2012A&A...541A..28T


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.18CET00:36:14

2012A&A...541A..28T - Astronomy and Astrophysics, volume 541A, 28-28 (2012/5-1)

Seyfert's Sextet: where is the gas ?

TAMBURRI S., TRINCHIERI G., WOLTER A., SULENTIC J., DURBALA A. and ROSADO M.

Abstract (from CDS):

Seyfert's Sextet (a.k.a HCG 79) is one of the most compact and isolated galaxy groups in the local Universe. It shows a prominent diffuse light component that accounts for ∼50% of the total observed light. This likely indicates that the group is in an advanced evolutionary phase, which would predict a significant hot gaseous component. Previous X-ray observations had suggested a low luminosity for this system, but with large uncertainties and poor resolution. We present the results from a deep (70ks), high resolution Chandra observation of Seyfert's Sextet, requested with the aim of separating the X-ray emission associated with the individual galaxies from that of a more extended inter-galactic component. We discuss the spatial and spectral characteristics of this group we derive with those of a few similar systems also studied in the X-ray band. The high resolution X-ray image indicates that the majority of the detected emission does not arise in the compact group but is concentrated towards the NW and corresponds to what appears to be a background galaxy cluster. The emission from the group alone has a total luminosity of ∼1x1040erg/s in the (0.5-5)keV band. Most of the luminosity can be attributed to the individual sources in the galaxies, and only ∼2x1039erg/s is due to a gaseous component. However, we find that this component is also mostly associated with the individual galaxies of the Sextet, leaving little or no residual in a truly IGM component. The extremely low luminosity of the diffuse emission in Seyfert's Sextet might be related to its small total mass.

Abstract Copyright:

Journal keyword(s): galaxies: groups: general - galaxies: groups: individual: HCG 79 - intergalactic medium - X-rays: galaxies

Nomenclature: Table 2: [TTW2012] NN (Nos 1-10).

Simbad objects: 20

goto Full paper

goto View the reference in ADS

Number of rows : 20

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 HCG 15 CGG 02 07 39.0 +02 08 18           ~ 67 0
2 HCG 42 CGG 10 00 13.1 -19 38 24           ~ 94 0
3 HCG 51 CGG 11 22 21.6 +24 19 41   14.9       ~ 76 0
4 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 290 0
5 [TTW2012] 6 X 15 59 04.430 +20 45 27.37           ~ 1 0
6 [TTW2012] 7 X 15 59 10.345 +20 46 19.50           ~ 1 0
7 MCG+04-38-005 GiG 15 59 10.835 +20 45 43.83   13.4   14.21   ~ 60 1
8 MCG+04-38-006 GiG 15 59 11.156 +20 45 17.02   13.4   13.46   ~ 65 1
9 HCG 79 CGG 15 59 11.605 +20 45 24.66           ~ 101 0
10 [TTW2012] 8 X 15 59 11.695 +20 45 09.47           ~ 1 0
11 [TTW2012] 3 G 15 59 11.856 +20 44 54.11           ~ 2 0
12 [TTW2012] 4 X 15 59 11.857 +20 44 48.58           ~ 1 0
13 MCG+04-38-007 GiG 15 59 11.875 +20 44 49.71   16.89   16.74   ~ 49 1
14 NGC 6027 GiG 15 59 12.542 +20 45 48.07   13.4   13.07   ~ 93 2
15 [TTW2012] 9 X 15 59 12.778 +20 45 12.70           ~ 1 0
16 MCG+04-38-009 GiG 15 59 12.916 +20 45 35.85   16.61   15.31   ~ 24 1
17 [TTW2012] 10 X 15 59 13.215 +20 45 39.34           ~ 1 0
18 HCG 79f G 15 59 14.90 +20 45 57.3           ~ 2 0
19 HCG 90 CGG 22 02 06.3 -31 55 48           ~ 123 0
20 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 374 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...541A..28T and select 'bookmark this link' or equivalent in the popup menu


2019.11.18-00:36:14

© Université de Strasbourg/CNRS

    • Contact