GW170817: Implications for the local kilonova rate and for surveys from ground-based facilities
We compute the local rate of events similar to GRB 170817A, which has been recently found to be associated with a kilonova (KN) outburst. Our analysis finds an observed rate of such events of R KN ~ 352 -281 +810 Gpc -3 yr -1 . After comparing at their face values this density of sGRB outbursts with...
| Autores: | , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/195007 |
| Acceso en línea: | http://hdl.handle.net/10261/195007 |
| Access Level: | acceso abierto |
| Palabra clave: | Supernovae: general Gravitational waves Gamma-ray burst: general |
| Sumario: | We compute the local rate of events similar to GRB 170817A, which has been recently found to be associated with a kilonova (KN) outburst. Our analysis finds an observed rate of such events of R KN ~ 352 -281 +810 Gpc -3 yr -1 . After comparing at their face values this density of sGRB outbursts with the much higher density of binary neutron star (BNS) mergers of 1540 -1220 +3200 Gpc -3 yr -1 , estimated by LIGO-Virgo collaboration, one can conclude, admittedly with large uncertainty that either only a minor fraction of BNS mergers produces short gammaray bursts (sGRB)/KN events or the sGRBs associated with BNS mergers are beamed and observable under viewing angles as large as θ ≲40°. Finally, we provide preliminary estimates of the number of sGRB/KN events detected by future surveys carried out with present/future ground-based/space facilities, such as LSST, VST, ZTF, SKA, and THESEUS. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. |
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