Detection of the third class of gamma-ray bursts: magnetar giant flares
| dc.contributor.author | Negro, Michela | |
| dc.contributor.author | Burns, Eric | |
| dc.date.accessioned | 2021-07-28T17:25:28Z | |
| dc.date.available | 2021-07-28T17:25:28Z | |
| dc.date.issued | 2021-07-12 | |
| dc.description | 37th International Cosmic Ray Conference (ICRC 2021) July 12th – 23rd, 2021 Online – Berlin, Germany | en_US |
| dc.description.abstract | Around 11.4 million years ago a young, highly magnetized neutron star called magnetar, in the Sculptor galaxy released an enormous amount of energy in the form of a giant flare. On April 15th 2020, some of the emitted photons were detected by a number of gamma-ray telescopes around Earth and Mars. While the analysis of this event, GRB 200415A, was interesting in its own right, it resulted in broader implications for both magnetar and gamma-ray burst (GRB) science. The resulting population study of magnetar giant flares (MGFs), led to the unambiguous identification of a distinct population of 4 local (< 5 Mpc) short GRBs. While identified solely based on alignment to nearby star-forming galaxies, their rise time and isotropic energy release are independently inconsistent with the larger short GRB population at > 99.9% confidence. These properties, the host galaxies, and non-detection in gravitational waves all point to an extragalactic MGF origin. The inferred volumetric rates for events above 4 × 10⁴⁴ erg of R = 3.8⁺⁴˙⁰ ₋₃.₁ ×10⁵ Gpc⁻³ yr⁻¹ place MGFs as the dominant gamma-ray transient that have been detected from extragalactic sources. As previously suggested, these rates imply that some magnetars produce multiple MGFs, providing a source of repeating GRBs. The rates and host galaxies favor common core-collapse supernova as key progenitors of magnetars. | en_US |
| dc.description.uri | https://pos.sissa.it/395/630/pdf | en_US |
| dc.format.extent | 6 pages | en_US |
| dc.genre | conference papers and proceedings | en_US |
| dc.identifier | doi:10.13016/m2ixhi-qv0a | |
| dc.identifier.citation | Negro, Michela; Burns, Eric; Detection of the third class of gamma-ray bursts: magnetar giant flares; 37th International Cosmic Ray Conference (ICRC 2021), 12 July, 2021; https://pos.sissa.it/395/630/pdf | en_US |
| dc.identifier.uri | http://hdl.handle.net/11603/22200 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | Proceedings of Science | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) | * |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
| dc.title | Detection of the third class of gamma-ray bursts: magnetar giant flares | en_US |
| dc.type | Text | en_US |