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 ForsterPeter 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, Barry Y. Welsh

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Abstract

We present the GALEXUV 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.

Original languageEnglish
Pages (from-to)607-618
Number of pages12
JournalAstrophysical Journal, Supplement Series
Volume173
Issue number2
DOIs
Publication statusPublished - 2007 Dec 1

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elliptical galaxies
hot stars
prediction
luminosity
horizontal branch stars
color
progeny
massive stars
photometry
star formation
galaxies
synthesis
profiles
predictions

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Ree, Chang H. ; Lee, Young Wook ; Yi, Sukyoung K. ; Yoon, Suk Jin ; Rich, R. Michael ; Deharveng, Jean Michel ; Sohn, Young Jong ; Kaviraj, Sugata ; Rhee, Jonghwan ; Sheen, Yun Kyeong ; Schawinski, Kevin ; Rey, Soo Chang ; Boselli, Alessandro ; Rhee, Jaehyon ; Donas, José ; Seibert, Mark ; Wyder, Ted K. ; Barlow, Tom A. ; Bianchi, Luciana ; Forster, Karl ; Friedman, Peter G. ; Heckman, Timothy M. ; Madore, Barry F. ; Martin, D. Christopher ; Milliard, Bruno ; Morrissey, Patrick ; Neff, Susan G. ; Schiminovich, David ; Small, Todd ; Szalay, Alex S. ; Welsh, Barry Y. / The look-back time evolution of far-ultraviolet flux from the brightest cluster elliptical galaxies at z < 0.2. In: Astrophysical Journal, Supplement Series. 2007 ; Vol. 173, No. 2. pp. 607-618.
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title = "The look-back time evolution of far-ultraviolet flux from the brightest cluster elliptical galaxies at z < 0.2",
abstract = "We present the GALEXUV 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.",
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Ree, CH, Lee, YW, Yi, SK, Yoon, SJ, Rich, RM, Deharveng, JM, Sohn, YJ, Kaviraj, S, Rhee, J, Sheen, YK, Schawinski, K, Rey, SC, Boselli, A, Rhee, J, Donas, J, Seibert, M, Wyder, TK, Barlow, TA, Bianchi, L, Forster, K, Friedman, PG, Heckman, TM, Madore, BF, Martin, DC, Milliard, B, Morrissey, P, Neff, SG, Schiminovich, D, Small, T, Szalay, AS & Welsh, BY 2007, 'The look-back time evolution of far-ultraviolet flux from the brightest cluster elliptical galaxies at z < 0.2', Astrophysical Journal, Supplement Series, vol. 173, no. 2, pp. 607-618. https://doi.org/10.1086/518125

The look-back time evolution of far-ultraviolet flux from the brightest cluster elliptical galaxies at z < 0.2. / Ree, Chang H.; Lee, Young Wook; Yi, Sukyoung K.; Yoon, Suk Jin; Rich, R. Michael; Deharveng, Jean Michel; Sohn, Young Jong; Kaviraj, Sugata; Rhee, Jonghwan; Sheen, Yun Kyeong; Schawinski, Kevin; Rey, Soo Chang; Boselli, Alessandro; Rhee, Jaehyon; Donas, José; Seibert, Mark; Wyder, Ted K.; Barlow, Tom A.; Bianchi, Luciana; Forster, Karl; Friedman, Peter G.; Heckman, Timothy M.; Madore, Barry F.; Martin, D. Christopher; Milliard, Bruno; Morrissey, Patrick; Neff, Susan G.; Schiminovich, David; Small, Todd; Szalay, Alex S.; Welsh, Barry Y.

In: Astrophysical Journal, Supplement Series, Vol. 173, No. 2, 01.12.2007, p. 607-618.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The look-back time evolution of far-ultraviolet flux from the brightest cluster elliptical galaxies at z < 0.2

AU - Ree, Chang H.

AU - Lee, Young Wook

AU - Yi, Sukyoung K.

AU - Yoon, Suk Jin

AU - Rich, R. Michael

AU - Deharveng, Jean Michel

AU - Sohn, Young Jong

AU - Kaviraj, Sugata

AU - Rhee, Jonghwan

AU - Sheen, Yun Kyeong

AU - Schawinski, Kevin

AU - Rey, Soo Chang

AU - Boselli, Alessandro

AU - Rhee, Jaehyon

AU - Donas, José

AU - Seibert, Mark

AU - Wyder, Ted K.

AU - Barlow, Tom A.

AU - Bianchi, Luciana

AU - Forster, Karl

AU - Friedman, Peter G.

AU - Heckman, Timothy M.

AU - Madore, Barry F.

AU - Martin, D. Christopher

AU - Milliard, Bruno

AU - Morrissey, Patrick

AU - Neff, Susan G.

AU - Schiminovich, David

AU - Small, Todd

AU - Szalay, Alex S.

AU - Welsh, Barry Y.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - We present the GALEXUV 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.

AB - We present the GALEXUV 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.

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