In:
The Astrophysical Journal, American Astronomical Society, Vol. 887, No. 1 ( 2019-12-10), p. 31-
Abstract:
We present deep Chandra observations of A3411–12, a remarkable merging cluster that hosts the most compelling evidence for electron reacceleration at cluster shocks to date. Using the scaling relation, we find r 500 ∼ 1.3 Mpc, , , and a gas mass of . The gas mass fraction within r 500 is . We compute the shock strength using density jumps to conclude that the Mach number of the merging subcluster is small ( ). We also present density, temperature, pseudo-pressure, and pseudo-entropy maps. Based on the pseudo-entropy map, we conclude that the cluster is undergoing a mild merger, consistent with the small Mach number. On the other hand, radio relics extend over Mpc scale in the A3411–12 system, which strongly suggests that a population of energetic electrons already existed over extended regions of the cluster.
Type of Medium:
Online Resource
ISSN:
0004-637X
,
1538-4357
DOI:
10.3847/1538-4357/ab4ce5
Language:
Unknown
Publisher:
American Astronomical Society
Publication Date:
2019
detail.hit.zdb_id:
2960-9
detail.hit.zdb_id:
1473835-1
SSG:
16,12
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