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The Simulation of Orbit Decay of Double Neutron Star System PSR J1906+0746 by the Gravitational Wave Radiation |
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| Authors: | Liu Peng Zhang Cheng-Min Li Di Yang Yi-Yan Zhang Jie Zhang Jian-Wei |
| Institution: | 1.National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China ;2.University of Chinese Academy of Sciences, Beijing, China ;3.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Beijing, China ;4.Astronomy Department, Beijing Normal University, Beijing, China ;5.School of Physics and Electronic Sciences, Guizhou Education University, Guiyang, China ;6.School of Physics and Electronic Engineering, Qilu Normal University, Jinan, China ; |
| Abstract: | With the discovery of the double neutron star (DNS) merger event GW170817 by LIGO, DNS systems have become one of the important candidates for gravitational wave (GW) observation. There are 19 DNS systems that have been discovered, and PSR J1906+0746 is the youngest DNS system with the age of about 0.1 Myrs. We simulate its orbital decay over its entire life by the GW radiation from the initial stage to the coalescence. For the DNS PSR J1906+0746, we obtain its initial orbital period of 3.99 hrs (3.98 hrs at present) with the nearly circular orbit, and the merger age of 3.18 × 108 yr. At the last minute of coalescence, corresponding to the orbital radius change from 335 to 30 km, we present the GW frequency to be 30 and 1122 Hz, respectively. As a comparison, with the GW frequency from 45 to 450 Hz, the orbital radii of the source GW170817 correspond to 163 and 57 km, respectively. |
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