2015MNRAS.453.3635P

Query : 2015MNRAS.453.3635P

2015MNRAS.453.3635P - Mon. Not. R. Astron. Soc., 453, 3635-3648 (2015/November-2)

The scaling relations of early-type dwarf galaxies across a range of environments.

PENNY S.J., JANZ J., FORBES D.A., BENSON A.J. and MOULD J.

Abstract (from CDS):

We present the results of a Keck-ESI study of dwarf galaxies across a range of environment: the Perseus Cluster, the Virgo Cluster, the NGC 1407 group, and the NGC 1023 group. 18 dwarf ellipticals (dEs) are targeted for spectroscopy, three for the first time. We confirm cluster membership for one Virgo dE, and group membership for one dE in the NGC 1023 group, and one dE in the NGC 1407 group for the first time. Regardless of environment, the dEs follow the same size-magnitude and σ-luminosity relation. Two of the Virgo dwarfs, VCC 1199 and VCC 1627, have among the highest central velocity dispersions (σ0 = 58.4 and 49.2 km/s) measured for dwarfs of their luminosity (MR ~ -17). Given their small sizes (Re < 300 pc) and large central velocity dispersions, we classify these two dwarfs as compact ellipticals (cEs) rather than dEs. Group dEs typically have higher mean dynamical-to-stellar mass ratios than the cluster dEs, with Mdyn/M{sstarf} = 5.1±0.6 for the group dwarfs, versus Mdyn/M{sstarf} = 2.2±0.5 for the cluster sample, which includes two cEs. We also search for trends in Mdyn/M{sstarf} versus distance from M87 for the Virgo Cluster population, and find no preference for dwarfs with high values of Mdyn/M{sstarf} to reside in the cluster outskirts dyn centre.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: dwarf - galaxies: evolution - galaxies: kinematics and dynamics

Simbad objects: 38

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Number of rows : 38
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 110 GiG 00 40 22.0572349992 +41 41 07.507220136   8.92 8.07     ~ 1370 1
2 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
3 MCG+07-05-040 AG? 02 21 13.40 +42 45 45.7   11.26   14.38   ~ 46 0
4 LEDA 2802360 G 02 37 18.6 +38 55 59       14.92   ~ 6 0
5 NAME NGC 1023 Group GrG 02 39 37.9 +39 20 51           ~ 81 0
6 NGC 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
7 MCG+06-06-074 GiG 02 41 15.50 +38 44 36.0   16.0   13.70   ~ 14 0
8 SDSS J031927.00+412716.6 GiC 03 19 27.00384 +41 27 16.6176   18.48       ~ 7 0
9 SDSS J031931.38+412629.1 GiC 03 19 31.38984 +41 26 29.1444   18.72       ~ 7 0
10 GALEXASC J031939.68+413105.6 G 03 19 40.0 +41 31 00           ~ 8 0
11 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
12 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
13 NAME NGC 1400 Group GrG 03 32 16.00 -18 33 54.0           ~ 75 0
14 LEDA 74820 LSB 03 38 42.09 -18 53 58.3   16.7       ~ 7 0
15 LEDA 74838 GiG 03 39 23.12 -18 45 30.3   16.67       ~ 8 0
16 LEDA 857594 LSB 03 39 33.89 -19 15 58.9   18.5       ~ 5 0
17 NGC 1407 rG 03 40 11.904 -18 34 49.36   10.64 9.67 9.13   ~ 613 2
18 LEDA 74892 LSB 03 40 49.68 -18 50 50.2   18.2       ~ 8 0
19 MCG-03-10-036 GiG 03 41 56.0791895376 -18 53 42.775179108   14.22   13.03   ~ 37 0
20 LEDA 74962 LSB 03 44 10.7 -17 49 59   16.7       ~ 6 0
21 MCG+03-31-071 AG? 12 12 18.984 +15 28 59.13   16.02       ~ 25 0
22 UGC 7269 AG? 12 15 40.0915388520 +15 00 19.781490924   16.25       ~ 27 0
23 NGC 4306 GiP 12 22 04.087 +12 47 13.96   14.4       ~ 113 0
24 NGC 4309A GiP 12 22 14.7398629440 +07 10 01.648488468           ~ 70 0
25 LEDA 41103 G 12 28 59.2560796560 +07 31 35.260815396   17.53 16.63     ~ 14 0
26 LEDA 41180 AG? 12 29 34.9891966080 +08 03 28.781563608           ~ 91 0
27 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
28 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
29 NAME Virgo A Cluster GrG 12 30 49.2 +12 23 30           ~ 154 0
30 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
31 IC 798 GiG 12 32 33.4026417888 +15 24 55.432700280   15.3       ~ 108 0
32 2MASX J12353723+1222554 GiP 12 35 37.2512550384 +12 22 55.234598772   15.41       ~ 103 0
33 IC 3633 GiG 12 40 11.2491451848 +09 53 46.054801392   15.4       ~ 82 0
34 Z 70-221 AG? 12 41 54.6006433776 +09 35 04.532490168   15.3       ~ 42 0
35 Z 71-21 AG? 12 44 11.982 +12 56 30.64   15.3       ~ 73 0
36 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
37 NGC 5139 GlC 13 26 47.28 -47 28 46.1           ~ 3677 0
38 NAME Local Group GrG ~ ~           ~ 9325 0

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