Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/4628
Title: The Hercules cluster in X-rays with XMM-Newton and Chandra.
Authors: Tiwari, Juhi
Singh, Kulinder Pal
Keywords: galaxies: clusters: general
X-rays: galaxies: clusters
galaxies: clusters: intracluster medium
Issue Date: 2021
Citation: Monthly Notices of the Royal Astronomical Society, 500(4), 5524–5542.
Abstract: 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+0.02−0.04×1043 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 × 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.
Description: Only IISERM authors are available in the record.
URI: https://doi.org/10.1093/mnras/staa3619
http://hdl.handle.net/123456789/4628
Appears in Collections:Research Articles

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