PMO OpenIR  > 宇宙伽马暴、中子星及相关物理研究团组
High velocity neutron stars and gamma-ray bursts
Wei, DM ; Lu, T
Source PublicationAstrophysics and Space Science
AbstractThe observations of the BATSE instrument on the Compton Gamma-Ray Observatory show that the spatial distribution of gamma-ray burst sources is isotropic but radially non-uniform. As is well known, the spectral features, the time histories and the X-ray tails present in some gamma-ray bursts suggest that they may arise from galactic neutron stars. But, low velocity neutron stars born in the Galactic disk would concentrate toward the galactic plane and center, and could not fit the BATSE results. However, the high velocity neutron stars with velocity similar to 1000 km s(-1) may escape from the Galactic gravitational field and form a nearly isotropic distribution. Here we calculate the three statistical values of[V/V-max], [sin(2)b] and [cos theta] as functions of the intensities C-max/C-min and find that they could be fitted by the distribution of high velocity neutron stars under the assumption that the high velocity neutron stars should turn on as gamma-ray burst sources only after some time (perhaps after they have ceased to be radio pulsars). Our calculation shows that the statistical value of [cos theta] is more sensitive than [sin(2)b] to the angular distribution of high velocity neutron stars, i.e. the deviation of [cos theta] from 0 is more readily detected than the deviation of sin(2)b from 1/3, so we expect that with the increasing sensitivity of instrument and the more exact value of [cos theta], it is possible to determine whether this high velocity neutron star model is correct. Some results are discussed in the text.
Subject AreaAstronomy & Astrophysics
Document Type期刊论文
Recommended Citation
GB/T 7714
Wei, DM,Lu, T. High velocity neutron stars and gamma-ray bursts[J]. Astrophysics and Space Science,1996,235(2):289—296.
APA Wei, DM,&Lu, T.(1996).High velocity neutron stars and gamma-ray bursts.Astrophysics and Space Science,235(2),289—296.
MLA Wei, DM,et al."High velocity neutron stars and gamma-ray bursts".Astrophysics and Space Science 235.2(1996):289—296.
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