2015MNRAS.451.2793E

Query : 2015MNRAS.451.2793E

2015MNRAS.451.2793E - Mon. Not. R. Astron. Soc., 451, 2793-2813 (2015/August-2)

Star formation properties of Hickson Compact Groups based on deep Hα imaging.

EIGENTHALER P., PLOECKINGER S., VERDUGO M. and ZIEGLER B.

Abstract (from CDS):

We present deep Hα imaging of seven Hickson Compact Groups (HCGs) using the 4.1-m Southern Astrophysics Research (SOAR) Telescope. The high spatial resolution of the observations allows us to study both the integrated star formation properties of the main galaxies as well as the 2D distribution of star-forming knots in the faint tidal arms that form during interactions between the individual galaxies. We derive star formation rates and stellar masses for group members and discuss their position relative to the main sequence of star-forming galaxies. Despite the existence of tidal features within the galaxy groups, we do not find any indication for enhanced star formation in the selected sample of HCGs. We study azimuthally averaged Hα profiles of the galaxy discs and compare them with the g' and r' surface brightness profiles. We do not find any truncated galaxy discs but reveal that more massive galaxies show a higher light concentration in Hα than less massive ones. We also see that galaxies that show a high light concentration in r', show a systematic higher light concentration in Hα. Tidal dwarf galaxy (TDG) candidates have been previously detected in R-band images for two groups in our sample but we find that most of them are likely background objects as they do not show any emission in Hα. We present a new TDG candidate at the tip of the tidal tail in HCG 91.

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

Journal keyword(s): galaxies: evolution - galaxies: groups: general - galaxies: interactions - galaxies: photometry

Nomenclature: Table 7: [EPV2015] HCG NN a N=15.

Simbad objects: 59

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Number of rows : 59
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 LEDA 2040 EmG 00 34 08.3015194272 -21 26 07.725305184   16.61   15.26   ~ 10 0
2 ESO 540-1 Sy1 00 34 13.6 -21 26 24   13.66   12.36 13.5 ~ 102 0
3 ESO 540-2 LSB 00 34 14.070 -21 28 12.05   15.45 13.18 14.63   ~ 29 0
4 HCG 4 CGG 00 34 15.3 -21 26 52           ~ 59 0
5 2MASX J00341549-2125030 GiG 00 34 15.5205282456 -21 25 03.137439432   16.11   14.45   ~ 19 0
6 2MASX J00341664-2128380 GiG 00 34 16.6514147208 -21 28 37.494550524   15.79   14.80   ~ 26 0
7 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 12643 1
8 CD-28 595 PM* 01 54 50.2703221766 -27 28 35.739139915   12.06 11.51     ~ 130 0
9 2MASX J03201276-1051478 G 03 20 12.7302802392 -10 51 47.922260364   17.26   15.35   ~ 11 0
10 MCG-02-09-031 EmG 03 20 15.1534156704 -10 51 47.053415448   15.89   14.07   ~ 22 0
11 2MASX J03201792-1052018 G 03 20 17.9430576072 -10 52 01.796228976   18.30   16.45   ~ 7 0
12 HCG 24 CGG 03 20.3 -10 51           ~ 28 0
13 2MASX J03202009-1051288 G 03 20 20.0615773272 -10 51 28.466304516   17.95   16.25   ~ 10 0
14 MCG-02-09-032 EmG 03 20 22.6037859960 -10 52 01.136331012   15.60   13.94   ~ 19 0
15 LEDA 12530 G 03 20 42.6291274032 -01 00 22.850791020   16.67   15.38   ~ 15 0
16 NVSS J032042-010628 rG 03 20 42.956 -01 06 31.15   14.70   13.63   ~ 82 0
17 Z 390-70 Sy2 03 20 43.1857210968 -01 00 08.162342424   16.10   14.60   ~ 37 0
18 HCG 25 CGG 03 20 43.7 -01 03 07     13.6     ~ 62 0
19 LEDA 12538 G 03 20 45.3272360592 -01 03 14.224586328   16.66   14.96   ~ 34 0
20 UGC 2691 GiG 03 20 45.4171166448 -01 02 40.908067368   14.9   12.33   ~ 48 0
21 2MASX J03205209-0103473 G 03 20 52.1237135352 -01 03 47.530481256   17.38   15.60   ~ 16 0
22 2MASX J03214942-1338416 G 03 21 49.3890501048 -13 38 41.258342868   17.61   16.46   ~ 13 0
23 LEDA 12605 G 03 21 51.1 -13 39 49   18.34   17.57   ~ 14 0
24 HCG 26 CGG 03 21 54 -13 38.8           ~ 36 0
25 [EPV2015] HCG 26 b G? 03 21 54.58 -13 38 25.3           ~ 2 0
26 [EPV2015] HCG 26 a G? 03 21 54.70 -13 38 34.5           ~ 2 0
27 [EPV2015] HCG 26 c G? 03 21 54.75 -13 38 18.4           ~ 1 0
28 LEDA 12610 G 03 21 55.1 -13 38 54   18.48   17.61   ~ 10 0
29 2MFGC 2760 G 03 21 55.30 -13 39 03.0   17.34   15.93   ~ 17 0
30 LEDA 12613 G 03 21 56.5 -13 38 42   16.94   16.77   ~ 13 0
31 HCG 26b G 03 21 57.15 -13 38 54.0   16.74   15.46   ~ 13 0
32 LEDA 12615 G 03 21 57.5 -13 39 46   18.93   18.57   ~ 11 0
33 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6642 0
34 MCG-01-54-012 G 21 20 01.0172699016 -03 55 19.686927216   15.50   14.27   ~ 30 0
35 LEDA 66574 G 21 20 07.999 -03 54 29.41   17.16   16.32   ~ 20 0
36 2MASX J21200830-0355036 G 21 20 08.341 -03 55 03.69   16.55   15.39   ~ 24 0
37 HCG 89 CGG 21 20.2 -03 54           ~ 33 0
38 LEDA 66580 EmG 21 20 19.123 -03 53 45.62   16.22   15.18   ~ 25 0
39 HCG 91 CGG 22 09 00.8 -27 47 36           ~ 54 0
40 [EPV2015] HCG 91 b G? 22 09 03.64 -27 48 17.4           ~ 2 0
41 [EPV2015] HCG 91 a G? 22 09 04.13 -27 48 08.7           ~ 2 0
42 [EPV2015] HCG 91 j G? 22 09 06.30 -27 46 35.5           ~ 2 0
43 [EPV2015] HCG 91 i G? 22 09 06.98 -27 46 42.4           ~ 2 0
44 NGC 7214 Sy1 22 09 07.6631604816 -27 48 34.160960772   12.48 14.10 11.40   ~ 138 0
45 HCG 91d GiG 22 09 08.20 -27 48 01.0   12.64   11.57   ~ 23 0
46 [EPV2015] HCG 91 c G? 22 09 09.17 -27 49 13.0           ~ 2 0
47 [EPV2015] HCG 91 d G? 22 09 09.60 -27 49 13.0           ~ 2 0
48 [EPV2015] HCG 91 h G? 22 09 10.22 -27 47 05.9           ~ 1 0
49 [EPV2015] HCG 91 e G? 22 09 11.04 -27 49 12.8           ~ 2 0
50 [EPV2015] HCG 91 f G? 22 09 13.09 -27 48 01.1           ~ 1 0
51 ESO 467-13 EmG 22 09 13.9920880800 -27 46 55.650989460   14.76   13.99   ~ 55 0
52 [EPV2015] HCG 91 g G? 22 09 14.02 -27 47 54.1           ~ 2 0
53 NGC 7674 Sy2 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 700 4
54 [EPV2015] HCG 96 a G? 23 27 56.73 +08 47 21.0           ~ 2 0
55 MCG+01-59-081 G 23 27 58.7553926496 +08 46 57.872148456   16.10   14.38   ~ 61 0
56 LEDA 71507 G 23 28 00.2 +08 46 02   17.13   16.10   ~ 32 0
57 HCG 96 CGG 23 28 00.40 +08 46 36.9           ~ 50 0
58 [EPV2015] HCG 96 b G? 23 28 01.89 +08 46 58.7           ~ 1 0
59 NGC 7675 GiG 23 28 05.9207591784 +08 46 06.691000476   14.8   13.20   ~ 61 1

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