UV-optical colors as probes of early-type galaxy evolution
dc.contributor.author | Kaviraj, S. | |
dc.contributor.author | Schawinski, K. | |
dc.contributor.author | Devriendt, J.E.G. | |
dc.contributor.author | Ferreras, I. | |
dc.contributor.author | Khochfar, S. | |
dc.contributor.author | Yoon, S.-J. | |
dc.contributor.author | Yi, S.K. | |
dc.contributor.author | Lee, Y.-W. | |
dc.contributor.author | Deharveng, J.-M. | |
dc.contributor.author | Boselli, A. | |
dc.contributor.author | Donas, J. | |
dc.contributor.author | Milliard, B. | |
dc.contributor.author | Barlow, T. | |
dc.contributor.author | Conrow, T. | |
dc.contributor.author | Forster, K. | |
dc.contributor.author | Friedman, P.G. | |
dc.contributor.author | Martin, D.C. | |
dc.contributor.author | Morrissey, P. | |
dc.contributor.author | Seibert, M. | |
dc.contributor.author | Small, T. | |
dc.contributor.author | Wyder, T. | |
dc.contributor.author | Neff, S. | |
dc.contributor.author | Schiminovich, D. | |
dc.contributor.author | Bianchi, L. | |
dc.contributor.author | Heckman, T. | |
dc.contributor.author | Szalay, A. | |
dc.contributor.author | Madore, B. | |
dc.contributor.author | Rich, R.M. | |
dc.date.accessioned | 2013-10-30T11:30:57Z | |
dc.date.available | 2013-10-30T11:30:57Z | |
dc.date.issued | 2007-12-01 | |
dc.identifier.citation | Kaviraj , S , Schawinski , K , Devriendt , J E G , Ferreras , I , Khochfar , S , Yoon , S-J , Yi , S K , Lee , Y-W , Deharveng , J-M , Boselli , A , Donas , J , Milliard , B , Barlow , T , Conrow , T , Forster , K , Friedman , P G , Martin , D C , Morrissey , P , Seibert , M , Small , T , Wyder , T , Neff , S , Schiminovich , D , Bianchi , L , Heckman , T , Szalay , A , Madore , B & Rich , R M 2007 , ' UV-optical colors as probes of early-type galaxy evolution ' , Astrophysical Journal, Supplement Series , vol. 173 , no. 2 , pp. 619-642 . https://doi.org/10.1086/516633 | |
dc.identifier.issn | 0067-0049 | |
dc.identifier.other | ORCID: /0000-0002-5601-575X/work/77850135 | |
dc.identifier.uri | http://hdl.handle.net/2299/11922 | |
dc.description.abstract | We have studied ∼2100 early-type galaxies in the SDSS DR3 which have been detected by the GALEX Medium Imaging Survey (MIS), in the redshift range O <z <0.1.1. Combining GALEXUV photometry with corollary optical data from the SDSS, we find that, at a 95% confidence level, at least ∼30% of galaxies in this sample have UV to optical colors consistent with some recent star formation within the last Gyr. In particular, galaxies with an NUV - r color less than 5.5 are very likely to have experienced such recent star formation, taking into account the possibility of a contribution to NUV flux from the UV upturn phenomenon. We find quantitative agreement between the observations and the predictions of a semianalytical ACDM hierarchical merger model and deduce that early-type galaxies in the redshift range 0 <z <0.11 have ∼ 1 % -3 % of their stellar mass in stars less than 1 Gyr old. The average age of this recently formed population is ∼300-500 Myr. We also find that "monolithically" evolving galaxies, where recent star formation can be driven solely by recycled gas from stellar mass loss, cannot exhibit the blue colors (NUV - r <5.5) seen in a significant fraction (∼30%) of our observed sample. | en |
dc.format.extent | 24 | |
dc.format.extent | 1316961 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal, Supplement Series | |
dc.title | UV-optical colors as probes of early-type galaxy evolution | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre of Data Innovation Research | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=39449090424&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1086/516633 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true |