2005/10/26 by J. A. DE FREITAS PACHECO, J. A. de Freitas Pacheco, T. Regimbau +5 · 5 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Gamma-ray bursts and supernovae #Pulsars and Gravitational Waves Research #astro-ph #gr-qc
paper · pdf · doi:10.1142/s0218271806007699
published as Int.J.Mod.Phys.D15:235-250,2006 · 15 pages, 3 figures accepted for publication in IJMPD
arxiv created 2005/10/26 · openalex publication_date 2006/02/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
The coalescence rate of two neutron stars (NS) is revisited. To estimate the number of bound NS-NS and the probability of their coalescence in a time scale τ, the galactic star formation history, directly derived from observations, and the evolution of massive stars are considered. The newly established galactic merging rate is (1.7±1.0) × 10 -5 yr -1 , while the local merging rate, including the contribution of elliptical galaxies, is about a factor of two higher, 3.4 × 10 -5 yr -1 . Using the present data basis on galaxy distribution in the local universe and the expected sensitivity of the first generation of laser beam interferometers, we estimate that one event should occur every 125 years for LIGO and one event each 148 years for VIRGO. The situation is considerably improved for advanced-LIGO, since we predict that 6 events per year should be detected whereas for a recently proposed VIRGO new configuration, the event rate might increase up to 3 events every two years.