An Updated Galactic Double Neutron Star Merger Rate Based on Radio Pulsar Populations

Abstract

Following the procedure described in Pol et al., we update the Galactic double neutron star (DNS) merger rate by including the new, highly eccentric DNS system J0509+3801 (Lynch et al.). This leads to a new Galactic DNS merger rate of ${\mathcal{R}}_{\mathrm{MW}}=37_{-11}^{+24}$ Myr${}^{-1}$, where the errors represent 90% confidence intervals. The corresponding DNS merger detection rate for Advanced LIGO is $\mathcal{R}=1.9_{-0.6}^{+1.2}\times {\left(D_{\mathrm{r}}/100\mathrm{Mpc}\right)}^3\mathrm{y}{\mathrm{r}}^{-1},$ where $D_{\mathrm{r}}$ is the range distance. Using the LIGO O3 range distance of 130 Mpc (Abbott et al.), we predict that LIGO will detect anywhere between three and seven DNS mergers per year of observing at O3 sensitivity.

Published in Research Notes of the AAS. The data for figure 1 is available with the RNAAS publication

References in corpus (2)

• The Green Bank Northern Celestial Cap Pulsar Survey - I: Survey Description, Data Analysis, and Initial Results
• Host Galaxies Catalog Used in LIGO Searches for Compact Binary Coalescence Events

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