Gamma-ray bursts from high-velocity neutron stars
Article Abstract:
The isotropic but radially irregular distribution of gamma-ray bursts in space may be produced by a group of neutron stars with velocities greater than about 800 kilometers per second. For the neutron stars to be emitting the bursts two conditions must be satisfied: the high-velocity neutron stars should begin producing bursts only after a delay and low-velocity neutron stars should produce bursts infrequently. This model predicts that the brightest bursts will be spread through space anisotropically.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Genetic evidence supports demic diffusion of Han culture
Article Abstract:
Studies done to demonstrate that the pattern of the southward expansion of Han culture is consistent with the demic diffusion model, and that males played a larger role than females in this expansion by analyzing Y-chromosome and mitochondrial DNA variation in Han populations is reported. It was found that the massive movement of northern immigrants led to a change in genetic makeup in southern China, and resulted in the demographic expansion of Han people as well as their culture.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2004
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An origin in the local Universe for some short gamma-ray bursts
Article Abstract:
A correlation between the locations of short bursts and the positions of galaxies in the local Universe is reported. It is observed that 10 to 25 percent of short GRBs originate at low redshifts (z< 0.025)
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2005
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