| Full text | |
| Author(s): |
Total Authors: 2
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| Affiliation: | [1] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, BR-05508090 Sao Paulo - Brazil
Total Affiliations: 1
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| 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 |
| Abstract | |
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 Opportunities: | Scholarships in Brazil - Post-Doctoral |