2011A&A...526A.114T

Query : 2011A&A...526A.114T

2011A&A...526A.114T - Astronomy and Astrophysics, volume 526A114-114 (2011/2-1)

Formation and evolution of dwarf early-type galaxies in the Virgo cluster. I. Internal kinematics.

TOLOBA E., BOSELLI A., CENARRO A.J., PELETIER R.F., GORGAS J., GIL DE PAZ A. and MUNOZ-MATEOS J.C.

Abstract (from CDS):

We present new medium resolution kinematic data for a sample of 21 dwarf early-type galaxies (dEs) mainly in the Virgo cluster, obtained with the WHT and INT telescopes at the Roque de los Muchachos Observatory (La Palma, Spain). These data are used to study the origin of the dwarf elliptical galaxy population inhabiting clusters. We confirm that dEs are not dark matter dominated galaxies, at least not up to the half-light radius. We also find that the observed galaxies in the outer parts of the cluster are mostly rotationally supported systems with disky morphological shapes. Rotationally supported dEs have rotation curves similar to those of star-forming galaxies of similar luminosity and follow the Tully-Fisher relation. This is expected if dE galaxies are the descendants of low-luminosity star-forming systems that have recently entered the cluster environment and lost their gas due to a ram-pressure stripping event, quenching their star formation activity and transforming into quiescent systems, but conserving their angular momentum.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: Virgo - galaxies: dwarf - galaxies: elliptical and lenticular, cD - galaxies: kinematics and dynamics - galaxies: evolution - galaxies: formation

VizieR on-line data: <Available at CDS (J/A+A/526/A114): table2.dat table3.dat>

Simbad objects: 30

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Number of rows : 30
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 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME M31 Group GrG 00 47 28.6 +40 17 23           ~ 65 0
4 LEDA 1007217 AG? 02 41 35.145 -08 10 24.33   15.96   14.96   ~ 15 0
5 2MASX J02420036+0000531 Sy1 02 42 00.369 +00 00 53.13           ~ 13 0
6 NGC 3073 EmG 10 00 52.0678224264 +55 37 07.881619152 14.12 14.07 13.40     ~ 201 2
7 NAME Virgo E Cloud GrG 12 03 +12.4           ~ 21 0
8 IC 3025 GiG 12 10 23.189 +10 11 18.62   15.3       ~ 84 0
9 IC 3131 AG? 12 18 50.9006616648 +07 51 43.066744308   14.8       ~ 74 0
10 Z 42-31 GiG 12 20 12.1876857240 +06 37 23.506336596   15.4       ~ 36 0
11 NGC 4306 GiP 12 22 04.087 +12 47 13.96   14.4       ~ 113 0
12 IC 3328 GiP 12 25 57.9238048368 +10 03 13.552350912   14.9       ~ 172 0
13 IC 3344 GiG 12 26 32.3896963032 +13 34 43.544246304   15.2       ~ 66 0
14 IC 3369 GiG 12 27 16.9345517640 +16 01 28.169699412   15.1       ~ 58 0
15 NAME Virgo N Cloud Cld 12 28 +16.3           ~ 14 0
16 IC 3381 LSB 12 28 14.8698618648 +11 47 23.359165728   14.42       ~ 173 1
17 IC 3393 GiG 12 28 41.7047406696 +12 54 57.265958916   14.85 14.24   13.19 ~ 117 1
18 IC 3413 GiG 12 29 22.5171098280 +11 26 01.955382504   15.2       ~ 82 0
19 NGC 4482 GiG 12 30 10.3245430152 +10 46 46.088237784   14.2       ~ 182 0
20 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
21 NAME Virgo A Cluster GrG 12 30 49.2 +12 23 30           ~ 154 0
22 IC 3470 GiP 12 32 23.353 +11 15 47.56   15.0       ~ 125 0
23 NAME Vir B Cluster GrG 12 33 39.3 +10 10 57           ~ 143 0
24 NAME Virgo S Cloud GrG 12 34 +06.1           ~ 29 0
25 IC 3510 GiG 12 34 14.8201884552 +11 04 17.432673708   15.2       ~ 66 0
26 IC 3586 GiG 12 36 54.858 +12 31 12.49   15.3       ~ 114 0
27 IC 3652 GiG 12 40 58.5602846328 +11 11 04.080925212   15.1       ~ 127 0
28 IC 809 GiG 12 42 08.6673855720 +11 45 15.438923748   15.1       ~ 118 0
29 IC 810 GiG 12 42 09.0797376720 +12 35 48.515221536   14.7     12.2 ~ 60 0
30 Z 43-3 GiG 12 42 56.3359175976 +03 40 35.752436760   15.1       ~ 54 0

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