SIMBAD references

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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2022.11.30-10:57:11

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