UV properties of early-type galaxies in the Virgo Cluster

被引:78
作者
Boselli, A
Cortese, L
Deharveng, JM
Gavazzi, G
Yi, KS
de Paz, AG
Seibert, M
Boissier, S
Donas, J
Lee, YW
Madore, BF
Martin, DC
Rich, RM
Sohn, YJ
机构
[1] Lab Astrophys Marseille, F-13376 Marseille, France
[2] Univ Milano Bicocca, I-20126 Milan, Italy
[3] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England
[4] Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
[5] CALTECH, NASA IPAC Extragalact Database, Pasadena, CA 91125 USA
[6] Yonsei Univ, Ctr Space Astrophys, Seoul 120749, South Korea
[7] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
关键词
galaxies : clusters : individual (Virgo); galaxies : elliptical and lenticular; cD; galaxies : evolution; ultraviolet : galaxies;
D O I
10.1086/444534
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study the UV properties of a volume-limited sample of early-type galaxies in the Virgo Cluster combining new GALEX far-ultraviolet (1530 angstrom) and near-ultraviolet (2310 angstrom) data with spectrophotometric data available at other wavelengths. The sample includes 264 elliptical, lenticular, and dwarf galaxies spanning a large range in luminosity (M-B greater than or equal to - 15). While the NUV to optical or near-IR color-magnitude relations (CMRs) are similar to those observed at optical wavelengths, with a monotonic reddening of the color index with increasing luminosity, the (FUV - V) and (FUV - H) CMRs show a discontinuity between massive and dwarf objects. An even more pronounced dichotomy is observed in the (FUV - NUV) CMR. For elliptical galaxies, the (FUV - NUV) color becomes bluer with increasing luminosity and with increasing reddening of the optical or near-IR color indices. For the dwarfs, the opposite trend is observed. These observational evidences are consistent with the idea that the UV emission is dominated by hot, evolved stars in giant systems, while in dwarf ellipticals residual star formation activity is more common.
引用
收藏
页码:L29 / L32
页数:4
相关论文
共 38 条
[1]   Early-type galaxies in the Sloan Digital Sky Survey. I. The sample [J].
Bernardi, M ;
Sheth, RK ;
Annis, J ;
Burles, S ;
Eisenstein, DJ ;
Finkbeiner, DP ;
Hogg, D ;
Lupton, RH ;
Schlegel, DJ ;
SubbaRao, M ;
Bahcall, NA ;
Blakeslee, JP ;
Brinkmann, J ;
Castander, FJ ;
Connolly, AJ ;
Csabai, I ;
Doi, M ;
Fukugita, M ;
Frieman, J ;
Heckman, T ;
Hennessy, GS ;
Ivezic, Z ;
Knapp, GR ;
Lamb, DQ ;
McKay, T ;
Munn, JA ;
Nichol, R ;
Okamura, S ;
Schneider, DP ;
Thakar, AR ;
York, DG .
ASTRONOMICAL JOURNAL, 2003, 125 (04) :1817-1848
[2]   Redshift-distance survey of early-type galaxies.: I.: The ENEARc cluster sample [J].
Bernardi, M ;
Alonso, MV ;
da Costa, LN ;
Willmer, CNA ;
Wegner, G ;
Pellegrini, PS ;
Rité, C ;
Maia, MAG .
ASTRONOMICAL JOURNAL, 2002, 123 (06) :2990-3017
[3]   STUDIES OF THE VIRGO CLUSTER .2. A CATALOG OF 2096 GALAXIES IN THE VIRGO CLUSTER AREA [J].
BINGGELI, B ;
SANDAGE, A ;
TAMMANN, GA .
ASTRONOMICAL JOURNAL, 1985, 90 (09) :1681-1758
[4]   GALEX ultraviolet observations of the interacting galaxy NGC 4438 in the Virgo Cluster [J].
Boselli, A ;
Boissier, S ;
Cortese, L ;
de Paz, AG ;
Buat, V ;
Iglesias-Paramo, J ;
Madore, BF ;
Barlow, T ;
Bianchi, L ;
Byun, YI ;
Donas, J ;
Forster, K ;
Friedman, PG ;
Heckman, TM ;
Jelinsky, P ;
Lee, YW ;
Malina, R ;
Martin, DC ;
Milliard, B ;
Morrissey, P ;
Neff, S ;
Rich, RM ;
Schiminovich, D ;
Seibert, M ;
Siegmund, O ;
Small, T ;
Szalay, AS ;
Welsh, B ;
Wyder, TK .
ASTROPHYSICAL JOURNAL, 2005, 623 (01) :L13-L16
[5]   UV to radio centimetric spectral energy distributions of optically-selected late-type galaxies in the Virgo cluster [J].
Boselli, A ;
Gavazzi, G ;
Sanvito, G .
ASTRONOMY & ASTROPHYSICS, 2003, 402 (01) :37-51
[6]   1.65 Micron (H band) surface photometry of galaxies.: VI.: The history of star formation in normal late-type galaxies [J].
Boselli, A ;
Gavazzi, G ;
Donas, J ;
Scodeggio, M .
ASTRONOMICAL JOURNAL, 2001, 121 (02) :753-767
[7]   SPECTROPHOTOMETRIC EVOLUTION OF ELLIPTIC GALAXIES .1. ULTRAVIOLET EXCESS AND COLOR-MAGNITUDE-REDSHIFT RELATIONS [J].
BRESSAN, A ;
CHIOSI, C ;
FAGOTTO, F .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1994, 94 (01) :63-115
[8]   THE FAR-ULTRAVIOLET SPECTRA OF EARLY-TYPE GALAXIES [J].
BURSTEIN, D ;
BERTOLA, F ;
BUSON, LM ;
FABER, SM ;
LAUER, TR .
ASTROPHYSICAL JOURNAL, 1988, 328 (02) :440-462
[9]   Star formation histories of early-type galaxies. I. Higher order Balmer lines as age indicators [J].
Caldwell, N ;
Rose, JA ;
Concannon, KD .
ASTRONOMICAL JOURNAL, 2003, 125 (06) :2891-2926
[10]   The far-ultraviolet emission of early-type galaxies [J].
Deharveng, JM ;
Boselli, A ;
Donas, J .
ASTRONOMY & ASTROPHYSICS, 2002, 393 (03) :843-854