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dc.date.accessioned | 2019-12-13T17:46:05Z | |
dc.date.available | 2019-12-13T17:46:05Z | |
dc.date.issued | 2017-10-20 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/87414 | |
dc.description.abstract | On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40 8 8-+ Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 M. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One-Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient's position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta. | en |
dc.language | en | es |
dc.subject | Gravitational waves | es |
dc.subject | Stars: neutron | es |
dc.title | Multi-messenger observations of a binary neutron star merger | en |
dc.type | Articulo | es |
sedici.identifier.other | doi:10.3847/2041-8213/aa91c9 | es |
sedici.identifier.other | eid:2-s2.0-85037171677 | es |
sedici.identifier.issn | 2041-8205 | es |
sedici.creator.person | Dova, María Teresa | es |
sedici.creator.person | Hansen, Patricia María | es |
sedici.creator.person | Mariazzi, Analisa Gabriela | es |
sedici.creator.person | Sciutto, Sergio Juan | es |
sedici.creator.person | Tueros, Matías Jorge | es |
sedici.creator.person | Vergara Quispe, Indira Dajhana | es |
sedici.creator.person | Wahlberg, Hernán Pablo | es |
sedici.creator.corporate | The Pierre Auger Collaboration | es |
sedici.description.note | La lista completa de autores que integran el documento puede consultarse en el archivo asociado a este ítem. | es |
sedici.subject.materias | Física | es |
sedici.subject.materias | Ciencias Exactas | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto de Física La Plata | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution 4.0 International (CC BY 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Astrophysical Journal Letters | es |
sedici.relation.journalVolumeAndIssue | vol. 848, no. 2 | es |
sedici.rights.sherpa | * Color: green * Pre-print del autor: si * Post-print del autor: si * Versión de editor/PDF:si * Condiciones: >>On any website, arXiv, scientific social networks (except Research Gate) or non-commercial open access repository. >>Publisher's version/PDF may be used on any website or authors' institutional repository >>Publisher copyright and source must be acknowledged >>Must link to publisher version >>Publisher's version/PDF may be used >>Authors depositing in arXiv must they choose the first licence statement offered by arXiv when uploading their article � a "non-exclusive licence to distribute" >>Publisher last contacted on 10/02/2016 >>Publisher last reviewed on 15/08/2017 * Link a Sherpa: http://sherpa.ac.uk/romeo/issn/2041-8205/es/ |