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

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

2011A&A...526A.114T - Astronomy and Astrophysics, volume 526A, 114-114 (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

Full paper

View the references in ADS

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 - 2024	#notes
1	M 32	GiG	00 42 41.82480	+40 51 54.6120	9.51	9.03	8.08			~	2139	2
2	M 31	AGN	00 42 44.330	+41 16 07.50	4.86	4.36	3.44			~	12475	1
3	NAME M31 Group	GrG	00 47 28.6	+40 17 23						~	63	0
4	LEDA 1007217	AG?	02 41 35.145	-08 10 24.33		15.96		14.96		~	13	0
5	2MASX J02420036+0000531	Sy1	02 42 00.369	+00 00 53.13						~	10	0
6	NGC 3073	GiP	10 00 52.0678224264	+55 37 07.881619152	14.12	14.07	13.40			~	188	2
7	NAME Virgo E Cloud	GrG	12 03	+12.4						~	20	0
8	IC 3025	GiG	12 10 23.189	+10 11 18.62		15.3				~	80	0
9	IC 3131	AG?	12 18 50.9006616648	+07 51 43.066744308		14.8				~	64	0
10	2MASX J12201221+0637231	GiG	12 20 12.1876857240	+06 37 23.506336596		15.4				~	32	0
11	NGC 4306	GiP	12 22 04.087	+12 47 13.96		14.4				~	105	0
12	IC 3328	GiP	12 25 57.9238048368	+10 03 13.552350912		14.9				~	156	0
13	NAME Virgo Cluster	ClG	12 26 32.1	+12 43 24						~	6551	0
14	IC 3344	GiG	12 26 32.3896963032	+13 34 43.544246304		15.2				~	62	0
15	IC 3369	GiG	12 27 16.9345517640	+16 01 28.169699412		15.1				~	51	0
16	NAME Virgo N Cloud	GrG	12 28	+16.3						~	14	0
17	IC 3381	LSB	12 28 14.8698618648	+11 47 23.359165728		14.42				~	162	1
18	IC 3393	GiG	12 28 41.7047406696	+12 54 57.265958916		14.85	14.24		13.19	~	107	1
19	IC 3413	GiG	12 29 22.5171098280	+11 26 01.955382504		15.2				~	75	0
20	NAME Vir B Cluster	GrG	12 29.8	+08 00						~	132	0
21	NGC 4482	GiG	12 30 10.3245430152	+10 46 46.088237784		14.2				~	167	0
22	NAME Virgo A Cluster	ClG	12 30 49.2	+12 23 30						~	139	0
23	IC 3470	GiP	12 32 23.353	+11 15 47.56		15.0				~	113	0
24	NAME Virgo S Cloud	GrG	12 34	+06.1						~	27	0
25	IC 3510	GiG	12 34 14.8201884552	+11 04 17.432673708		15.2				~	61	0
26	IC 3586	GiG	12 36 54.858	+12 31 12.49		15.3				~	101	0
27	IC 3652	GiG	12 40 58.5602846328	+11 11 04.080925212		15.1				~	112	0
28	IC 3672	GiG	12 42 08.6673855720	+11 45 15.438923748		15.1				~	108	0
29	IC 810	GiG	12 42 09.0797376720	+12 35 48.515221536		14.7			12.2	~	55	0
30	2MASX J12425631+0340355	GiG	12 42 56.3359175976	+03 40 35.752436760		15.1				~	49	0

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