2012A&A...548A..78T


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.28CET06:47:41

2012A&A...548A..78T - Astronomy and Astrophysics, volume 548A, 78-78 (2012/12-1)

Formation and evolution of dwarf early-type galaxies in the Virgo cluster. II. Kinematic scaling relations.

TOLOBA E., BOSELLI A., PELETIER R.F., FALCON-BARROSO J., VAN DE VEN G. and GORGAS J.

Abstract (from CDS):

We place our sample of 18 Virgo dwarf early-type galaxies (dEs) on the (V-K)e-velocity dispersion, Faber-Jackson, and fundamental plane (FP) scaling relations for massive early-type galaxies (Es). We use a generalized velocity dispersion, which includes rotation, to be able to compare the location of both rotationally and pressure supported dEs with those of early and late-type galaxies. We find that dEs seem to bend the Faber-Jackson relation of Es to lower velocity dispersions, being the link between Es and dwarf spheroidal galaxies (dSphs). Regarding the FP relation, we find that dEs are significantly offset with respect to massive hot stellar systems, and re-casting the FP into the so-called κ-space suggests that this offset is related to dEs having a total mass-to-light ratio higher than Es but still significantly lower than dSph galaxies. Given a stellar mass-to-light ratio based on the measured line indices of dEs, the FP offset allows us to infer that the dark matter fraction within the half light radii of dEs is on average >42% (uncertainties of 17% in the K band and 20% in the V band), fully consistent with an independent estimate in an earlier paper in this series. We also find that dEs in the size-luminosity relation in the near-infrared, like in the optical, are offset from early-type galaxies, but seem to be consistent with late-type galaxies. We thus conclude that the scaling relations show that dEs are different from Es, and that they further strengthen our previous findings that dEs are closer to and likely formed from late-type galaxies.

Abstract Copyright:

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

Simbad objects: 22

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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 - 2020
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11056 1
2 NGC 3073 GiP 10 00 52.042 +55 37 08.17 14.12 14.07 13.40     ~ 173 2
3 IC 3025 GiG 12 10 23.189 +10 11 18.62   15.3       ~ 71 0
4 IC 3131 G 12 18 50.9015144446 +07 51 43.052463249   14.8       ~ 54 0
5 2MASX J12201221+0637231 GiG 12 20 12.1860646084 +06 37 23.516738773   15.4       ~ 28 0
6 NGC 4306 GiP 12 22 04.087 +12 47 13.96   14.4       ~ 91 0
7 IC 3328 GiP 12 25 57.964 +10 03 13.37   14.9       ~ 145 0
8 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5909 0
9 IC 3344 GiG 12 26 32.428 +13 34 44.09   15.2       ~ 59 0
10 IC 3369 GiG 12 27 16.9356456625 +16 01 28.142966991   15.1       ~ 44 0
11 IC 3381 LSB 12 28 14.854 +11 47 23.69   14.42       ~ 144 1
12 IC 3393 GiG 12 28 41.7049079126 +12 54 57.276857130   14.85 14.24   13.19 ~ 98 1
13 IC 3413 GiG 12 29 22.5162852823 +11 26 01.958802732   15.2       ~ 66 0
14 NGC 4482 GiG 12 30 10.3250399673 +10 46 46.084712572   14.2       ~ 151 0
15 IC 3470 GiP 12 32 23.353 +11 15 47.56   15.0       ~ 104 0
16 IC 3510 GiG 12 34 14.8200789724 +11 04 17.430748303   15.2       ~ 55 0
17 IC 3586 GiG 12 36 54.858 +12 31 12.49   15.3       ~ 84 0
18 IC 3652 GiG 12 40 58.5600973863 +11 11 04.081313393   15.1       ~ 103 0
19 IC 3672 GiG 12 42 08.6669706774 +11 45 15.437359667   15.1       ~ 100 0
20 IC 810 GiG 12 42 09.0797612214 +12 35 48.515873417   14.7     12.2 ~ 51 0
21 2MASX J12425631+0340355 GiG 12 42 56.3361318765 +03 40 35.751774971   15.1       ~ 40 0
22 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4267 2

    Equat.    Gal    SGal    Ecl

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2020.10.28-06:47:41

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