Revisiting the Galactic Double Neutron Star merger and LIGO detection rates

被引：11

作者：

Grunthal, K. ^{[1
]}

Kramer, M. ^{[1
,2
]}

Desvignes, G. ^{[1
,3
]}

机构：

[1] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[2] Univ Manchester, Ctr Astrophys, Jodrell Bank, Manchester M13 9PL, Lancs, England

[3] Univ Paris, Sorbonne Univ, Univ PSL, Observ Paris,LESIA,CNRS, 5 Pl Jules Janssen, F-92195 Meudon, France

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 507卷 / 04期

基金：

欧洲研究理事会;

关键词：

stars: neutron; pulsars: general; neutron star mergers; DOUBLE-PULSAR SYSTEM; GRAVITATIONAL-RADIATION; SPIN PRECESSION; RADIO-EMISSION; BINARY; GEOMETRY; YOUNG; BEAM; POPULATION; EVOLUTION;

D O I：

10.1093/mnras/stab2198

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We revisit the merger rate for Galactic double neutron star (DNS) systems in light of recent observational insight into the longitudinal and latitudinal beam shape of the relativistic DNS PSR J1906 + 0746. Due to its young age and its relativistic orbit, the pulsar contributes significantly to the estimate of the joint Galactic merger rate. We follow previous analyses by modelling the underlying pulsar population of nine merging DNS systems and study the impact and resulting uncertainties when replacing simplifying assumptions made in the past with actual knowledge of the beam shape, its extent, and the viewing geometry. We find that the individual contribution of PSR J1906 + 0746 increases to although the values are still consistent with previous estimates, given the uncertainties. We also compute contributions to the merger rates from the other DNS systems by applying a generic beam shape derived from that of PSR J1906 + 0746, evaluating the impact of previous assumptions. We derive a joint Galactic DNS merger rate of RMwgen = 32(-9)(+19), leading to a LIGO detection rate of (90 percent conf. limit), considering the upcoming O3 sensitivity of LIGO. As these values are in good agreement with previous estimates, we conclude that the method of estimating the DNS merger and LIGO detection rates via the study of the radio pulsar DNS population is less prone to systematic uncertainties than previously thought.

引用

页码：5658 / 5670

页数：13

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