2007ApJ...670L.101M

Query : 2007ApJ...670L.101M

2007ApJ...670L.101M - Astrophys. J., 670, L101-L104 (2007/December-1)

Toward a solution for the Ca II triplet puzzle: results from dwarf elliptical galaxies.

MICHIELSEN D., KOLEVA M., PRUGNIEL P., ZEILINGER W.W., DE RIJCKE S., DEJONGHE H., PASQUALI A., FERRERAS I. and DEBATTISTA V.P.

Abstract (from CDS):

We present new estimates of ages and metallicities, based on VLT FORS optical (4400-5500 Å) spectroscopy, of 16 dwarf elliptical galaxies (dE's) in the Fornax Cluster and in southern groups. These dE's are more metal-rich and younger than previous estimates based on narrowband photometry and low-resolution spectroscopy. For our sample we find a mean metallicity [Z/H]=-0.33 dex and mean age 3.5 Gyr, consistent with similar samples of dE's in other environments (Local Group, Virgo). Three dE's in our sample show emission lines and very young ages. This suggests that some dE's formed stars until a very recent epoch and were self-enriched by a long star formation history. Previous observations of large near-infrared (∼8500 Å) Ca II absorption strengths in these dE's are in good agreement with the new metallicity estimates, solving part of the so-called calcium puzzle.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Dwarf - Galaxies: Fundamental Parameters - Galaxies: Stellar Content

CDS comments: table 1 : Objects FS are [FS90] Antlia NNN, DW 1 and DW 2 not identified

Simbad objects: 22

goto Full paper

goto View the references in ADS

Number of rows : 22
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 IC 1919 GiG 03 26 02.2132576776 -32 53 40.323783768   13.78   12.60   ~ 86 0
2 2MASX J03262503-3707417 GiC 03 26 25.0085720520 -37 07 41.543028444   16.09       ~ 43 0
3 MCG-06-08-027 EmG 03 34 29.4927803424 -35 32 47.329271916   14.50       ~ 95 1
4 2MASX J03352407-3621496 GiC 03 35 24.0910651464 -36 21 49.743672768   15.90       ~ 38 0
5 MCG-06-09-011 GiG 03 38 13.5999606360 -33 07 37.960332924   15.26   13.94   ~ 58 0
6 LEDA 74808 EmG 03 38 19.265 -35 07 44.74   15.60 15.34     ~ 65 0
7 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
8 LEDA 74879 GiC 03 40 33.86 -35 01 21.4   15.73   15.54   ~ 46 0
9 2MASX J03414141-3510119 GiC 03 41 41.410 -35 10 11.99   15.70       ~ 41 1
10 ESO 358-56 GiP 03 43 22.631 -33 56 25.30   15.58   14.33   ~ 61 0
11 MCG-06-23-029 EmG 10 27 02.497 -36 13 41.54   14.56   13.15   ~ 62 1
12 LEDA 82999 GiG 10 28 12.1 -35 32 31   18.5       ~ 7 0
13 LEDA 83000 GiG 10 28 13.6 -35 35 53   18.9       ~ 5 0
14 MCG-06-23-034 GiG 10 29 11.0589500280 -35 41 16.663424100   15       ~ 13 0
15 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
16 2MASX J10372287-3521371 GiG 10 37 22.8528128184 -35 21 37.442915244   15.6       ~ 19 0
17 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
18 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 531 0
19 LEDA 792560 AG? 15 18 13.0289649360 -24 11 46.002108984   15.66       ~ 11 0
20 NGC 5898 EmG 15 18 13.5683042256 -24 05 52.428845076   12.37 11.52 10.71   ~ 155 1
21 LEDA 792714 AG? 15 18 44.7133964184 -24 10 51.454756020   16.10       ~ 10 0
22 NAME Local Group GrG ~ ~           ~ 9325 0

To bookmark this query, right click on this link: simbad:objects in 2007ApJ...670L.101M and select 'bookmark this link' or equivalent in the popup menu