Can we constrain the aftermath of binary neutron star mergers with short gamma-ray bursts?
arXiv:2009.10488 · doi:10.1093/mnrasl/slaa169
Abstract
The joint observation of GW170817 and GRB170817A proved that binary neutron star (BNS) mergers are progenitors of short Gamma-ray Bursts (SGRB): this established a direct link between the still unsettled SGRB central engine and the outcome of BNS mergers, whose nature depends on the equation of state (EOS) and on the masses of the NSs. We propose a novel method to probe the central engine of SGRBs based on this link. We produce an extended catalog of BNS mergers by combining recent theoretically predicted BNS merger rate as a function of redshift and the NS mass distribution inferred from measurements of Galactic BNSs. We use this catalog to predict the number of BNS systems ending as magnetars (stable or Supramassive NS) or BHs (formed promptly or after the collapse of a hypermassive NS) for different EOSs, and we compare these outcomes with the observed rate of SGRBs. Despite the uncertainties mainly related to the poor knowledge of the SGRB jet structure, we find that for most EOSs the rate of magnetars produced after BNS mergers is sufficient to power all the SGRBs, while scenarios with only BHs as possible central engine seems to be disfavoured.
Accepted for publication in MNRAS Letters
References in corpus (25)
- GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
- Gravitational Waves and Gamma-rays from a Binary Neutron Star Merger: GW170817 and GRB 170817A
- GW190814: Gravitational Waves from the Coalescence of a 23 M Black Hole with a 2.6 M Compact Object
- An Ordinary Short Gamma-Ray Burst with Extraordinary Implications: Fermi-GBM Detection of GRB 170817A
- INTEGRAL Detection of the First Prompt Gamma-Ray Signal Coincident with the Gravitational Wave Event GW170817
- Constraining the Maximum Mass of Neutron Stars From Multi-Messenger Observations of GW170817
- GW170817: Joint Constraint on the Neutron Star Equation of State from Multimessenger Observations
- Modeling GW170817 based on numerical relativity and its implications
- Short Duration Gamma-Ray Bursts with Extended Emission from Proto-Magnetar Spin-Down
- Accurate evolutions of inspiralling neutron-star binaries: prompt and delayed collapse to black hole
- Merger of binary neutron stars to a black hole: Disk mass, short gamma-ray bursts, and quasinormal mode ringing
- Binary Neutron Star Mergers: Dependence on the Nuclear Equation of State
- The rate, luminosity function and time delay of non-Collapsar short GRBs
- Search for post-merger gravitational waves from the remnant of the binary neutron star merger GW170817
- GRB afterglow plateaus and Gravitational Waves: multi-messenger signature of a millisecond magnetar?
- Neutron star-black hole mergers with a nuclear equation of state and neutrino cooling: Dependence in the binary parameters
- On the Rate of Neutron Star Binary Mergers from Globular Clusters
- The properties of merging black holes and neutron stars across cosmic time
- A complete sample of bright Swift short Gamma-Ray Bursts
- Different progenitors of short hard gamma-ray bursts
- Short GRBs at the dawn of the gravitational wave era
- Structure of Gamma-Ray Burst jets: intrinsic versus apparent properties
- Dynamical ejecta from precessing neutron star-black hole mergers with a hot, nuclear-theory based equation of state
- Short Gamma Ray Bursts: a bimodal origin?
- Whispers from the edge of physics