Chandra and XMM–Newton observations of A2256: cold fronts, merger shocks, and constraint on the IC emission
Chandra and XMM–Newton observations of A2256: cold fronts, merger shocks, and constraint on the IC emission
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Chandra 和 XMM-Newton 对 A2256 的观测:冷锋、合并冲击以及对 IC 排放的限制
DOI:
10.1093/mnras/staa2320
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发表时间:
2020
影响因子:
4.8
通讯作者:
Markevitch, Maxim
中科院分区:
文献类型:
--
作者:
Ge, Chong;Liu, Ruo-Yu;Sun, Ming;Yu, Heng;Rudnick, Lawrence;Eilek, Jean;Owen, Frazer;Dasadia, Sarthak;Rossetti, Mariachiara;Markevitch, Maxim
We present the results of deepChandraandXMM–Newtonobservations of a complex merging galaxy cluster Abell 2256 (A2256) that hosts a spectacular radio relic (RR). The temperature and metallicity maps show clear evidence of a merger between the western subcluster (SC) and the primary cluster (PC). We detect five X-ray surface brightness edges. Three of them near the cluster centre are cold fronts (CFs): CF1 is associated with the infalling SC; CF2 is located in the east of the PC; and CF3 is located to the west of the PC core. The other two edges at cluster outskirts are shock fronts (SFs): SF1 near the RR in the NW has Mach numbers derived from the temperature and the density jumps, respectively, ofMT= 1.62 ± 0.12 andMρ= 1.23 ± 0.06; SF2 in the SE hasMT= 1.54 ± 0.05 andMρ= 1.16 ± 0.13. In the region of the RR, there is no evidence for the correlation between X-ray and radio substructures, from which we estimate an upper limit for the inverse-Compton emission, and therefore set a lower limit on the magnetic field (∼ 450 kpc from PC centre) ofB> 1.0 μG for a single power-law electron spectrum orB> 0.4 μG for a broken power-law electron spectrum. We propose a merger scenario including a PC, an SC, and a group. Our merger scenario accounts for the X-ray edges, diffuse radio features, and galaxy kinematics, as well as projection effects.
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DOI:
10.1086/504076
发表时间:
2006-03
期刊:
The Astronomical Journal
影响因子:
--
作者:
T. Clarke;Torsten A. Ensslin Naval Research Laboratory;Interferometrics Inc.;M. F. Astrophysik
通讯作者:
T. Clarke;Torsten A. Ensslin Naval Research Laboratory;Interferometrics Inc.;M. F. Astrophysik
DOI:
10.1086/510895
发表时间:
2006-06
期刊:
The Astrophysical Journal
影响因子:
--
作者:
M. Sun;C. Jones;W. Forman;A. Vikhlinin;M. Donahue;M. Voit
通讯作者:
M. Sun;C. Jones;W. Forman;A. Vikhlinin;M. Donahue;M. Voit
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
J. Burns;S. Skillman;B. O’Shea
通讯作者:
B. O’Shea
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
D. Kim;B. Wilkes;P. Green;R. Cameron;J. Drake;N. Evans;P. Freeman;T. Gaetz;H. Ghosh;F. R. Harnden, Jr.;M. Karovska;V. Kashyap;P. Maksym;P. Ratzlaff;E. Schlegel;J. Silverman;H. Tananbaum;A. Vikhlinin
通讯作者:
A. Vikhlinin
DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
C. Sarazin;A. Finoguenov;D. Wik;T. Clarke
通讯作者:
T. Clarke