The look-back time evolution of far-ultraviolet flux from elliptical galaxies: The fornax cluster and A2670

Young Wook Lee, Chang H. Ree, R. Michael Rich, Jean Michel Deharveng, Young Jong Sohn, Soo Chang Rey, Sukyoung K. Yi, Suk Jin Yoon, Luciana Bianchi, Jae Woo Lee, Mark Seibert, Tom A. Barlow, Yong Ik Byun, Jose Donas, Karl Forster, Peter G. Friedman, Timothy M. Heckman, Myungkook J. Jee, Patrick N. Jelinsky, Sug Whan KimBarry F. Madore, Roger F. Malina, D. Christopher Martin, Bruno Milliard, Patrick Morrissey, Susan G. Neff, Jaehyon Rhee, David Schiminovich, Oswald H.W. Siegmund, Todd Small, Alex S. Szalay, Barry Y. Welsh, Ted K. Wyder

Research output: Contribution to journalArticle

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Abstract

In order to investigate the origin of the far-UV (FUV) flux from the early-type galaxies, the Galaxy Evolution Explorer is collecting the UV data for the elliptical-rich clusters at moderate redshifts (z < 0.2) where the dominant FUV source is predicted to be hot horizontal-branch (HB) stars and their post-HB progeny. Here we present our first result for the early-type galaxies in A2670 at z = 0.076. Compared to NGC 1399, a nearby giant elliptical galaxy in the Fornax Cluster, it appears that the rest-frame FUV - V color of the giant elliptical galaxies gets redder by ∼0.7 mag at the distance of A2670 (z = 0.076; look-back time ≈ 1.0 Gyr). Although a detailed comparison with the models is postponed until more cluster data are accumulated, it is interesting to note that this value is consistent with the variation predicted by the population synthesis models where the mean temperature of HB stars declines rapidly with increasing look-back time.

Original languageEnglish
Pages (from-to)L103-L106
JournalAstrophysical Journal
Volume619
Issue number1 II
DOIs
Publication statusPublished - 2005 Jan 20

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elliptical galaxies
horizontal branch stars
galaxies
progeny
hot stars
color
temperature
synthesis
comparison

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Lee, Young Wook ; Ree, Chang H. ; Rich, R. Michael ; Deharveng, Jean Michel ; Sohn, Young Jong ; Rey, Soo Chang ; Yi, Sukyoung K. ; Yoon, Suk Jin ; Bianchi, Luciana ; Lee, Jae Woo ; Seibert, Mark ; Barlow, Tom A. ; Byun, Yong Ik ; Donas, Jose ; Forster, Karl ; Friedman, Peter G. ; Heckman, Timothy M. ; Jee, Myungkook J. ; Jelinsky, Patrick N. ; Kim, Sug Whan ; Madore, Barry F. ; Malina, Roger F. ; Martin, D. Christopher ; Milliard, Bruno ; Morrissey, Patrick ; Neff, Susan G. ; Rhee, Jaehyon ; Schiminovich, David ; Siegmund, Oswald H.W. ; Small, Todd ; Szalay, Alex S. ; Welsh, Barry Y. ; Wyder, Ted K. / The look-back time evolution of far-ultraviolet flux from elliptical galaxies : The fornax cluster and A2670. In: Astrophysical Journal. 2005 ; Vol. 619, No. 1 II. pp. L103-L106.
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title = "The look-back time evolution of far-ultraviolet flux from elliptical galaxies: The fornax cluster and A2670",
abstract = "In order to investigate the origin of the far-UV (FUV) flux from the early-type galaxies, the Galaxy Evolution Explorer is collecting the UV data for the elliptical-rich clusters at moderate redshifts (z < 0.2) where the dominant FUV source is predicted to be hot horizontal-branch (HB) stars and their post-HB progeny. Here we present our first result for the early-type galaxies in A2670 at z = 0.076. Compared to NGC 1399, a nearby giant elliptical galaxy in the Fornax Cluster, it appears that the rest-frame FUV - V color of the giant elliptical galaxies gets redder by ∼0.7 mag at the distance of A2670 (z = 0.076; look-back time ≈ 1.0 Gyr). Although a detailed comparison with the models is postponed until more cluster data are accumulated, it is interesting to note that this value is consistent with the variation predicted by the population synthesis models where the mean temperature of HB stars declines rapidly with increasing look-back time.",
author = "Lee, {Young Wook} and Ree, {Chang H.} and Rich, {R. Michael} and Deharveng, {Jean Michel} and Sohn, {Young Jong} and Rey, {Soo Chang} and Yi, {Sukyoung K.} and Yoon, {Suk Jin} and Luciana Bianchi and Lee, {Jae Woo} and Mark Seibert and Barlow, {Tom A.} and Byun, {Yong Ik} and Jose Donas and Karl Forster and Friedman, {Peter G.} and Heckman, {Timothy M.} and Jee, {Myungkook J.} and Jelinsky, {Patrick N.} and Kim, {Sug Whan} and Madore, {Barry F.} and Malina, {Roger F.} and Martin, {D. Christopher} and Bruno Milliard and Patrick Morrissey and Neff, {Susan G.} and Jaehyon Rhee and David Schiminovich and Siegmund, {Oswald H.W.} and Todd Small and Szalay, {Alex S.} and Welsh, {Barry Y.} and Wyder, {Ted K.}",
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Lee, YW, Ree, CH, Rich, RM, Deharveng, JM, Sohn, YJ, Rey, SC, Yi, SK, Yoon, SJ, Bianchi, L, Lee, JW, Seibert, M, Barlow, TA, Byun, YI, Donas, J, Forster, K, Friedman, PG, Heckman, TM, Jee, MJ, Jelinsky, PN, Kim, SW, Madore, BF, Malina, RF, Martin, DC, Milliard, B, Morrissey, P, Neff, SG, Rhee, J, Schiminovich, D, Siegmund, OHW, Small, T, Szalay, AS, Welsh, BY & Wyder, TK 2005, 'The look-back time evolution of far-ultraviolet flux from elliptical galaxies: The fornax cluster and A2670', Astrophysical Journal, vol. 619, no. 1 II, pp. L103-L106. https://doi.org/10.1086/422503

The look-back time evolution of far-ultraviolet flux from elliptical galaxies : The fornax cluster and A2670. / Lee, Young Wook; Ree, Chang H.; Rich, R. Michael; Deharveng, Jean Michel; Sohn, Young Jong; Rey, Soo Chang; Yi, Sukyoung K.; Yoon, Suk Jin; Bianchi, Luciana; Lee, Jae Woo; Seibert, Mark; Barlow, Tom A.; Byun, Yong Ik; Donas, Jose; Forster, Karl; Friedman, Peter G.; Heckman, Timothy M.; Jee, Myungkook J.; Jelinsky, Patrick N.; Kim, Sug Whan; Madore, Barry F.; Malina, Roger F.; Martin, D. Christopher; Milliard, Bruno; Morrissey, Patrick; Neff, Susan G.; Rhee, Jaehyon; Schiminovich, David; Siegmund, Oswald H.W.; Small, Todd; Szalay, Alex S.; Welsh, Barry Y.; Wyder, Ted K.

In: Astrophysical Journal, Vol. 619, No. 1 II, 20.01.2005, p. L103-L106.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The look-back time evolution of far-ultraviolet flux from elliptical galaxies

T2 - The fornax cluster and A2670

AU - Lee, Young Wook

AU - Ree, Chang H.

AU - Rich, R. Michael

AU - Deharveng, Jean Michel

AU - Sohn, Young Jong

AU - Rey, Soo Chang

AU - Yi, Sukyoung K.

AU - Yoon, Suk Jin

AU - Bianchi, Luciana

AU - Lee, Jae Woo

AU - Seibert, Mark

AU - Barlow, Tom A.

AU - Byun, Yong Ik

AU - Donas, Jose

AU - Forster, Karl

AU - Friedman, Peter G.

AU - Heckman, Timothy M.

AU - Jee, Myungkook J.

AU - Jelinsky, Patrick N.

AU - Kim, Sug Whan

AU - Madore, Barry F.

AU - Malina, Roger F.

AU - Martin, D. Christopher

AU - Milliard, Bruno

AU - Morrissey, Patrick

AU - Neff, Susan G.

AU - Rhee, Jaehyon

AU - Schiminovich, David

AU - Siegmund, Oswald H.W.

AU - Small, Todd

AU - Szalay, Alex S.

AU - Welsh, Barry Y.

AU - Wyder, Ted K.

PY - 2005/1/20

Y1 - 2005/1/20

N2 - In order to investigate the origin of the far-UV (FUV) flux from the early-type galaxies, the Galaxy Evolution Explorer is collecting the UV data for the elliptical-rich clusters at moderate redshifts (z < 0.2) where the dominant FUV source is predicted to be hot horizontal-branch (HB) stars and their post-HB progeny. Here we present our first result for the early-type galaxies in A2670 at z = 0.076. Compared to NGC 1399, a nearby giant elliptical galaxy in the Fornax Cluster, it appears that the rest-frame FUV - V color of the giant elliptical galaxies gets redder by ∼0.7 mag at the distance of A2670 (z = 0.076; look-back time ≈ 1.0 Gyr). Although a detailed comparison with the models is postponed until more cluster data are accumulated, it is interesting to note that this value is consistent with the variation predicted by the population synthesis models where the mean temperature of HB stars declines rapidly with increasing look-back time.

AB - In order to investigate the origin of the far-UV (FUV) flux from the early-type galaxies, the Galaxy Evolution Explorer is collecting the UV data for the elliptical-rich clusters at moderate redshifts (z < 0.2) where the dominant FUV source is predicted to be hot horizontal-branch (HB) stars and their post-HB progeny. Here we present our first result for the early-type galaxies in A2670 at z = 0.076. Compared to NGC 1399, a nearby giant elliptical galaxy in the Fornax Cluster, it appears that the rest-frame FUV - V color of the giant elliptical galaxies gets redder by ∼0.7 mag at the distance of A2670 (z = 0.076; look-back time ≈ 1.0 Gyr). Although a detailed comparison with the models is postponed until more cluster data are accumulated, it is interesting to note that this value is consistent with the variation predicted by the population synthesis models where the mean temperature of HB stars declines rapidly with increasing look-back time.

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U2 - 10.1086/422503

DO - 10.1086/422503

M3 - Article

AN - SCOPUS:20044379726

VL - 619

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JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

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