2010A&A...510A..31P


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.21CEST15:58:18

2010A&A...510A..31P - Astronomy and Astrophysics, volume 510, A31 (2010/2-1)

SCG0018-4854: a young and dynamic compact group. I. Kinematical analyses.

PRESOTTO V., IOVINO A., POMPEI E. and TEMPORIN S.

Abstract (from CDS):

It has been widely recognized that processes taking place inside group environment could be important drivers of galaxy evolution. Compact groups of galaxies in particular are excellent laboratories for studying galaxy interactions and their effects on the evolution of galaxies due to their high density and low velocity dispersion. SCG0018-4854 is a remarkably high galaxy density and low velocity dispersion group with evidence of a recent interaction. It has been detected and analyzed at different wavelengths, but its kinematics have never been studied in detail. We obtained VLT FORS2 optical observations and present spectroscopic and photometric evidence to illustrate how dramatically galaxy interactions have affected each of the four group member galaxies. For each galaxy, we detected peculiar kinematics and evidence of recent star formation. In particular, the gas and stellar radial velocity curves of two galaxies are irregular with a level of asymmetry similar to that of other interacting galaxies. We discovered a bar inside NGC 92 thereby revising a previous morphological classification, and we obtained spectroscopic confirmation of the galactic-scale outflow within NGC 89. The peculiar kinematics and dynamical considerations provide a rough estimate of the age of the latest interaction of τ≃0.2-0.7Gyr, suggesting that SCG0018-4854 is a young and dynamical group.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: SCG 0018-4854 - galaxies: interactions - galaxies: kinematics and dynamics

Simbad objects: 15

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Number of rows : 15

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 NGC 87 GiG 00 21 14.062 -48 37 48.28   14.70   14.01   ~ 19 0
2 NGC 88 GiG 00 21 22.132 -48 38 24.28   15.11   14.21   ~ 20 0
3 SCG2 0018-4854 CGG 00 21 23.0 -48 38 20   13.91       ~ 16 0
4 NGC 89 GiG 00 21 24.355 -48 39 55.28   14.28   12.98   ~ 23 0
5 NGC 92 GiC 00 21 31.713 -48 37 29.23   13.71   12.40   ~ 39 0
6 HCG 16 CGG 02 09 40.82 -10 11 02.0           ~ 157 0
7 ESO 198-13 G 02 29 16.1284360516 -48 29 28.468943154   13.66   12.02   ~ 21 0
8 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1187 3
9 HD 36003 PM* 05 28 26.0954741443 -03 29 58.396897793 9.864 8.777 7.642 6.968 6.401 K5V 184 0
10 M 42 HII 05 35 17.3 -05 23 28           ~ 3751 0
11 NGC 2992 Sy2 09 45 42.045 -14 19 34.90 13.54 13.14 12.18 12.6 12.2 ~ 791 3
12 NGC 2993 EmG 09 45 48.325 -14 22 06.02 12.72 13.11 12.64 13.4 13.0 ~ 158 1
13 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5367 6
14 Mrk 315 Sy1 23 04 02.6204973580 +22 37 27.435670055   15.60 14.78     ~ 140 0
15 MCG-01-60-021 LIN 23 41 47.285 -03 40 01.90 14.88 14.50 13.57     ~ 83 1

    Equat.    Gal    SGal    Ecl

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2020.10.21-15:58:18

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