z) = 0.1), luminosity density of early-type galaxies. Overall, the sample properties are consistent with a galaxy formation scenario in which the majority of luminous field early-type galaxies formed at redshifts z > 1 and have largely evolved passively since the formation epoch. | |
| dc.fuente.origen | WOS | |
| dc.identifier.issn | 0035-8711 | |
| dc.identifier.uri | https://repositorio.uc.cl/handle/11534/96654 | |
| dc.identifier.wosid | WOS:000179648100022 | |
| dc.issue.numero | 3 | |
| dc.language.iso | en | |
| dc.pagina.final | 966 | |
| dc.pagina.inicio | 953 | |
| dc.revista | Monthly notices of the royal astronomical society | |
| dc.rights | acceso restringido | |
| dc.subject | galaxies : formation | |
| dc.subject | galaxies : fundamental parameters | |
| dc.subject | galaxies : luminosity function, mass function | |
| dc.subject | galaxies : stellar content | |
| dc.title | Luminous early-type field galaxies at <i>z</i>∼0.4 -: II.: Star formation history and space density | |
| dc.type | artículo | |
| dc.volumen | 337 | |
| sipa.index | WOS | |
| sipa.trazabilidad | WOS;2025-01-12 |