2010ApJ...710.1776J


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST12:01:34

2010ApJ...710.1776J - Astrophys. J., 710, 1776-1785 (2010/February-3)

Core gas sloshing in Abell 1644.

JOHNSON R.E., MARKEVITCH M., WEGNER G.A., JONES C. and FORMAN W.R.

Abstract (from CDS):

We present an analysis of a 72 ks Chandra observation of the double cluster Abell 1644 (z = 0.047). The X-ray temperatures indicate that the masses are M500= (2.6±0.4)x1014 h–1 M for the northern sub-cluster and M500= (3.1±0.4)x1014 h–1 M for the southern, main cluster. We identify a sharp edge in the radial X-ray surface brightness of the main cluster, which we find to be a cold front, with a jump in temperature of a factor of ∼3. This edge possesses a spiral morphology characteristic of core gas sloshing around the cluster potential minimum. We present observational evidence, supported by hydrodynamic simulations, that the northern sub-cluster is the object that initiated the core gas sloshing in the main cluster at least 700 Myr ago. We discuss reheating of the main cluster's core gas via two mechanisms brought about by the sloshing gas: first, the release of gravitational potential energy gained by the core's displacement from the potential minimum, and second, a dredging inward of the outer, higher entropy cluster gas along finger-shaped streams. We find that the available gravitational potential energy is small compared to the energy released by the cooling gas in the core.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Abell 1644 - galaxies: interactions - X-rays: galaxies: clusters

CDS comments: In SIMBAD, A1644-S is ACO 1644 and A1644-N is 2E 2919.

Simbad objects: 6

goto Full paper

goto View the reference in ADS

Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ClG 0657-56 ClG 06 58 29.6 -55 56 39           ~ 830 1
2 NAME Hya A LIN 09 18 05.651 -12 05 43.99   14.38 14.8     ~ 927 1
3 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 338 1
4 2E 2919 ClG 12 57 48.1 -17 16 28           ~ 3 0
5 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1181 0
6 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 574 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2010ApJ...710.1776J and select 'bookmark this link' or equivalent in the popup menu


2021.04.18-12:01:34

© Université de Strasbourg/CNRS

    • Contact