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http://hdl.handle.net/2289/6830| Title: | MACS J0553.4-3342: a young merging galaxy cluster caught through the eyes of Chandra and HST. |
| Authors: | Pandge, M.B. Bagchi, Joydeep Sonkamble, S.S. Parekh, Viral + 5 Co-authors |
| Keywords: | galaxies clusters |
| Issue Date: | Dec-2017 |
| Publisher: | Oxford University Press for The Royal Astronomical Society |
| Citation: | Monthly Notices of the Royal Astronomical Society, 2017, Vol. 472, p2042-2053 |
| Abstract: | We present a detailed analysis of a young merging galaxy cluster MACS J0553.4−3342 (z=0.43) from Chandra X-ray and Hubble Space Telescope archival data. X-ray observations confirm that the X-ray emitting intra-cluster medium (ICM) in this system is among the hottest (average T = 12.1 ± 0.6 keV) and most luminous known. Comparison of X-ray and optical images confirms that this system hosts two merging subclusters SC1 and SC2, separated by a projected distance of about 650 kpc. The subcluster SC2 is newly identified in this work, while another subcluster (SC0), previously thought to be a part of this merging system, is shown to be possibly a foreground object. Apart from two subclusters, we find a tail-like structure in the X-ray image, extending to a projected distance of ∼1 Mpc, along the north-east direction of the eastern subcluster (SC1). From a surface brightness analysis, we detect two sharp surface brightness edges at ∼40 (∼320 kpc) and ∼80 arcsec (∼640 kpc) to the east of SC1. The inner edge appears to be associated with a merger-driven cold front, while the outer one is likely to be due to a shock front, the presence of which, ahead of the cold front, makes this dynamically disturbed cluster interesting. Nearly all the early-type galaxies belonging to the two subclusters, including their brightest cluster galaxies, are part of a well-defined red sequence. |
| Description: | Open Access |
| URI: | http://hdl.handle.net/2289/6830 |
| ISSN: | 0035-8711 1365-2966 - (online) |
| Alternative Location: | http://adsabs.harvard.edu/abs/2017MNRAS.472.2042P https://arxiv.org/abs/1701.00197 http://dx.doi.org/10.1093/mnras/stx2028 |
| Copyright: | 2017 The authors & the Royal Astronomical Society |
| Appears in Collections: | Research Papers (A&A) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2017_MNRAS_472_2042.pdf | Open Access | 5.86 MB | Adobe PDF | View/Open |
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