2005A&A...430..443V


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.27CET21:31:12

2005A&A...430..443V - Astronomy and Astrophysics, volume 430, 443-464 (2005/2-1)

The evolution of HCG 31: Optical and high-resolution HI study.

VERDES-MONTENEGRO L., DEL OLMO A., YUN M.S. and PEREA J.

Abstract (from CDS):

Here we present the results of our new optical imaging and spectroscopic study and the analysis of new high-resolution HI images of the Hickson Compact Group HCG 31. Taking advantage of the improved sensitivity and angular resolution of the new optical and HI images, we have identified an extensive complex of stellar and HI tidal features and their kinematics. Our HI study show that H31A and C are not an advanced merger since their velocity fields can be still separated and have almost orthogonal orientations. All of the current sites of ongoing active star formation are shown to be associated with the highest column density peaks traced in HI. A new companion A0500-0434 located 240kpc south of the group center is also discovered in HI. A detailed scenario for the tidal interactions involved and the origins of the individual tidal features are constructed using the morphology and kinematics of the tidal features. The derived dynamical mass for the entire group is about 2x1011M, which is a few times larger than the sum of the masses of the individual group galaxies. The ultimate fate of the group is that HCG 31 is probably on its way to form a single HI cloud group containing all galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: individual: HCG 31 - galaxies: interactions - galaxies: kinematics and dynamics - galaxies: evolution - galaxies: structure - radio lines: galaxies

Nomenclature: Fig.3, Table 2: [VDY2005] t-WW (Nos t-C, t-E, t-S, t-NE, t-NW). Text: [VDY2005] J0500-0434 N=1. Fig.1, Table 3: HCG 31aN (Nos e1-e5, f3-f7, g1-g8).

Status in Simbad:  will not be processed

Simbad objects: 33

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Number of rows : 33

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 [VDY2005] J0500-0434 GiG 05 00 -04.6           ~ 1 1
2 LEDA 1064692 G 05 00 12.99 -03 57 53.5           ~ 2 0
3 NGC 1729 GiG 05 00 15.6916064663 -03 21 09.265968552   13.2   16.57 13.0 ~ 37 0
4 ACO 531 ClG 05 01 17 -03 32.7           ~ 23 0
5 LEDA 16571 G 05 01 35.3 -04 15 24   18.53   17.06   ~ 27 0
6 2MFGC 4113 G 05 01 35.550 -04 15 47.42   15.35   14.73   ~ 58 0
7 HCG 31 CGG 05 01 37 -04 15.4           ~ 122 0
8 HCG 31e1 PoG 05 01 37.23 -04 15 48.9           ~ 3 0
9 QORG J050137.6-041557 PoG 05 01 37.48 -04 15 57.5   17.7   17.4   ~ 5 0
10 HCG 31e G 05 01 37.5 -04 15 57           ~ 24 0
11 2MASX J05013782-0415294 G 05 01 37.832 -04 15 28.48   13.44   12.76   ~ 66 1
12 NGC 1741 IG 05 01 38.3 -04 15 25   13.7   13.02 13.6 ~ 248 0
13 LEDA 3092704 GiG 05 01 38.3 -04 13 21           ~ 20 0
14 HCG 31f1 PoG 05 01 39.71 -04 16 22.2           ~ 10 0
15 HCG 31f G 05 01 40.0 -04 16 22           ~ 20 0
16 HCG 31f2 PoG 05 01 40.15 -04 16 27.5           ~ 9 0
17 HCG 31f3 PoG 05 01 40.62 -04 16 36.5           ~ 3 0
18 IC 399 EmG 05 01 44.083 -04 17 19.28   15.0 14.8     ~ 65 0
19 HCG 31f7 PoG ~ ~           ~ 1 0
20 HCG 31g2 PoG ~ ~   18.56 18.30     ~ 1 0
21 HCG 31f5 PoG ~ ~           ~ 1 0
22 HCG 31f4 PoG ~ ~           ~ 1 0
23 HCG 31e5 PoG ~ ~           ~ 1 0
24 HCG 31e4 PoG ~ ~           ~ 1 0
25 HCG 31e3 PoG ~ ~           ~ 2 0
26 HCG 31f6 PoG ~ ~           ~ 1 0
27 HCG 31g3 PoG ~ ~   18.88 18.51     ~ 1 0
28 HCG 31g4 PoG ~ ~   18.54 18.23     ~ 1 0
29 HCG 31g5 PoG ~ ~   18.62 18.27     ~ 1 0
30 HCG 31g6 PoG ~ ~   18.50 18.40     ~ 1 0
31 HCG 31g7 PoG ~ ~   19.21 18.66     ~ 1 0
32 HCG 31g8 PoG ~ ~   17.71 17.32     ~ 1 0
33 HCG 31g1 PoG ~ ~   18.96 18.65     ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.02.27-21:31:12

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