Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis
Context. Galaxy clusters undergo mergers that can generate extended radio sources called radio relics. Radio relics are the consequence of merger-induced shocks that propagate in the intra cluster medium (ICM). Aims. In this paper we analyse the radio, optical and X-ray data from a candidate galaxy...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
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EDP Sciences
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/74753 |
| _version_ | 1848763362799779840 |
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| author | De Gasperin, F. Intema, Hubertus Ridl, J. Salvato, M. Van Weeren, R. Bonafede, A. Greiner, J. Cassano, R. Brüggen, M. |
| author_facet | De Gasperin, F. Intema, Hubertus Ridl, J. Salvato, M. Van Weeren, R. Bonafede, A. Greiner, J. Cassano, R. Brüggen, M. |
| author_sort | De Gasperin, F. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Context. Galaxy clusters undergo mergers that can generate extended radio sources called radio relics. Radio relics are the consequence of merger-induced shocks that propagate in the intra cluster medium (ICM). Aims. In this paper we analyse the radio, optical and X-ray data from a candidate galaxy cluster that has been selected from the radio emission coming from a candidate radio relic detected in NRAO VLA Sky Survey (NVSS). Our aim is to clarify the nature of this source and prove that under certain conditions radio emission from radio relics can be used to trace relatively low-mass galaxy clusters. Methods. We observed the candidate galaxy cluster with the Giant Meterwave Radio Telescope (GMRT) at three different frequencies. These datasets have been analysed together with archival data from ROSAT in the X-ray and with archival data from the Gamma-Ray Burst Optical/Near-Infrared Detector (GROND) telescope in four different optical bands. Results. We confirm the presence of a 1 Mpc long radio relic located in the outskirts of a previously unknown galaxy cluster. We confirm the presence of the galaxy cluster through dedicated optical observations and using archival X-ray data. Due to its proximity and similar redshift to a known Abell cluster, we named it Abell 3527-bis. The galaxy cluster is amongst the least massive clusters known to host a radio relic. Conclusions. We showed that radio relics can be effectively used to trace a subset of relatively low-mass galaxy clusters that might have gone undetected in X-ray or Sunyaev-Zel'dovich (SZ) surveys. This technique might be used in future deep, low-frequency surveys such as those carried on by the Low Frequency Array (LOFAR), the Upgraded GMRT (uGMRT) and, ultimately, the Square Kilometre Array (SKA). |
| first_indexed | 2025-11-14T11:02:16Z |
| format | Journal Article |
| id | curtin-20.500.11937-74753 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:02:16Z |
| publishDate | 2017 |
| publisher | EDP Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-747532019-03-12T06:13:05Z Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis De Gasperin, F. Intema, Hubertus Ridl, J. Salvato, M. Van Weeren, R. Bonafede, A. Greiner, J. Cassano, R. Brüggen, M. Context. Galaxy clusters undergo mergers that can generate extended radio sources called radio relics. Radio relics are the consequence of merger-induced shocks that propagate in the intra cluster medium (ICM). Aims. In this paper we analyse the radio, optical and X-ray data from a candidate galaxy cluster that has been selected from the radio emission coming from a candidate radio relic detected in NRAO VLA Sky Survey (NVSS). Our aim is to clarify the nature of this source and prove that under certain conditions radio emission from radio relics can be used to trace relatively low-mass galaxy clusters. Methods. We observed the candidate galaxy cluster with the Giant Meterwave Radio Telescope (GMRT) at three different frequencies. These datasets have been analysed together with archival data from ROSAT in the X-ray and with archival data from the Gamma-Ray Burst Optical/Near-Infrared Detector (GROND) telescope in four different optical bands. Results. We confirm the presence of a 1 Mpc long radio relic located in the outskirts of a previously unknown galaxy cluster. We confirm the presence of the galaxy cluster through dedicated optical observations and using archival X-ray data. Due to its proximity and similar redshift to a known Abell cluster, we named it Abell 3527-bis. The galaxy cluster is amongst the least massive clusters known to host a radio relic. Conclusions. We showed that radio relics can be effectively used to trace a subset of relatively low-mass galaxy clusters that might have gone undetected in X-ray or Sunyaev-Zel'dovich (SZ) surveys. This technique might be used in future deep, low-frequency surveys such as those carried on by the Low Frequency Array (LOFAR), the Upgraded GMRT (uGMRT) and, ultimately, the Square Kilometre Array (SKA). 2017 Journal Article http://hdl.handle.net/20.500.11937/74753 10.1051/0004-6361/201628945 EDP Sciences fulltext |
| spellingShingle | De Gasperin, F. Intema, Hubertus Ridl, J. Salvato, M. Van Weeren, R. Bonafede, A. Greiner, J. Cassano, R. Brüggen, M. Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis |
| title | Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis |
| title_full | Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis |
| title_fullStr | Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis |
| title_full_unstemmed | Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis |
| title_short | Tracing low-mass galaxy clusters using radio relics: The discovery of Abell 3527-bis |
| title_sort | tracing low-mass galaxy clusters using radio relics: the discovery of abell 3527-bis |
| url | http://hdl.handle.net/20.500.11937/74753 |