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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Simulations of gas sloshing in galaxy cluster Abell 2052

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Machado, Rubens E. G. [1] ; Lima Neto, Gastao B. [1]
Total Authors: 2
[1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 447, n. 3, p. 2915-2924, MAR 1 2015.
Web of Science Citations: 10

The intracluster plasma of Abell 2052 exhibits in X-rays a spiral structure extending more than 250 kpc, which is comprised of cool gas. This feature is understood to be the result of gas sloshing caused by the off-axis collision with a smaller subcluster. We aim to recover the dynamical history of Abell 2052 and to reproduce the broad morphology of the spiral feature. To this end, we perform hydrodynamical N-body simulations of cluster collisions. We obtain two regimes that adequately reproduce the desired features. The first scenario is a close encounter and a recent event (0.8 Gyr since pericentric passage), while the second scenario has a larger impact parameter and is older (almost 2.6 Gyr since pericentric passage). In the second case, the simulation predicts that the perturbing subcluster should be located approximately 2 Mpc from the centre of the major cluster. At that position, we are able to identify an observed optical counterpart at the same redshift: a galaxy group with M-500 =(1.16 +/- 0.43) x10(13) M-circle dot. (AU)

FAPESP's process: 10/12277-9 - Numerical simulations of galaxy cluster mergers
Grantee:Rubens Eduardo Garcia Machado
Support type: Scholarships in Brazil - Post-Doctorate