Статья

The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/Virgo GW170817. VIII. A Comparison to Cosmological Short-duration Gamma-Ray Bursts

Wen‐fai FongCenter for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USAE. BergerHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAP. K. BlanchardHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAR. MarguttiCenter for Interdisciplinary Exploration and Research in Astrophysics (CIERA) and Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, USAP. S. CowperthwaiteHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAR. ChornockAstrophysical Institute, Department of Physics and Astronomy, 251B Clippinger Lab, Ohio University, Athens, OH 45701, USAK. D. AlexanderHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAB. D. MetzgerDepartment of Physics and Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027, USAV. A. VillarHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAM. NichollHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAT. EftekhariHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAP. K. G. WilliamsHarvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USAJ. AnnisFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAD. BroutDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAD. A. BrownDepartment of Physics, Syracuse University, Syracuse NY 13224, USAH.-Y. ChenKavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USAZ. DoctorKavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USAH. T. DiehlFermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510, USAD. E. HolzEnrico Fermi Institute, Department of Physics, Department of Astronomy and Astrophysics, 5640 South Ellis Avenue, Chicago, IL 60637, USAA. RestDepartment of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218, USAM. SakoDepartment of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USAM. Soares-SantosDepartment of Physics, Brandeis University, Waltham, MA 02452, USA

2017en

ABI

Аннотация

Abstract We present a comprehensive comparison of the properties of the radio through X-ray counterpart of GW170817 and the properties of short-duration gamma-ray bursts (GRBs). For this effort, we utilize a sample of 36 short GRBs spanning a redshift range of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mi>z</mml:mi> <mml:mo>≈</mml:mo> <mml:mn>0.12</mml:mn> <mml:mo>–</mml:mo> <mml:mn>2.6</mml:mn> </mml:math> discovered over 2004–2017. We find that the counterpart to GW170817 has an isotropic-equivalent luminosity that is <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≈</mml:mo> <mml:mn>3000</mml:mn> </mml:math> times less than the median value of on-axis short GRB X-ray afterglows, and ≳10 4 times less than that for detected short GRB radio afterglows. Moreover, the allowed jet energies and particle densities inferred from the radio and X-ray counterparts to GW170817 and on-axis short GRB afterglows are remarkably similar, suggesting that viewing angle effects are the dominant, and perhaps only, difference in their observed radio and X-ray behavior. From comparison to previous claimed kilonovae following short GRBs, we find that the optical and near-infrared (NIR) counterpart to GW170817 is comparatively under-luminous by a factor of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≈</mml:mo> <mml:mn>3</mml:mn> <mml:mo>–</mml:mo> <mml:mn>5</mml:mn> </mml:math> , indicating a range of kilonova luminosities and timescales. A comparison of the optical limits following short GRBs on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mo>≲</mml:mo> <mml:mn>1</mml:mn> </mml:math> day timescales also rules out a “blue” kilonova of comparable optical isotropic-equivalent luminosity in one previous short GRB. Finally, we investigate the host galaxy of GW170817, NGC 4993, in the context of short GRB host galaxy stellar population properties. We find that NGC 4993 is superlative in terms of its large luminosity, old stellar population age, and low star formation rate compared to previous short GRB hosts. Additional events within the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo volume will be crucial in delineating the properties of the host galaxies of neutron star–neutron star (NS–NS) mergers, and connecting them to their cosmological counterparts.

Перевод пока недоступен

Идентификаторы

DOI: 10.3847/2041-8213/aa9018

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar