2008A&A...484..195T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST23:25:01

2008A&A...484..195T - Astronomy and Astrophysics, volume 484, 195-203 (2008/6-2)

Detection of a hot intergalactic medium in the spiral-only compact group SCG0018-4854.

TRINCHIERI G., IOVINO A., POMPEI E., DAHLEM M., REEVES J., COZIOL R. and TEMPORIN S.

Abstract (from CDS):

Compact groups of galaxies are excellent laboratories for studying galaxy interactions and their effects on the evolution of galaxies. In particular, dynamically young systems, with a large fraction of interacting, late type galaxies, have so far escaped proper studies in the X-ray band and their hot intergalactic medium properties are virtually unknown. Motivated by this lack of knowledge, we present a detailed investigation here of the X-ray properties of such a dynamically young system. We obtained XMM-Newton observations of one spiral-only system in the new southern compact group catalogue: SCG0018-4854. We present here the results of the data analysis and discuss them in comparison with the few other similar systems also studied in the X-ray band. The 4 members of SCG0018-4854 emit at a level comparable to what is expected based on their optical properties. We detect the low level diffuse emission between galaxies, which is most likely due to the presence of the intergalactic medium. Compared to other spiral-only groups, SCG0018-4854 could be the coolest system detected so far, although the measurements have large uncertainties. These results indicate that high quality deep X-ray observations are needed to allow a proper study of the properties of the potential well of dynamically young systems, before more general conclusions can be drawn on their average characteristics.

Abstract Copyright:

Journal keyword(s): galaxies: intergalactic medium - X-rays: galaxies

Simbad objects: 19

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Number of rows : 19

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   ~ 22 0
5 NGC 92 GiC 00 21 31.713 -48 37 29.23   13.71   12.40   ~ 38 0
6 ESO 194-13 G 00 22 38.0490450901 -48 34 51.963475777   14.00   13.04   ~ 16 0
7 Str 0034-523 ClG 00 36 -52.0           ~ 3 0
8 NAME Cartwheel G 00 37 41.107 -33 42 58.79   19.26   18.52   ~ 252 1
9 HCG 16 CGG 02 09 42.710 -10 11 01.36           ~ 155 0
10 M 77 GiP 02 42 40.771 -00 00 47.84 9.70 9.61 8.87 10.1 9.9 ~ 4089 2
11 NGC 1482 GiP 03 54 38.928 -20 30 08.82 13.15 13.14 12.15 11.29   ~ 256 2
12 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5332 6
13 NGC 3079 Sy2 10 01 57.80342 +55 40 47.2428 11.57 11.54 10.86     ~ 1247 3
14 HCG 57 CGG 11 37 50.5 +21 59 06     15.4     ~ 81 1
15 HCG 80 CGG 15 59 12 +65 13.6   17.7       ~ 24 0
16 2MFGC 12823 G 15 59 19.127 +65 13 57.95   15.66   14.25   ~ 20 0
17 HCG 90 CGG 22 02 06.3 -31 55 48           ~ 125 0
18 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 375 1
19 NAME Local Group GrG ~ ~           ~ 6970 0

    Equat.    Gal    SGal    Ecl

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2020.07.06-23:25:01

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