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Title: The Properties of Short Gamma-Ray Burst Jets Triggered by Neutron Star Mergers

Abstract

The most popular model for short gamma-ray bursts (sGRBs) involves the coalescence of binary neutron stars. Because the progenitor is actually hidden from view, we must consider under which circumstances such merging systems are capable of producing a successful sGRB. Soon after coalescence, winds are launched from the merger remnant. In this paper, we use realistic wind profiles derived from global merger simulations in order to investigate the interaction of sGRB jets with these winds using numerical simulations. We analyze the conditions for which these axisymmetric winds permit relativistic jets to break out and produce an sGRB. We find that jets with luminosities comparable to those observed in sGRBs are only successful when their half-opening angles are below ≈20°. This jet collimation mechanism leads to a simple physical interpretation of the luminosities and opening angles inferred for sGRBs. If wide, low-luminosity jets are observed, they might be indicative of a different progenitor avenue such as the merger of a neutron star with a black hole. We also use the observed durations of sGRB to place constraints on the lifetime of the wind phase, which is determined by the time it takes the jet to break out. In all cases wemore » find that the derived limits argue against completely stable remnants for binary neutron star mergers that produce sGRBs.« less

Authors:
; ;  [1];  [2]; ;  [3];  [4];  [5];  [6]
  1. Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)
  2. Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, A. P. 70-543 04510 D. F. (Mexico)
  3. Institute for Theoretical Physics, Goethe University, Max-von-Laue-Str. 1, D-60438 Frankfurt am Main (Germany)
  4. Astronomy and Oskar Klein Centre, Stockholm University, AlbaNova, SE-106 91 Stockholm (Sweden)
  5. Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt (Germany)
  6. Instituto de Astronomía, Universidad Nacional Autónoma de México, A. P. 70-264 04510 D. F. (Mexico)
Publication Date:
OSTI Identifier:
22654557
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal Letters; Journal Volume: 835; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AXIAL SYMMETRY; BLACK HOLES; COALESCENCE; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; COSMIC GAMMA BURSTS; GAMMA RADIATION; HYDRODYNAMICS; INTERACTIONS; LIMITING VALUES; LUMINOSITY; NEUTRON STARS; RELATIVISTIC RANGE; STELLAR WINDS

Citation Formats

Murguia-Berthier, Ariadna, Ramirez-Ruiz, Enrico, Montes, Gabriela, De Colle, Fabio, Rezzolla, Luciano, Takami, Kentaro, Rosswog, Stephan, Perego, Albino, and Lee, William H. The Properties of Short Gamma-Ray Burst Jets Triggered by Neutron Star Mergers. United States: N. p., 2017. Web. doi:10.3847/2041-8213/AA5B9E.
Murguia-Berthier, Ariadna, Ramirez-Ruiz, Enrico, Montes, Gabriela, De Colle, Fabio, Rezzolla, Luciano, Takami, Kentaro, Rosswog, Stephan, Perego, Albino, & Lee, William H. The Properties of Short Gamma-Ray Burst Jets Triggered by Neutron Star Mergers. United States. doi:10.3847/2041-8213/AA5B9E.
Murguia-Berthier, Ariadna, Ramirez-Ruiz, Enrico, Montes, Gabriela, De Colle, Fabio, Rezzolla, Luciano, Takami, Kentaro, Rosswog, Stephan, Perego, Albino, and Lee, William H. Wed . "The Properties of Short Gamma-Ray Burst Jets Triggered by Neutron Star Mergers". United States. doi:10.3847/2041-8213/AA5B9E.
@article{osti_22654557,
title = {The Properties of Short Gamma-Ray Burst Jets Triggered by Neutron Star Mergers},
author = {Murguia-Berthier, Ariadna and Ramirez-Ruiz, Enrico and Montes, Gabriela and De Colle, Fabio and Rezzolla, Luciano and Takami, Kentaro and Rosswog, Stephan and Perego, Albino and Lee, William H.},
abstractNote = {The most popular model for short gamma-ray bursts (sGRBs) involves the coalescence of binary neutron stars. Because the progenitor is actually hidden from view, we must consider under which circumstances such merging systems are capable of producing a successful sGRB. Soon after coalescence, winds are launched from the merger remnant. In this paper, we use realistic wind profiles derived from global merger simulations in order to investigate the interaction of sGRB jets with these winds using numerical simulations. We analyze the conditions for which these axisymmetric winds permit relativistic jets to break out and produce an sGRB. We find that jets with luminosities comparable to those observed in sGRBs are only successful when their half-opening angles are below ≈20°. This jet collimation mechanism leads to a simple physical interpretation of the luminosities and opening angles inferred for sGRBs. If wide, low-luminosity jets are observed, they might be indicative of a different progenitor avenue such as the merger of a neutron star with a black hole. We also use the observed durations of sGRB to place constraints on the lifetime of the wind phase, which is determined by the time it takes the jet to break out. In all cases we find that the derived limits argue against completely stable remnants for binary neutron star mergers that produce sGRBs.},
doi = {10.3847/2041-8213/AA5B9E},
journal = {Astrophysical Journal Letters},
number = 2,
volume = 835,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 2017},
month = {Wed Feb 01 00:00:00 EST 2017}
}