Galex uv observations of elliptical galaxies in abell clusters at z < 0.2

GALEX Science Team

Research output: Contribution to journalConference article

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 (Mr < −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 Gyrs 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.

Original languageEnglish
Pages (from-to)75-81
Number of pages7
JournalAstrophysics and Space Science Proceedings
Issue number202439
DOIs
Publication statusPublished - 2009 Jan 1
EventInternational Conference on Ultraviolet Properties of Evolved Stellar Populations, 2007 - Puerto Vallarta, Mexico
Duration: 2007 Apr 162007 Apr 20

Fingerprint

Galaxies
elliptical galaxies
hot stars
Stars
prediction
luminosity
Luminance
horizontal branch stars
color
progeny
Color
Photometry
massive stars
photometry
star formation
Ultraviolet radiation
galaxies
Fluxes
synthesis
profiles

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Computer Science Applications
  • Spectroscopy
  • Space and Planetary Science
  • Nuclear and High Energy Physics

Cite this

@article{f2286836407b4a9b91872a62197aac56,
title = "Galex uv observations of elliptical galaxies in abell clusters at z < 0.2",
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 (Mr < −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 Gyrs 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.",
author = "{GALEX Science Team} and Ree, {Chang H.} and Lee, {Young Wook} and Sukyoung Yi and Yoon, {Suk Jin}",
year = "2009",
month = "1",
day = "1",
doi = "10.1007/978-0-387-87621-4_10",
language = "English",
pages = "75--81",
journal = "Astrophysics and Space Science Proceedings",
issn = "1570-6591",
number = "202439",

}

Galex uv observations of elliptical galaxies in abell clusters at z < 0.2. / GALEX Science Team.

In: Astrophysics and Space Science Proceedings, No. 202439, 01.01.2009, p. 75-81.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Galex uv observations of elliptical galaxies in abell clusters at z < 0.2

AU - GALEX Science Team

AU - Ree, Chang H.

AU - Lee, Young Wook

AU - Yi, Sukyoung

AU - Yoon, Suk Jin

PY - 2009/1/1

Y1 - 2009/1/1

N2 - 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 (Mr < −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 Gyrs 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.

AB - 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 (Mr < −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 Gyrs 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.

UR - http://www.scopus.com/inward/record.url?scp=85033598227&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85033598227&partnerID=8YFLogxK

U2 - 10.1007/978-0-387-87621-4_10

DO - 10.1007/978-0-387-87621-4_10

M3 - Conference article

AN - SCOPUS:85033598227

SP - 75

EP - 81

JO - Astrophysics and Space Science Proceedings

JF - Astrophysics and Space Science Proceedings

SN - 1570-6591

IS - 202439

ER -