Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9
Radio relics are diffuse radio sources observed in galaxy clusters, probably produced by shock acceleration during cluster-cluster mergers. Their large size, of the order of 1 Mpc, indicates that the emitting electrons need to be (re)accelerated locally. The usually invoked diffusive shock accelerat...
| Main Authors: | , , , , , , , |
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| Format: | Journal Article |
| Published: |
Institute of Physics Publishing
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/74569 |
| _version_ | 1848763312166141952 |
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| author | Bonafede, A. Intema, Hubertus Brüggen, M. Girardi, M. Nonino, M. Kantharia, N. Van Weeren, R. Röttgering, H. |
| author_facet | Bonafede, A. Intema, Hubertus Brüggen, M. Girardi, M. Nonino, M. Kantharia, N. Van Weeren, R. Röttgering, H. |
| author_sort | Bonafede, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Radio relics are diffuse radio sources observed in galaxy clusters, probably produced by shock acceleration during cluster-cluster mergers. Their large size, of the order of 1 Mpc, indicates that the emitting electrons need to be (re)accelerated locally. The usually invoked diffusive shock acceleration models have been challenged by recent observations and theory. We report the discovery of complex radio emission in the Galaxy cluster PLCKG287.0+32.9, which hosts two relics, a radio halo, and several radio filamentary emission. Optical observations suggest that the cluster is elongated, likely along an intergalactic filament, and displays a significant amount of substructure. The peculiar features of this radio relic are that (1) it appears to be connected to the lobes of a radio galaxy and (2) the radio spectrum steepens on either side of the radio relic. We discuss the origins of these features in the context of particle re-acceleration. © 2014. The American Astronomical Society. All rights reserved.. |
| first_indexed | 2025-11-14T11:01:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-74569 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:01:27Z |
| publishDate | 2014 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-745692019-07-22T03:52:29Z Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 Bonafede, A. Intema, Hubertus Brüggen, M. Girardi, M. Nonino, M. Kantharia, N. Van Weeren, R. Röttgering, H. Radio relics are diffuse radio sources observed in galaxy clusters, probably produced by shock acceleration during cluster-cluster mergers. Their large size, of the order of 1 Mpc, indicates that the emitting electrons need to be (re)accelerated locally. The usually invoked diffusive shock acceleration models have been challenged by recent observations and theory. We report the discovery of complex radio emission in the Galaxy cluster PLCKG287.0+32.9, which hosts two relics, a radio halo, and several radio filamentary emission. Optical observations suggest that the cluster is elongated, likely along an intergalactic filament, and displays a significant amount of substructure. The peculiar features of this radio relic are that (1) it appears to be connected to the lobes of a radio galaxy and (2) the radio spectrum steepens on either side of the radio relic. We discuss the origins of these features in the context of particle re-acceleration. © 2014. The American Astronomical Society. All rights reserved.. 2014 Journal Article http://hdl.handle.net/20.500.11937/74569 10.1088/0004-637X/785/1/1 Institute of Physics Publishing fulltext |
| spellingShingle | Bonafede, A. Intema, Hubertus Brüggen, M. Girardi, M. Nonino, M. Kantharia, N. Van Weeren, R. Röttgering, H. Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 |
| title | Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 |
| title_full | Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 |
| title_fullStr | Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 |
| title_full_unstemmed | Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 |
| title_short | Evidence for particle re-acceleration in the radio relic in the galaxy cluster PLCKG287.0+32.9 |
| title_sort | evidence for particle re-acceleration in the radio relic in the galaxy cluster plckg287.0+32.9 |
| url | http://hdl.handle.net/20.500.11937/74569 |