GAMMA-RAY BURSTS AS THE DEATH THROES OF MASSIVE BINARY STARS

被引:1167
作者
NARAYAN, R
PACZYNSKI, B
PIRAN, T
机构
[1] PRINCETON UNIV OBSERV,PRINCETON,NJ 08544
[2] HEBREW UNIV JERUSALEM,RACAH INST PHYS,JERUSALEM,ISRAEL
关键词
ACCRETION; ACCRETION DISKS; BLACK HOLE PHYSICS; GAMMA RAYS; BURSTS; GRAVITATION; MAGNETIC FIELDS; STARS; NEUTRON;
D O I
10.1086/186493
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We propose that gamma-ray bursts are created in the mergers of double neutron star binaries and black hole neutron star binaries at cosmological distances. Two different processes provide the electromagnetic energy for the bursts: neutrino-antineutrino annihilation into electron-positron pairs during the merger, and magnetic flares generated by the Parker instability in a postmerger differentially rotating disk. In both cases, an optically thick fireball of size less than or similar to 100 km is initially created, which expands ultrarelativistically to large radii before radiating. The scenario is only qualitative at this time, but it eliminates many previous objections to the cosmological merger model. The strongest bursts should be found close to, but not at the centers of, galaxies at redshifts of order 0.1, and should be accompanied by bursts of gravitational radiation from the spiraling-in binary which could be detected by LIGO.
引用
收藏
页码:L83 / L86
页数:4
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