2006A&A...457..771A


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:49:54

2006A&A...457..771A - Astronomy and Astrophysics, volume 457, 771-778 (2006/10-3)

Diffuse light in Hickson compact groups: the dynamically young system HCG 44.

AGUERRI J.A.L., CASTRO-RODRIGUEZ N., NAPOLITANO N., ARNABOLDI M. and GERHARD O.

Abstract (from CDS):

Compact groups are associations of a few galaxies in which the environment plays an important role in galaxy evolution. The low group velocity dispersion favors tidal interactions and mergers, which may bring stars from galaxies to the diffuse intragroup light. Numerical simulations of galaxy clusters in hierarchical cosmologies show that the amount of the diffuse light increases with the dynamical evolution of the cluster. We search for diffuse light in the galaxy group HCG 44 in order to determine its luminosity and luminosity fraction. Combining with literature data, we aim to constrain the dynamical status of Hickson compact groups.We use Intra Group planetary nebulae (IGPNe) as tracers of diffuse light. These are detected by the so-called on band-off band technique.We found 12 emission line objects in HCG 44, none of them associated with the galaxies of the group. The absence of PNe in the elliptical galaxy, NGC 3193, implies that this galaxy is located behind the group, leaving only three spiral galaxy members in HCG 44. 6/12 emission line objects are consistent with being IGPNe in HCG 44, but are also consistent with being Lyα background galaxies. Thus we derive an upper limit to the diffuse light fraction in HCG 44 of 4.7%, corresponding to 1.06x109L☉,B and mean surface brightness of µB=30.04mag/arcsec2. We find a correlation between the fraction of elliptical galaxies and the amount of diffuse light in Hickson compact groups. Those with large fraction of diffuse light are those with large fractions in number and luminosity of E/S0 galaxies. This indicates that the diffuse light is mainly created in dynamical processes during the formation of bright elliptical galaxies in major mergers.We propose an evolutionary sequence for Hickson compact groups in which the amount of diffuse light increases with the dynamical evolution of the group.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: clusters: general - galaxies: interactions

Nomenclature: Table 2: [ACN2006] HCG 44-ESNN (Nos ES1 to ES12).

Simbad objects: 32

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Number of rows : 32

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11201 1
2 NAME M 81-82 Group GrG 09 55 +69.1           ~ 646 0
3 [ACN2006] HCG 44-ES10 EmO 10 16 42.70 +21 55 52.9           ~ 1 0
4 [ACN2006] HCG 44-ES9 EmO 10 16 45.00 +21 41 24.2   26.25       ~ 1 0
5 [ACN2006] HCG 44-ES7 EmO 10 17 04.70 +21 49 49.1   26.03       ~ 1 0
6 [ACN2006] HCG 44-ES8 EmO 10 17 18.90 +21 51 29.5   26.06       ~ 1 0
7 [ACN2006] HCG 44-ES4 EmO 10 17 33.80 +21 43 44.4   26.37       ~ 1 0
8 NGC 3185 GiP 10 17 38.5632620545 +21 41 17.601414448   12.99 12.17 12.37   ~ 263 1
9 NGC 3187 GiP 10 17 47.8695015096 +21 52 24.005791156 13.71 13.91 13.44 14.06   ~ 147 1
10 [ACN2006] HCG 44-ES6 EmO 10 17 52.80 +21 38 41.1   27.11       ~ 1 0
11 [ACN2006] HCG 44-ES1 EmO 10 17 58.00 +21 39 01.9   26.64       ~ 1 0
12 HCG 44 CGG 10 18 00 +21 48.7           ~ 77 0
13 [ACN2006] HCG 44-ES2 EmO 10 18 05.40 +21 40 24.9   28.31       ~ 1 0
14 NGC 3189 GiP 10 18 05.643 +21 49 54.98 12.60 12.12 11.15 11.14   ~ 361 2
15 [ACN2006] HCG 44-ES5 EmO 10 18 10.70 +21 45 03.1   26.08       ~ 1 0
16 [ACN2006] HCG 44-ES3 EmO 10 18 13.40 +21 41 58.8   26.43       ~ 1 0
17 [ACN2006] HCG 44-ES12 EmO 10 18 17.10 +21 56 02.1   28.24       ~ 1 0
18 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 269 1
19 [ACN2006] HCG 44-ES11 EmO 10 18 48.20 +21 51 06.7   28.25       ~ 1 0
20 M 95 GiP 10 43 57.733 +11 42 13.00 10.71 10.51 9.73 9.48   ~ 964 2
21 NAME M96 Group GrG 10 48 +13.3           ~ 283 0
22 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1662 2
23 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1022 1
24 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5979 0
25 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6348 3
26 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4317 2
27 NGC 5886 GiG 15 12 45.453 +41 14 00.87   15.1       ~ 18 0
28 HCG 79 CGG 15 59 11.605 +20 45 24.66           ~ 104 0
29 HCG 88 CGG 20 52.4 -05 45           ~ 49 0
30 HCG 90 CGG 22 02 06.3 -31 55 48           ~ 125 0
31 HCG 94 CGG 23 17 16.5 +18 43 11           ~ 76 0
32 HCG 95 CGG 23 19 32 +09 29.5           ~ 50 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-02:49:54

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