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The Look-back Time Evolution of Far-Ultraviolet Flux from the Brightest Cluster Elliptical Galaxies at z < 0.2

Ree, Chang H. and Lee, Young-Wook and Yi, Sukyoung K. and Yoon, Suk-Jin and Rich, R. Michael and Deharveng, Jean-Michel and Sohn, Young-Jong and Kaviraj, Sugata and Rhee, Jonghwan and Sheen, Yun-Kyeong and Schawinski, Kevin and Rey, Soo-Chang and Boselli, Alessandro and Rhee, Jaehyon and Donas, José and Seibert, Mark and Wyder, Ted K. and Barlow, Tom A. and Bianchi, Luciana and Forster, Karl and Friedman, Peter G. and Heckman, Timothy M. and Madore, Barry F. and Martin, D. Christopher and Milliard, Bruno and Morrissey, Patrick and Neff, Susan G. and Schiminovich, David and Small, Todd and Szalay, Alex S. and Welsh, Barry Y. (2007) The Look-back Time Evolution of Far-Ultraviolet Flux from the Brightest Cluster Elliptical Galaxies at z < 0.2. Astrophysical Journal Supplement Series, 173 (2). pp. 607-618. ISSN 0067-0049. http://resolver.caltech.edu/CaltechAUTHORS:20100315-113445648

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Abstract

We present the GALEX UV photometry of the elliptical galaxies in Abell clusters at moderate redshifts (z < 0.2) for the study of the look-back time evolution of the UV upturn phenomenon. The brightest elliptical galaxies (M_r ≲ −22) in 12 remote clusters are compared with the nearby giant elliptical galaxies of comparable optical luminosity in the Fornax and Virgo clusters. The sample galaxies presented here appear to be quiescent without signs of massive star formation or strong nuclear activity and show smooth, extended profiles in their UV images, indicating that the far-UV (FUV) light is mostly produced by hot stars in the underlying old stellar population. Compared to their counterparts in nearby clusters, the FUV flux of cluster giant elliptical galaxies at moderate redshifts fades rapidly with ~2 Gyr of look-back time, and the observed pace in FUV − V color evolution agrees reasonably well with the prediction from the population synthesis models where the dominant FUV source is hot horizontal-branch stars and their progeny. A similar amount of color spread (~1 mag) in FUV − V exists among the brightest cluster elliptical galaxies at z ~ 0.1, as observed among the nearby giant elliptical galaxies of comparable optical luminosity.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/518125DOIArticle
http://www.iop.org/EJ/abstract/0067-0049/173/2/607PublisherArticle
ORCID:
AuthorORCID
Madore, Barry F.0000-0002-1576-1676
Additional Information:© 2007 American Astronomical Society. Print publication: Issue 2 (2007 December); received 2006 September 14; accepted for publication 2007 March 15. GALEX (Galaxy Evolution Explorer) is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASA’s support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d’Etudes Spatiales of France and the Korean Ministry of Science and Technology. Yonsei University participation was supported by the Creative Research Initiative Program of MOST/KOSEF. We are grateful to Marc Sarzi for providing his spectral fitting code, adapted for use on SDSS spectra. S. K. Y. acknowledges support by grant R01-2006-000-10716-0 from the Basic Research Program of the Korea Science and Engineering Foundation.
Group:Space Radiation Laboratory, Space Astrophysics Laboratory
Funders:
Funding AgencyGrant Number
NASAUNSPECIFIED
Centre National d’Études Spatiales (CNES)UNSPECIFIED
Ministry of Science and Technology (Korea)UNSPECIFIED
Ministry of Science and Technology (Korea)UNSPECIFIED
Korea Science and Engineering FoundationR01-2006-000-10716-0
Subject Keywords:galaxies: elliptical and lenticular, cD; galaxies: evolution; galaxies: stellar content; ultraviolet: galaxies
Issue or Number:2
Record Number:CaltechAUTHORS:20100315-113445648
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20100315-113445648
Official Citation:The Look-back Time Evolution of Far-Ultraviolet Flux from the Brightest Cluster Elliptical Galaxies at z < 0.2 Chang H. Ree, Young-Wook Lee, Sukyoung K. Yi, Suk-Jin Yoon, R. Michael Rich, Jean-Michel Deharveng, Young-Jong Sohn, Sugata Kaviraj, Jonghwan Rhee, Yun-Kyeong Sheen, Kevin Schawinski, Soo-Chang Rey, Alessandro Boselli, Jaehyon Rhee, José Donas, Mark Seibert, Ted K. Wyder, Tom A. Barlow, Luciana Bianchi, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Barry F. Madore, D. Christopher Martin, Bruno Milliard, Patrick Morrissey, Susan G. Neff, David Schiminovich, Todd Small, Alex S. Szalay, and Barry Y. Welsh 2007 ApJS 173 607-618 doi: 10.1086/518125
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:17735
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:15 Mar 2010 20:56
Last Modified:20 May 2017 04:36

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