2023ApJ...958...93M

Query : 2023ApJ...958...93M

2023ApJ...958...93M - Astrophys. J., 958, 93 (2023/November-3)

A Chandra Study of the NGC 7618/UGC 12491 Major Group Merger at Apogee: Multiple Cold Fronts, Boxy Wings, Filaments, and Arc-shaped Slingshot Tails.

MACHACEK M.E., JONES C., KRAFT R.P., FORMAN W.R., ROEDIGER E., SHEARDOWN A. and WAN J.T.

Abstract (from CDS):

Analyses of major group mergers are key to understanding the evolution of large-scale structure in the Universe and the microphysical properties of the hot gas in these systems. We present imaging and spectral analyses of deep Chandra observations of hot gas structures formed in the major merger of the NGC 7618 and UGC 12491 galaxy groups and compare the observed hot gas morphology, temperatures, and abundances with recent simulations. The morphology of the observed multiple cold front edges and boxy wings are consistent with those expected to be formed by Kelvin-Helmholtz instabilities and gas sloshing in inviscid gas. The arc-shaped slingshot tail morphologies seen in each galaxy suggest that the dominant galaxies are near their orbital apogee after having experienced at least one core passage at a large impact parameter.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Galaxy environments - Galaxy mergers - Cool intergalactic medium - X-ray astronomy - Galaxy groups

Simbad objects: 27

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Number of rows : 27
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 115 ClG 00 55 59 +26 23.2           ~ 295 1
2 IC 1860 Sy1 02 49 33.8577739752 -31 11 21.664508208   13.00   11.47   ~ 82 1
3 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
4 NGC 1404 rG 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 787 1
5 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
6 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
7 BAX 117.8422+50.2109 ClG 07 51 24.61 +50 15 00.6           ~ 34 0
8 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
9 MCG-02-24-007 LIN 09 18 05.66848602 -12 05 43.8060823   14.38 14.8     ~ 1077 1
10 NAME NGC 6861 Group GrG 11 30 +28.1   13.1       ~ 5 0
11 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1126 1
12 M 49 Sy2 12 29 46.8 +08 00 01   13.21 12.17     ~ 2174 2
13 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
14 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
15 M 60 GiC 12 43 39.9708251934 +11 33 09.688174067   10.3       ~ 1395 1
16 NAME NGC 5044 Group GrG 13 14 22.7 -16 32 04           ~ 186 0
17 ClG J1347-1145 ClG 13 47 30.5 -11 45 07           ~ 577 0
18 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
19 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 165 0
20 ACO 2029 ClG 15 10 54.2 +05 44 23           ~ 1020 0
21 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
22 NGC 6338 Bla 17 15 22.9842192344 +57 24 40.346559927   14.2   8   ~ 205 2
23 NAME NGC 6868 Group GrG 20 09 39.6 -48 19 39           ~ 36 0
24 Z 532-11 BiC 23 18 38.2641503880 +42 57 28.797497604   15.3       ~ 41 1
25 NAME NGC 7618 Group GrG 23 19 47.22 +42 51 09.5           ~ 5 0
26 NGC 7618 GiG 23 19 47.2346536992 +42 51 09.228387528   14.3       ~ 72 2
27 NGC 7619 GiG 23 20 14.524 +08 12 22.63   12.7       ~ 472 0

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