A Turnover in the Radio Light Curve of GW170817
dc.contributor.author | Dobie, D. | |
dc.contributor.author | Kaplan, D. | |
dc.contributor.author | Murphy, T. | |
dc.contributor.author | Lenc, E. | |
dc.contributor.author | Mooley, K. | |
dc.contributor.author | Lynch, Christene | |
dc.contributor.author | Corsi, A. | |
dc.contributor.author | Frail, D. | |
dc.contributor.author | Kasliwal, M. | |
dc.contributor.author | Hallinan, G. | |
dc.date.accessioned | 2018-08-08T04:40:59Z | |
dc.date.available | 2018-08-08T04:40:59Z | |
dc.date.created | 2018-08-08T03:50:45Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Dobie, D. and Kaplan, D. and Murphy, T. and Lenc, E. and Mooley, K. and Lynch, C. and Corsi, A. et al. 2018. A Turnover in the Radio Light Curve of GW170817. Astrophysical Journal Letters. 858 (2): Article ID L15. | |
dc.identifier.uri | http://hdl.handle.net/20.500.11937/68333 | |
dc.identifier.doi | 10.3847/2041-8213/aac105 | |
dc.description.abstract |
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. | |
dc.publisher | Institute of Physics Publishing | |
dc.title | A Turnover in the Radio Light Curve of GW170817 | |
dc.type | Journal Article | |
dcterms.source.volume | 858 | |
dcterms.source.number | 2 | |
dcterms.source.issn | 2041-8205 | |
dcterms.source.title | Astrophysical Journal Letters | |
curtin.note |
Copyright © 2018. The American Astronomical Society. All rights reserved. | |
curtin.department | Curtin Institute of Radio Astronomy (Physics) | |
curtin.accessStatus | Open access |