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http://hdl.handle.net/20.500.12386/24767
Titolo: | A M ≳ 3 shock in `El Gordo' cluster and the origin of the radio relic | Autori: | Botteon, A. GASTALDELLO, FABIO BRUNETTI, GIANFRANCO Kale, R. |
Data pubblicazione: | 2016 | Rivista: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | Numero: | 463 | Fascicolo: | 2 | Da pagina:: | 1534 | Abstract: | We present an X-ray and radio study of the famous `El Gordo', a massive and distant (z = 0.87) galaxy cluster. In the deep (340 ks) Chandra observation, the cluster appears with an elongated and cometary morphology, a sign of its current merging state. The GMRT radio observations at 610 MHz confirm the presence of a radio halo, which remarkably overlaps the X-ray cluster emission and connects a couple of radio relics. We detect a strong shock (M≳3) in the NW periphery of the cluster, co-spatially located with the radio relic. This is the most distant (z = 0.87) and one of the strongest shocks detected in a galaxy cluster. This work supports the relic-shock connection and allows us to investigate the origin of these radio sources in an uncommon regime of M≳3. For this particular case we found that shock acceleration from the thermal pool is still a viable possibility. | URI: | http://hdl.handle.net/20.500.12386/24767 | URL: | https://academic.oup.com/mnras/article/463/2/1534/2892606 | ISSN: | 0035-8711 | DOI: | 10.1093/mnras/stw2089 | Bibcode ADS: | 2016MNRAS.463.1534B | Fulltext: | open |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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Monthly Notices of the Royal Astronomical Society 2016 Botteon.pdf | PDF editoriale | 2.12 MB | Adobe PDF | Visualizza/apri |
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