Deep (103 ks) \chandra\ observations of Abell 665 have revealed rich
structures in this merging galaxy cluster, including a strong shock and two
cold fronts. The newly discovered shock has a Mach number of $M$ = 3.0 $\pm$
0.6, propagating in front of a cold disrupted cloud. This makes Abell~665 the
second cluster where a strong merger shock of $M \approx$ 3 has been detected,
after the Bullet cluster. The shock velocity from jump conditions is consistent
with (2.7 $\pm$ 0.7) $\times$ 10$^3$ km sec$^-1$. The new data also reveal a
prominent southern cold front, with potentially heated gas ahead of it. Abell
665 also hosts a giant radio halo. There is a hint of diffuse radio emission
extending to the shock at the north, which needs to be examined with better
radio data. This new strong shock provides a great opportunity to study the
re-acceleration model with the X-ray and radio data combined.
%0 Generic
%1 dasadia2016strong
%A Dasadia, Sarthak
%A Sun, Ming
%A Sarazin, Craig
%A Morandi, Andrea
%A Markevitch, Maxim
%A Wik, Daniel
%A Feretti, Luigina
%A Giovannini, Gabriele
%A Govoni, Federica
%A Vacca, Valentina
%D 2016
%K cluster cold front merger shocks
%T A Strong Merger Shock in Abell 665
%U http://arxiv.org/abs/1603.01271
%X Deep (103 ks) \chandra\ observations of Abell 665 have revealed rich
structures in this merging galaxy cluster, including a strong shock and two
cold fronts. The newly discovered shock has a Mach number of $M$ = 3.0 $\pm$
0.6, propagating in front of a cold disrupted cloud. This makes Abell~665 the
second cluster where a strong merger shock of $M \approx$ 3 has been detected,
after the Bullet cluster. The shock velocity from jump conditions is consistent
with (2.7 $\pm$ 0.7) $\times$ 10$^3$ km sec$^-1$. The new data also reveal a
prominent southern cold front, with potentially heated gas ahead of it. Abell
665 also hosts a giant radio halo. There is a hint of diffuse radio emission
extending to the shock at the north, which needs to be examined with better
radio data. This new strong shock provides a great opportunity to study the
re-acceleration model with the X-ray and radio data combined.
@misc{dasadia2016strong,
abstract = {Deep (103 ks) \chandra\ observations of Abell 665 have revealed rich
structures in this merging galaxy cluster, including a strong shock and two
cold fronts. The newly discovered shock has a Mach number of $M$ = 3.0 $\pm$
0.6, propagating in front of a cold disrupted cloud. This makes Abell~665 the
second cluster where a strong merger shock of $M \approx$ 3 has been detected,
after the Bullet cluster. The shock velocity from jump conditions is consistent
with (2.7 $\pm$ 0.7) $\times$ 10$^3$ km sec$^{-1}$. The new data also reveal a
prominent southern cold front, with potentially heated gas ahead of it. Abell
665 also hosts a giant radio halo. There is a hint of diffuse radio emission
extending to the shock at the north, which needs to be examined with better
radio data. This new strong shock provides a great opportunity to study the
re-acceleration model with the X-ray and radio data combined.},
added-at = {2016-03-07T08:53:00.000+0100},
author = {Dasadia, Sarthak and Sun, Ming and Sarazin, Craig and Morandi, Andrea and Markevitch, Maxim and Wik, Daniel and Feretti, Luigina and Giovannini, Gabriele and Govoni, Federica and Vacca, Valentina},
biburl = {https://www.bibsonomy.org/bibtex/2f978f04be215740d6cc628bf9cfd843b/miki},
description = {[1603.01271] A Strong Merger Shock in Abell 665},
interhash = {d5e3524b836f7cd3312f569f20acd440},
intrahash = {f978f04be215740d6cc628bf9cfd843b},
keywords = {cluster cold front merger shocks},
note = {cite arxiv:1603.01271Comment: Accepted for publication in ApJL},
timestamp = {2016-03-07T08:53:00.000+0100},
title = {A Strong Merger Shock in Abell 665},
url = {http://arxiv.org/abs/1603.01271},
year = 2016
}