2012A&A...546A..15A


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.12CET06:45:27

2012A&A...546A..15A - Astronomy and Astrophysics, volume 546A, 15-15 (2012/10-1)

Globular cluster systems in fossil groups: NGC 6482, NGC 1132, and ESO 306-017.

ALAMO-MARTINEZ K.A., WEST M.J., BLAKESLEE J.P., GONZALEZ-LOPEZLIRA R.A., JORDAN A., GREGG M., COTE P., DRINKWATER M.J. and VAN DEN BERGH S.

Abstract (from CDS):

We study the globular cluster (GC) systems in three representative fossil group galaxies: the nearest (NGC6482), the prototype (NGC1132) and the most massive known to date (ESO306-017). This is the first systematic study of GC systems in fossil groups. Using data obtained with the Hubble Space Telescope Advanced Camera for Surveys in the F475W and F850LP filters, we determine the GC color and magnitude distributions, surface number density profiles, and specific frequencies. In all three systems, the GC color distribution is bimodal, the GCs are spatially more extended than the starlight, and the red population is more concentrated than the blue. The specific frequencies seem to scale with the optical luminosities of the central galaxy and span a range similar to that of the normal bright elliptical galaxies in rich environments. We also analyze the galaxy surface brightness distributions to look for deviations from the best-fit Sersic profiles; we find evidence of recent dynamical interaction in all three fossil group galaxies. Using X-ray data from the literature, we find that luminosity and metallicity appear to correlate with the number of GCs and their mean color, respectively. Interestingly, although NGC6482 has the lowest mass and luminosity in our sample, its GC system has the reddest mean color, and the surrounding X-ray gas has the highest metallicity.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: star clusters: general - galaxies: groups: general - galaxies: individual: NGC 6482 - galaxies: individual: NGC 1132 - galaxies: individual: ESO 306-017

Simbad objects: 8

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Number of rows : 8

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 RXC J0252.8-0116 ClG 02 52 49.4 -01 16 27           ~ 99 0
2 NGC 1132 GiG 02 52 51.82 -01 16 29.0   13.9   12.16   ~ 141 0
3 ESO 306-17 BiC 05 40 06.672 -40 50 11.46   13.35   11.82   ~ 50 1
4 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5668 0
5 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6048 3
6 M 60 GiP 12 43 40.008 +11 33 09.40   10.3       ~ 1224 0
7 NGC 6484 GiG 17 51 46.9950685916 +24 29 00.883246338   13.5       ~ 44 0
8 NGC 6482 GiG 17 51 48.8334002678 +23 04 18.884647281 12.71 12.35 11.45     ~ 185 1

    Equat.    Gal    SGal    Ecl

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2019.12.12-06:45:27

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