2021MNRAS.500.5524T


Query : 2021MNRAS.500.5524T

2021MNRAS.500.5524T - Mon. Not. R. Astron. Soc., 500, 5524-5542 (2021/February-1)

The Hercules cluster in X-rays with XMM-Newton and Chandra.

TIWARI J. and SINGH K.P.

Abstract (from CDS):

We present a detailed X-ray study of the central subcluster of the nearby (z ∼0.0368) Hercules cluster (Abell 2151) identified as A2151C that shows a bimodal structure. A bright clump of hot gas with X-ray emission extending to radius r ∼304 kpc and LX=3.03–0.04+0.02×1043 erg s–1 in the 0.4-7.0 keV energy range is seen as a fairly regular subclump towards the west (A2151C(B)). An irregular, fainter and cooler subclump with radius r ∼364 kpc is seen towards the east (A2151C(F)) and has LX = 1.13 ± 0.02 x 1043 erg s–1 in the 0.4-7.0 keV energy band. The average temperature and elemental abundance of A2151C(B) are 2.01 ± 0.05 keV and 0.43 ± 0.05 Z, respectively, while these values are 1.17 ± 0.04 keV and 0.13 ± 0.02 Z for A2151C(F). Low temperature (1.55 ± 0.07 keV) and a short cooling time (∼0.81 Gyr) within the central 15 arcsec region confirm the presence of a cool core in A2151C(B). We identify several compact groups of galaxies within A2151C(F). We find that A2151C(F) is a distinct galaxy group in the process of formation and likely not a ram-pressure stripped part of the eastern subcluster in Hercules (A2151E). X-ray emission from A2151C shows a region of overlap between A2151C(B) and A2151C(F) but without any enhancement of temperature or entropy in the two-dimensional (2D) projected thermodynamic maps that could have indicated an interaction due to a merger between the two subclumps.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): X-rays: galaxies: clusters - galaxies: clusters: intracluster medium - galaxies: clusters: general - galaxies: clusters: individual: (A2151)

Status at CDS : Examining the need for a new acronym.

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 - 2023
#notes
1 ACO 76 ClG 00 40 16.1031 +06 52 46.226           ~ 131 2
2 NAME North Polar Spur ISM 12 00 +00.0           ~ 347 1
3 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 11.40 12.122 11.386 ~ 766 3
4 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4604 2
5 NAME HERCULES SUPERCL SCG 15 47 +18.2           ~ 148 1
6 ACO 2147 ClG 16 02 17.2 +15 53 43           ~ 395 0
7 NGC 6039 G 16 04 26.6 +17 44 30   14.6       ~ 18 0
8 NGC 6040 LIN 16 04 26.7272564952 +17 45 01.162876140   14.6       ~ 62 0
9 NGC 6041 BiC 16 04 35.7922766976 +17 43 17.522077764   14.9       ~ 70 2
10 NGC 6047 rG 16 05 08.9880545352 +17 43 47.574625512   15.4       ~ 113 1
11 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 572 3
12 [BDB95] A2151C ClG 16 05 15.5 +17 39 45           ~ 3 0
13 SDSSCGB 4240 CGG 16 05 21.8 +17 45 03           ~ 4 0
14 ACO 2152 ClG 16 05 22.4 +16 26 55           ~ 159 0
15 [BDB95] A2151N ClG 16 05 55.0 +18 08 27           ~ 4 0
16 NGC 6061 QSO 16 06 16.02781121 +18 14 59.8199294   15.0 15.0     ~ 95 1
17 [BDB95] A2151E ClG 16 06 44.2 +17 46 13           ~ 4 0
18 NAME LHB X 16 42.0 +02 19           ~ 310 0

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2023.02.06-06:43:32

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