The gamma-ray signature of the disruption of a neutron star by a black hole

Details The gamma-ray signature of the disruption of a neutron star by a black hole The gamma-ray signature of the disruption of a neutron star by a black hole

Jun 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...92..627h&link_type=abstract

The Astrophysical Journal Supplement Series, vol. 92, no. 2, p. 627-628

Astronomy and Astrophysics

Astronomy

3

Annihilation Reactions, Black Holes (Astronomy), Gamma Ray Astronomy, Gamma Ray Spectra, Neutron Stars, Spectral Emission, White Dwarf Stars, Antineutrinos, Collapse, Gamma Ray Observatory, Neutrinos, Stellar Winds

Scientific paper

The Burst and Transient Source Experiment (BATSE) experiment on the Compton Gamma Ray Observatory has shown that the distribution of gamma-ray sources is isotropic over the sky but nonuniform in radius, raising the possibility that these sources were placed at cosmological distances. The accretion-induced collapse of a white dwarf or the merging of two neutron stars or a neutron star and a black hole have been suggested as possible origins. We show here that in the two former cases all the energy is invested in the formation of a heavy wind. We also show that if the coalescence of a neutron star and a black hole of moderate mass produces a thick disk that emits neutrino antineutrino pairs, a wind from the disk forms and a funnel is left along the system axis, which cannot be reached by baryons because of angular momentum conservation. The energy deposited in the funnel by neutrino antineutrino annihilation produces a fire jet from which gamma rays can escape.

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