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2012MNRAS.426.1992H - Mon. Not. R. Astron. Soc., 426, 1992-2002 (2012/November-1)
An x-ray/optical study of the geometry and dynamics of MACSJ0140.0-0555, a massive post-collision cluster merger.
HO I.-T., EBELING H. and RICHARD J.
Abstract (from CDS):
Although all optical and X-ray properties of MACSJ0140.0-0555 are consistent with a well-advanced head-on merger proceeding along an axis close to the plane of the sky, the degeneracy between Hubble flow and peculiar velocity prevents us from obtaining a quantitative constraint on the inclination angle of the merger axis. The lack of pronounced substructure in the cluster gas distribution and the proximity of the two optical cluster cores both in projection and in radial velocity suggest that the merger is observed well after the primary collision and, possibly, after turnaround. A weak-lensing analysis of the mass distribution in MACSJ0140.0-0555 has the potential of yielding constraints on the self-interaction cross-section of dark matter similar to those obtained for MACSJ0025.4-1222, although the smaller projected separation of the two cluster components makes the measurement more challenging.
Abstract Copyright: © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS
Journal keyword(s): galaxies: clusters: individual: MACSJ0140.0-0555 SAO {undingnumber GO1-12153X}
Nomenclature: Table 2: [HER2012] JHHMMSS.ss+DDMMSS.ss N=72.
Simbad objects: 75
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