Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster
We present a low-frequency view of the Perseus cluster with new observations from the Karl G. Jansky Very Large Array (JVLA) at 230-470 MHz. The data reveal a multitude of new structures associated with the mini-halo. The mini-halo seems to be influenced both by the AGN activity and the sloshing mot...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
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Oxford University Press
2017
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| Online Access: | http://hdl.handle.net/20.500.11937/74589 |
| _version_ | 1848763317552676864 |
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| author | Gendron-Marsolais, M. Hlavacek-Larrondo, J. van Weeren, R. Clarke, T. Fabian, A. Intema, Hubertus Taylor, G. Blundell, K. Sanders, J. |
| author_facet | Gendron-Marsolais, M. Hlavacek-Larrondo, J. van Weeren, R. Clarke, T. Fabian, A. Intema, Hubertus Taylor, G. Blundell, K. Sanders, J. |
| author_sort | Gendron-Marsolais, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present a low-frequency view of the Perseus cluster with new observations from the Karl G. Jansky Very Large Array (JVLA) at 230-470 MHz. The data reveal a multitude of new structures associated with the mini-halo. The mini-halo seems to be influenced both by the AGN activity and the sloshing motion of the cool core cluster's gas. In addition, it has a filamentary structure similar to that seen in radio relics found in merging clusters. We present a detailed description of the data reduction and imaging process of the dataset. The depth and resolution of the observations allow us to conduct for the first time a detailed comparison of the mini-halo structure with the X-ray structure as seen in the Chandra X-ray images. The resulting image very clearly shows that the mini-halo emission is mostly contained behind the western cold front, similar to that predicted by simulations of gas sloshing in galaxy clusters, but fainter emission is also seen beyond, as if particles are leaking out. However, due to the proximity of the Perseus cluster, as well as the quality of the data at low radio frequencies and at X-ray wavelengths, we also find evidence of fine structure. This structure includes several radial radio filaments extending in different directions, a concave radio structure associated with the southern X-ray bay and sharp radio edges that correlate with X-ray edges. Minihaloes are therefore not simply diffuse, uniform radio sources, but rather have a rich variety of complex structures. These results illustrate the high-quality images that can be obtained with the new JVLA at low radio frequencies, as well as the necessity to obtain deeper, higher fidelity radio images of mini-haloes in clusters to further understand their origin. |
| first_indexed | 2025-11-14T11:01:33Z |
| format | Journal Article |
| id | curtin-20.500.11937-74589 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T11:01:33Z |
| publishDate | 2017 |
| publisher | Oxford University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-745892019-03-13T01:51:45Z Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster Gendron-Marsolais, M. Hlavacek-Larrondo, J. van Weeren, R. Clarke, T. Fabian, A. Intema, Hubertus Taylor, G. Blundell, K. Sanders, J. We present a low-frequency view of the Perseus cluster with new observations from the Karl G. Jansky Very Large Array (JVLA) at 230-470 MHz. The data reveal a multitude of new structures associated with the mini-halo. The mini-halo seems to be influenced both by the AGN activity and the sloshing motion of the cool core cluster's gas. In addition, it has a filamentary structure similar to that seen in radio relics found in merging clusters. We present a detailed description of the data reduction and imaging process of the dataset. The depth and resolution of the observations allow us to conduct for the first time a detailed comparison of the mini-halo structure with the X-ray structure as seen in the Chandra X-ray images. The resulting image very clearly shows that the mini-halo emission is mostly contained behind the western cold front, similar to that predicted by simulations of gas sloshing in galaxy clusters, but fainter emission is also seen beyond, as if particles are leaking out. However, due to the proximity of the Perseus cluster, as well as the quality of the data at low radio frequencies and at X-ray wavelengths, we also find evidence of fine structure. This structure includes several radial radio filaments extending in different directions, a concave radio structure associated with the southern X-ray bay and sharp radio edges that correlate with X-ray edges. Minihaloes are therefore not simply diffuse, uniform radio sources, but rather have a rich variety of complex structures. These results illustrate the high-quality images that can be obtained with the new JVLA at low radio frequencies, as well as the necessity to obtain deeper, higher fidelity radio images of mini-haloes in clusters to further understand their origin. 2017 Journal Article http://hdl.handle.net/20.500.11937/74589 10.1093/MNRAS/STX1042 Oxford University Press fulltext |
| spellingShingle | Gendron-Marsolais, M. Hlavacek-Larrondo, J. van Weeren, R. Clarke, T. Fabian, A. Intema, Hubertus Taylor, G. Blundell, K. Sanders, J. Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster |
| title | Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster |
| title_full | Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster |
| title_fullStr | Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster |
| title_full_unstemmed | Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster |
| title_short | Deep 230-470 MHz VLA observations of the mini-halo in the Perseus cluster |
| title_sort | deep 230-470 mhz vla observations of the mini-halo in the perseus cluster |
| url | http://hdl.handle.net/20.500.11937/74589 |