ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7
Aims. We investigate the possible presence of diffuse radio emission in the intermediate redshift, massive cluster PLCK G285.0-23.7 (z = 0.39, M500 = 8.39 × 1014M?). Methods. Our 16 cm-band ATCA observations of PLCK G285.0-23.7 allow us to reach a rms noise level of ~11 µJy/beam on the wide-band (1....
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Journal Article |
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EDP Sciences
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/73705 |
| _version_ | 1848763076318330880 |
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| author | Aviles, G. Ferrari, C. Johnston-Hollitt, M. Pratley, L. Macario, G. Venturi, T. Brunetti, G. Cassano, R. Dallacasa, D. Intema, Hubertus Giacintucci, S. Hurier, G. Aghanim, N. Douspis, M. Langer, M. |
| author_facet | Aviles, G. Ferrari, C. Johnston-Hollitt, M. Pratley, L. Macario, G. Venturi, T. Brunetti, G. Cassano, R. Dallacasa, D. Intema, Hubertus Giacintucci, S. Hurier, G. Aghanim, N. Douspis, M. Langer, M. |
| author_sort | Aviles, G. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Aims. We investigate the possible presence of diffuse radio emission in the intermediate redshift, massive cluster PLCK G285.0-23.7 (z = 0.39, M500 = 8.39 × 1014M?). Methods. Our 16 cm-band ATCA observations of PLCK G285.0-23.7 allow us to reach a rms noise level of ~11 µJy/beam on the wide-band (1.1-3.1 GHz), full-resolution (~5 arcsec) image of the cluster, making it one of the deepest ATCA images yet published. We also re-image visibilities at lower resolution in order to achieve a better sensitivity to low-surface-brightness extended radio sources. Results. We detect one of the lowest luminosity radio halos known at z > 0.35, characterised by a slight offset from the well-studied 1.4 GHz radio power vs. cluster mass correlation. Similarly to most known radio-loud clusters (i.e. those hosting diffuse non-thermal sources), PLCK G285.0-23.7 has a disturbed dynamical state. Our analysis reveals a similarly elongated X-ray and radio morphology. While the size of the radio halo in PLCK G285.0-23.7 is smaller than lower redshift radio-loud clusters in the same mass range, it shows a similar correlation with the cluster virial radius, as expected in the framework of hierarchical structure formation. |
| first_indexed | 2025-11-14T10:57:42Z |
| format | Journal Article |
| id | curtin-20.500.11937-73705 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:57:42Z |
| publishDate | 2016 |
| publisher | EDP Sciences |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-737052019-03-12T06:29:20Z ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 Aviles, G. Ferrari, C. Johnston-Hollitt, M. Pratley, L. Macario, G. Venturi, T. Brunetti, G. Cassano, R. Dallacasa, D. Intema, Hubertus Giacintucci, S. Hurier, G. Aghanim, N. Douspis, M. Langer, M. Aims. We investigate the possible presence of diffuse radio emission in the intermediate redshift, massive cluster PLCK G285.0-23.7 (z = 0.39, M500 = 8.39 × 1014M?). Methods. Our 16 cm-band ATCA observations of PLCK G285.0-23.7 allow us to reach a rms noise level of ~11 µJy/beam on the wide-band (1.1-3.1 GHz), full-resolution (~5 arcsec) image of the cluster, making it one of the deepest ATCA images yet published. We also re-image visibilities at lower resolution in order to achieve a better sensitivity to low-surface-brightness extended radio sources. Results. We detect one of the lowest luminosity radio halos known at z > 0.35, characterised by a slight offset from the well-studied 1.4 GHz radio power vs. cluster mass correlation. Similarly to most known radio-loud clusters (i.e. those hosting diffuse non-thermal sources), PLCK G285.0-23.7 has a disturbed dynamical state. Our analysis reveals a similarly elongated X-ray and radio morphology. While the size of the radio halo in PLCK G285.0-23.7 is smaller than lower redshift radio-loud clusters in the same mass range, it shows a similar correlation with the cluster virial radius, as expected in the framework of hierarchical structure formation. 2016 Journal Article http://hdl.handle.net/20.500.11937/73705 10.1051/0004-6361/201628788 EDP Sciences fulltext |
| spellingShingle | Aviles, G. Ferrari, C. Johnston-Hollitt, M. Pratley, L. Macario, G. Venturi, T. Brunetti, G. Cassano, R. Dallacasa, D. Intema, Hubertus Giacintucci, S. Hurier, G. Aghanim, N. Douspis, M. Langer, M. ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 |
| title | ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 |
| title_full | ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 |
| title_fullStr | ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 |
| title_full_unstemmed | ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 |
| title_short | ATCA observations of the MACS- Planck Radio Halo Cluster Project: I. New detection of a radio halo in PLCK G285.0-23.7 |
| title_sort | atca observations of the macs- planck radio halo cluster project: i. new detection of a radio halo in plck g285.0-23.7 |
| url | http://hdl.handle.net/20.500.11937/73705 |