2010MNRAS.408..199B

Query : 2010MNRAS.408..199B

2010MNRAS.408..199B - Mon. Not. R. Astron. Soc., 408, 199-212 (2010/October-2)

Cold fronts by merging of shocks.

BIRNBOIM Y., KESHET U. and HERNQUIST L.

Abstract (from CDS):

Cold fronts (CFs) are found in most galaxy clusters, as well as in some galaxies and groups of galaxies. We propose that some CFs are relics of merging between two shocks propagating in the same direction. Such shock mergers typically result in a quasi-spherical, a factor of ~1.4-2.7 discontinuity in density and in temperature. These CFs may be found as far out as the virial shock, unlike what is expected in other CF formation models.

As a demonstration of this effect, we use 1D simulations of clusters and show that shock-induced CFs form when perturbations such as explosions or mergers occur near the cluster's centre. Perturbations at a cluster's core induce periodic merging between the virial shock and outgoing secondary shocks. These collisions yield a distinctive, concentric, geometric sequence of CFs which trace the expansion of the virial shock.


Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): shock waves - galaxies: clusters: general - galaxies: haloes - X-rays: galaxies: clusters

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ACO 426 ClG 03 19 47.6 +41 30 54           ~ 2508 1
2 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
3 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
4 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
5 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 284 0

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