2005ApJ...619L.103L

Query : 2005ApJ...619L.103L

2005ApJ...619L.103L - Astrophys. J., 619, L103-L106 (2005/January-3)

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

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., KIM S.-W., MADORE B.F., MALINA R.F., MARTIN D.C., MILLIARD B., MORRISSEY P., NEFF S.G., RHEE J., SCHIMINOVICH D., SIEGMUND O.H.W., SMALL T., SZALAY A.S., WELSH B.Y. and WYDER T.K.

Abstract (from CDS):

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.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Evolution - Galaxies: Stellar Content - Ultraviolet: Galaxies

CDS comments: Parag. 3 : Galaxy 375 in CLG 1358+62 = [FFF98] 375, DG 269 in ClG 0016+16 = [DG92] 8-269, in fig.1 the galaxies are [FBD2002] ACO 2670 aNN

Simbad objects: 24

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Number of rows : 24

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	ClG 0016+16	ClG	00 18 33.3	+16 26 36						~	517	0
2	CNOC MS 0015 101010	GiC	00 18 33.83	+16 26 20.3						~	10	0
3	ACO 370	ClG	02 39 50.5	-01 35 08						~	825	0
4	NGC 1379	GiP	03 36 03.9668625792	-35 26 28.547476800	12.17	12.04	10.91	10.60		~	277	1
5	NGC 1381	GiP	03 36 31.6592184144	-35 17 42.739221912	12.90	12.47	11.50	11.02		~	269	1
6	NGC 1387	Sy2	03 36 57.0337458600	-35 30 23.675934060	12.18	11.75	10.69	10.16		~	290	1
7	NGC 1382	GiP	03 37 08.9722655064	-35 11 41.995386996	13.19	13.79	12.92	12.31		~	135	1
8	NGC 1389	EmG	03 37 11.7427350576	-35 44 45.873195000	12.80	12.39	11.50	10.99		~	208	1
9	NGC 1399	rG	03 38 29.083	-35 27 02.67	11.05	9.74	9.59	8.12		~	1636	1
10	ACO S 373	ClG	03 38 29.4	-35 27 08						~	2029	0
11	NGC 1404	rG	03 38 51.917	-35 35 39.81	11.53	10.69	10.00	9.03		~	787	1
12	SDSS J135950.56+623105.3	rG	13 59 50.571	+62 31 05.16		19.94	19.05	17.80	17.11	~	28	2
13	ZwCl 1358+6245	ClG	13 59 54.3	+62 30 36			18.5			~	370	0
14	2MASX J23540639-1025279	GiC	23 54 06.3674869248	-10 25 27.429324456		17.42				~	10	0
15	2dFGRS TGS888Z065	GiC	23 54 06.99	-10 24 18.9		18.506		17.089		~	3	0
16	2MASXI J2354070-102516	GiC	23 54 07.0310971152	-10 25 16.758946128						~	8	0
17	ACO 2670	ClG	23 54 10.51	-10 23 06.8						~	364	0
18	2MASX J23541371-1025084	LIN	23 54 13.6827414192	-10 25 08.481024912		15.32				~	55	2
19	2MASX J23541574-1026304	GiC	23 54 15.7196636736	-10 26 30.487394688						~	6	0
20	2MASX J23541716-1024564	GiC	23 54 17.1526819632	-10 24 56.450237256						~	8	0
21	2MASX J23541730-1025594	GiC	23 54 17.2848551856	-10 25 58.906659972						~	8	0
22	2MASX J23541812-1024554	GiC	23 54 18.0879514488	-10 24 55.572913584						~	8	0
23	NVSS J235418-102504	rG	23 54 18.4211221704	-10 25 08.924958732		17.59		16.13		~	10	0
24	2dFGRS TGS888Z013	GiC	23 54 21.5092853256	-10 25 10.847832384		17.69		15.955		~	10	0

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