dc.contributor.author | Fong, W. | |
dc.contributor.author | Metzger, B. D. | |
dc.contributor.author | Berger, Edo | |
dc.contributor.author | Ozel, Feryal | |
dc.date.accessioned | 2017-03-06T17:24:12Z | |
dc.date.issued | 2016 | |
dc.identifier.citation | Fong, W., B. D. Metzger, E. Berger, and F. Özel. 2016. Radio Constraints on Long-Lived Magnetar Remnants in Short Gamma-Ray Bursts. The Astrophysical Journal 831, no. 2: 141. doi:10.3847/0004-637x/831/2/141. | en_US |
dc.identifier.issn | 1538-4357 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:30510300 | |
dc.description.abstract | The merger of a neutron star binary may result in the formation of a rapidly-spinning magnetar. The magnetar can potentially survive for seconds or longer as a supramassive neutron star before collapsing to a black hole if, indeed, it collapses at all. During this process, a fraction of the magnetar’s rotational energy of ∼ 1053 erg is transferred via magnetic spin-down to the surrounding ejecta. The resulting interaction between the ejecta and the surrounding circumburst medium powers a & year-long synchrotron radio transient. We present a search for radio emission with the Very Large Array following nine short-duration gamma-ray bursts (GRBs) at restframe times of ≈ 1.3−7.6 years after the bursts, focusing on those events which exhibit early-time excess X-ray emission that may signify the presence of magnetars. We place upper limits of . 18 − 32µJy on the 6.0 GHz radio emission, corresponding to spectral luminosities of . (0.05 − 8.3)×1039 erg s−1. Comparing these limits to the predicted radio emission from a long-lived remnant and incorporating measurements of the circumburst densities from broad-band modeling of short GRB afterglows, we rule out a stable magnetar with an energy of 1053 erg for half of the events in our sample. A supramassive remnant that injects a lower rotational energy of 1052 erg is ruled out for a single event, GRB 050724A. This study represents the deepest and most extensive search for long-term radio emission following short GRBs to date, and thus the most stringent limits placed on the physical properties of magnetars associated with short GRBs from radio observations. | en_US |
dc.description.sponsorship | Astronomy | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Astronomical Society | en_US |
dc.relation.isversionof | doi:10.3847/0004-637x/831/2/141 | en_US |
dc.relation.hasversion | https://arxiv.org/pdf/1607.00416.pdf | en_US |
dash.license | OAP | |
dc.title | Radio Constraints on Long-Lived Magnetar Remnants in Short Gamma-Ray Bursts | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Author's Original | en_US |
dc.relation.journal | The Astrophysical Journal | en_US |
dash.depositing.author | Berger, Edo | |
dc.date.available | 2017-03-06T17:24:12Z | |
dc.identifier.doi | 10.3847/0004-637x/831/2/141 | * |
dash.authorsordered | false | |
dash.contributor.affiliated | Özel, Feryal | |
dash.contributor.affiliated | Berger, Edo | |