Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT
Studies have shown that mergers of massive galaxy clusters produce shocks and turbulence in the intra-cluster medium, the possible event that creates radio relics, as well as the radio halos. Here we present GMRT dual-band (235 and 610~MHz) radio observations of four such clusters from the MAssive C...
| Main Authors: | , , , |
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| Format: | Journal Article |
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| Online Access: | http://hdl.handle.net/20.500.11937/76029 |
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| author | Paul, Surajit Salunkhe, Sameer Datta, Abhirup Intema, Huib |
| author_facet | Paul, Surajit Salunkhe, Sameer Datta, Abhirup Intema, Huib |
| author_sort | Paul, Surajit |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Studies have shown that mergers of massive galaxy clusters produce shocks and turbulence in the intra-cluster medium, the possible event that creates radio relics, as well as the radio halos. Here we present GMRT dual-band (235 and 610~MHz) radio observations of four such clusters from the MAssive Cluster Survey (MACS) catalogue. We report the discovery of a very faint, diffuse, elongated radio source with a projected size of about 0.5~Mpc in cluster MACSJ0152.5-2852. We also confirm the presence of a radio relic-like source (about 0.4~Mpc, previously reported at 325~MHz) in MACSJ0025.4-1222 cluster. Proposed relics in both these clusters are found apparently inside the virial radius instead of their usual peripheral location, while no radio halos are detected. These high-redshift clusters (z=0.584 and 0.413) are among the earliest merging systems detected with cluster radio emissions. In MACSJ1931-2635 cluster, we found a radio mini-halo and an interesting highly bent pair of radio jets. Further, we present here a maiden study of low frequency (GMRT 235&610~MHz) spectral and morphological signatures of a previously known radio cluster MACSJ0014.3-3022 (Abell~2744). This cluster hosts a relatively flat spectrum (α610235∼−1.15), giant (∼1.6~Mpc each) halo-relic structure and a close-by high-speed (1769±148359~km~s−1) merger-shock (M=2.02±0.170.41) originated from a possible second merger in the cluster. |
| first_indexed | 2025-11-14T11:06:10Z |
| format | Journal Article |
| id | curtin-20.500.11937-76029 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:06:10Z |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-760292023-02-22T06:24:25Z Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT Paul, Surajit Salunkhe, Sameer Datta, Abhirup Intema, Huib astro-ph.HE astro-ph.HE astro-ph.CO Studies have shown that mergers of massive galaxy clusters produce shocks and turbulence in the intra-cluster medium, the possible event that creates radio relics, as well as the radio halos. Here we present GMRT dual-band (235 and 610~MHz) radio observations of four such clusters from the MAssive Cluster Survey (MACS) catalogue. We report the discovery of a very faint, diffuse, elongated radio source with a projected size of about 0.5~Mpc in cluster MACSJ0152.5-2852. We also confirm the presence of a radio relic-like source (about 0.4~Mpc, previously reported at 325~MHz) in MACSJ0025.4-1222 cluster. Proposed relics in both these clusters are found apparently inside the virial radius instead of their usual peripheral location, while no radio halos are detected. These high-redshift clusters (z=0.584 and 0.413) are among the earliest merging systems detected with cluster radio emissions. In MACSJ1931-2635 cluster, we found a radio mini-halo and an interesting highly bent pair of radio jets. Further, we present here a maiden study of low frequency (GMRT 235&610~MHz) spectral and morphological signatures of a previously known radio cluster MACSJ0014.3-3022 (Abell~2744). This cluster hosts a relatively flat spectrum (α610235∼−1.15), giant (∼1.6~Mpc each) halo-relic structure and a close-by high-speed (1769±148359~km~s−1) merger-shock (M=2.02±0.170.41) originated from a possible second merger in the cluster. Journal Article http://hdl.handle.net/20.500.11937/76029 10.1093/mnras/stz1965 unknown |
| spellingShingle | astro-ph.HE astro-ph.HE astro-ph.CO Paul, Surajit Salunkhe, Sameer Datta, Abhirup Intema, Huib Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT |
| title | Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT |
| title_full | Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT |
| title_fullStr | Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT |
| title_full_unstemmed | Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT |
| title_short | Low-frequency radio study of MACS clusters at 610 and 235 MHz using the GMRT |
| title_sort | low-frequency radio study of macs clusters at 610 and 235 mhz using the gmrt |
| topic | astro-ph.HE astro-ph.HE astro-ph.CO |
| url | http://hdl.handle.net/20.500.11937/76029 |