2022A&A...666A.174S


Query : 2022A&A...666A.174S

2022A&A...666A.174S - Astronomy and Astrophysics, volume 666A, 174 (2022/10-1)

Constraints on the merging binary neutron star mass distribution and equation of state based on the incidence of jets in the population.

SALAFIA O.S., COLOMBO A., GABRIELLI F. and MANDEL I.

Abstract (from CDS):

A relativistic jet has been produced in the single well-localised binary neutron star (BNS) merger detected to date in gravitational waves (GWs), and the local rates of BNS mergers and short gamma-ray bursts are of the same order of magnitude. This suggests that jet formation is not a rare outcome for BNS mergers, and we show that this intuition can be turned into a quantitative constraint: at least about one-third of GW-detected BNS mergers and at least about one-fifth of all BNS mergers should produce a successful jet (90% credible level). Whether a jet is launched depends on the properties of the merger remnant and of the surrounding accretion disc, which in turn are a function of the progenitor binary masses and equation of state (EoS). The incidence of jets in the population therefore carries information about the binary component mass distribution and EoS. Under the assumption that a jet can only be produced by a black hole remnant surrounded by a non-negligible accretion disc, we show how the jet incidence can be used to place a joint constraint on the space of BNS component mass distributions and EoS. The result points to a broad mass distribution, with particularly strong support for masses in the 1.3 - 1.6 M range. The constraints on the EoS are shallow, but we show how they will tighten as the knowledge on the jet incidence improves. We also discuss how to extend the method to include future BNS mergers, with possibly uncertain jet associations.

Abstract Copyright: © O. S. Salafia et al. 2022

Journal keyword(s): gravitational waves - gamma-ray burst: general - stars: neutron - pulsars: general - stars: luminosity function, mass function - relativistic processes

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 PSR J0740+6620 Psr 07 40 45.799 +66 20 33.60           ~ 281 0
2 GrW 170817 GWE 13 09 48.0850 -23 22 53.343           ~ 2027 0
3 PSR J1906+0749 Psr 19 06 48.67 +07 46 28.6           ~ 143 1
4 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1827 2
5 GRB 190425 GWE ~ ~           ~ 328 0

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