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 Kim; Barry 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

doi:10.1086/422503

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

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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 language	English
Pages (from-to)	L103-L106
Journal	Astrophysical Journal
Volume	619
Issue number	1 II
DOIs	https://doi.org/10.1086/422503
Publication status	Published - 2005 Jan 20

Bibliographical note

Funding Information:
GALEX 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 is funded by the Korean Ministry of Science and Technology, for which we are grateful. J.-W. L. also acknowledges support from KOSEF to the ARCSEC.

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/422503

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Lee, Y. W., Ree, C. H., Rich, R. M., Deharveng, J. M., Sohn, Y. J., Rey, S. C., Yi, S. K., Yoon, S. J., Bianchi, L., Lee, J. W., Seibert, M., Barlow, T. A., Byun, Y. I., Donas, J., Forster, K., Friedman, P. G., Heckman, T. M., Jee, M. J., Jelinsky, P. N., ... Wyder, T. K. (2005). The look-back time evolution of far-ultraviolet flux from elliptical galaxies: The fornax cluster and A2670. Astrophysical Journal, 619(1 II), L103-L106. https://doi.org/10.1086/422503

@article{5c1ea42c32534f7db1c0b34694d0e048,

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.",

keywords = "Galaxies: evolution, Galaxies: stellar content, Ultraviolet: galaxies",

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.}",

note = "Funding Information: GALEX is a NASA Small Explorer, launched in 2003 April. We gratefully acknowledge NASA{\textquoteright}s support for construction, operation, and science analysis for the GALEX mission, developed in cooperation with the Centre National d{\textquoteright}Etudes Spatiales of France and the Korean Ministry of Science and Technology. Yonsei University participation is funded by the Korean Ministry of Science and Technology, for which we are grateful. J.-W. L. also acknowledges support from KOSEF to the ARCSEC.",

year = "2005",

month = jan,

day = "20",

doi = "10.1086/422503",

language = "English",

volume = "619",

pages = "L103--L106",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1 II",

}

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

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.

N1 - Funding Information: GALEX 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 is funded by the Korean Ministry of Science and Technology, for which we are grateful. J.-W. L. also acknowledges support from KOSEF to the ARCSEC.

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.

KW - Galaxies: evolution

KW - Galaxies: stellar content

KW - Ultraviolet: galaxies

UR - http://www.scopus.com/inward/record.url?scp=20044379726&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20044379726&partnerID=8YFLogxK

U2 - 10.1086/422503

DO - 10.1086/422503

M3 - Article

AN - SCOPUS:20044379726

SN - 0004-637X

VL - 619

SP - L103-L106

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 II

ER -

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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