2020ApJ...892L...8S

Query : 2020ApJ...892L...8S

2020ApJ...892L...8S - Astrophys. J., 892, L8-L8 (2020/March-3)

The branching ratio of LIGO binary black holes.

SAFARZADEH M.

Abstract (from CDS):

Formation of binary black holes (BBHs) detected by gravitational-wave observations could be broadly divided into two categories: those formed through field binary evolution and those assembled dynamically in dense stellar systems. The branching ratio of the BBHs refers to the contribution of each channel. The dynamical assembly channel would predict a symmetric distribution in the effective spins of the BBHs while field formation predicts BBHs to have positive effective spins. By modeling these two populations based on their effective spin distribution we show that in the 10 BBHs detected by LIGO/Virgo the contribution of the dynamically assembled BBHs is more than about 50% with 90% confidence. This result is based on the assumption that the field binaries are born with positive effective spins not restricted to have small values.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): LIGO - Black hole physics - High energy astrophysics

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GrW 170729 GWE ~ ~           ~ 127 0

Query : 2020ApJ...892L...8S

Basic data :
GrW 170729 -- Gravitational Wave Event
Other object types: otypes_help 		GWE (GrW)
ICRS coord. (ep=J2000) : 		No Coord.
Radial velocity / Redshift / cz : 		V(km/s) 111858 [59958] / z(~) 0.48 [0.20] / cz 143900 [59958]
   D 2020ApJ...890....8C

Identifiers (1) :
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GrW 170729

References (127 between 1850 and 2026) (Total 127)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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