Implications of PSR J0737-3039B for the Galactic NS-NS binary merger rate
- 주제(키워드) gravitational waves , methods: statistical , binaries: close , pulsars: individual
- 주제(기타) Astronomy & Astrophysics
- 등재 SCIE, SCOPUS
- 발행기관 OXFORD UNIV PRESS
- 발행년도 2015
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000161907
- 본문언어 영어
- Published As http://dx.doi.org/10.1093/mnras/stu2729
초록/요약
The Double Pulsar (PSR J0737-3039) is the only neutron star-neutron star (NS-NS) binary in which both NSs have been detectable as radio pulsars. The Double Pulsar has been assumed to dominate the Galactic NS-NS binary merger rate R-g among all known systems, solely based on the properties of the first-born, recycled pulsar (PSR J0737-3039A, or A) with an assumption for the beaming correction factor of 6. In this work, we carefully correct observational biases for the second-born, non-recycled pulsar (PSR J0737-0737B, or B) and estimate the contribution from the Double Pulsar on R-g using constraints available from both A and B. Observational constraints from the B pulsar favour a small beaming correction factor for A (similar to 2), which is consistent with a bipolar model. Considering known NS-NS binaries with the best observational constraints, including both A and B, we obtain R-g = 21(-14)(+28) Myr(-1) at 95 per cent confidence from our reference model. We expect the detection rate of gravitational waves from NS-NS inspirals for the advanced ground-based gravitational-wave detectors is to be 8(-5)(+10) yr(-1) at 95 per cent confidence. Within several years, gravitational-wave detections relevant to NS-NS inspirals will provide us useful information to improve pulsar population models.
more