2007A&A...463..153T


Query : 2007A&A...463..153T

2007A&A...463..153T - Astronomy and Astrophysics, volume 463, 153-164 (2007/2-3)

Evidence of unrelaxed IGM around IC 1262.

TRINCHIERI G., BREITSCHWERDT D., PIETSCH W., SULENTIC J. and WOLTER A.

Abstract (from CDS):

A peculiar morphology of the hot gas was discovered at the center of IC 1262 with the ROSAT HRI. Sensitive Chandra and XMM-Newton data were requested to investigate the characteristics of this structure to understand its nature. We have exploited the high resolution and sensitivity of Chandra's ACIS-S to investigate the peculiar morphology and spectral characteristics of hot gas in the group around IC 1262. XMM-Newton data are only partially usable due to very heavy high background contamination, but they are useful to confirm and strengthen the results from Chandra. The Chandra data show a quite dramatic view of the IC 1262 system: a sharp discontinuity east of the central galaxy, with steep drops and a relatively narrow feature over 100kpc long, plus an arc/loop to the N, are all indicative of a turmoil in the high energy component. Their morphologies could suggest them to be tracers of shocked material caused either by peculiar motions in the system or by a recent merger process, but the spectral characteristics indicate that the structure is cooler than its surroundings. The lack of evidence of significant structures in the velocity distribution of the group members and the estimated scale of the phenomenon make the interpretation of its physical nature challenging. We review a few possible interpretations, in light of similar phenomena observed in clusters and groups. The ram pressure stripping of a bright spiral galaxy, now near the center of the group, is a promising interpretation for most of the features observed. The relation with the radio activity requires a better sampling of the radio parameters that can only be achieved with deeper and higher resolution observations.

Abstract Copyright:

Journal keyword(s): ISM: general - X-rays: galaxies: clusters - galaxies: ISM - X-rays: ISM

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2118 1
2 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3809 3
3 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 885 1
4 NAME Hya A LIN 09 18 05.6783347248 -12 05 43.634531472   14.38 14.8     ~ 964 1
5 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1080 1
6 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1205 0
7 ACO 2052 ClG 15 16 45.5 +07 00 01           ~ 703 1
8 ESO 137-1 G 16 13 27.305 -60 45 50.59   14.84   13.87   ~ 105 0
9 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 274 2
10 IC 1262 BiC 17 33 02.0176600056 +43 45 34.803150516   14.9       ~ 70 0
11 IC 1263 G 17 33 07.2171697200 +43 49 19.338029652   14.8       ~ 22 0
12 IC 1264 GiC 17 33 16.8121635072 +43 37 44.947107264   15.6       ~ 15 0
13 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2257 2
14 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 595 1
15 NAME Stephan's Quintet CGG 22 35 57.5 +33 57 36           ~ 400 1
16 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 519 0
17 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 491 2
18 ACO 4059 ClG 23 56 40.7 -34 40 18           ~ 369 1

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2022.10.02-02:13:59

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