A Turnover in the Radio Light Curve of GW170817
We present 2-9 GHz radio observations of GW170817 covering the period 125-200 days post-merger, taken with the Australia Telescope Compact Array (ATCA) and the Karl G. Jansky Very Large Array (VLA). Our observations demonstrate that the radio afterglow peaked at 149 ±2 days post-merger and is now de...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
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Institute of Physics Publishing
2018
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| Online Access: | http://hdl.handle.net/20.500.11937/68333 |
| _version_ | 1848762022322241536 |
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| author | Dobie, D. Kaplan, D. Murphy, T. Lenc, E. Mooley, K. Lynch, Christene Corsi, A. Frail, D. Kasliwal, M. Hallinan, G. |
| author_facet | Dobie, D. Kaplan, D. Murphy, T. Lenc, E. Mooley, K. Lynch, Christene Corsi, A. Frail, D. Kasliwal, M. Hallinan, G. |
| author_sort | Dobie, D. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present 2-9 GHz radio observations of GW170817 covering the period 125-200 days post-merger, taken with the Australia Telescope Compact Array (ATCA) and the Karl G. Jansky Very Large Array (VLA). Our observations demonstrate that the radio afterglow peaked at 149 ±2 days post-merger and is now declining in flux density. We see no evidence for evolution in the radio-only spectral index, which remains consistent with optically thin synchrotron emission connecting the radio, optical, and X-ray regimes. The peak implies a total energy in the synchrotron-emitting component of a few × 1050erg. The temporal decay rate is most consistent with mildly or non-relativistic material and we do not see evidence for a very energetic off-axis jet, but we cannot distinguish between a lower-energy jet and more isotropic emission. |
| first_indexed | 2025-11-14T10:40:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-68333 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:40:57Z |
| publishDate | 2018 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-683332018-09-13T06:19:27Z A Turnover in the Radio Light Curve of GW170817 Dobie, D. Kaplan, D. Murphy, T. Lenc, E. Mooley, K. Lynch, Christene Corsi, A. Frail, D. Kasliwal, M. Hallinan, G. We present 2-9 GHz radio observations of GW170817 covering the period 125-200 days post-merger, taken with the Australia Telescope Compact Array (ATCA) and the Karl G. Jansky Very Large Array (VLA). Our observations demonstrate that the radio afterglow peaked at 149 ±2 days post-merger and is now declining in flux density. We see no evidence for evolution in the radio-only spectral index, which remains consistent with optically thin synchrotron emission connecting the radio, optical, and X-ray regimes. The peak implies a total energy in the synchrotron-emitting component of a few × 1050erg. The temporal decay rate is most consistent with mildly or non-relativistic material and we do not see evidence for a very energetic off-axis jet, but we cannot distinguish between a lower-energy jet and more isotropic emission. 2018 Journal Article http://hdl.handle.net/20.500.11937/68333 10.3847/2041-8213/aac105 Institute of Physics Publishing fulltext |
| spellingShingle | Dobie, D. Kaplan, D. Murphy, T. Lenc, E. Mooley, K. Lynch, Christene Corsi, A. Frail, D. Kasliwal, M. Hallinan, G. A Turnover in the Radio Light Curve of GW170817 |
| title | A Turnover in the Radio Light Curve of GW170817 |
| title_full | A Turnover in the Radio Light Curve of GW170817 |
| title_fullStr | A Turnover in the Radio Light Curve of GW170817 |
| title_full_unstemmed | A Turnover in the Radio Light Curve of GW170817 |
| title_short | A Turnover in the Radio Light Curve of GW170817 |
| title_sort | turnover in the radio light curve of gw170817 |
| url | http://hdl.handle.net/20.500.11937/68333 |