Are gamma-ray bursters neutron stars accreting interstellar matter

Details Are gamma-ray bursters neutron stars accreting interstellar matter Are gamma-ray bursters neutron stars accreting interstellar matter

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..471b&link_type=abstract

(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie

Astronomy and Astrophysics

Astronomy

4

Gamma Ray Bursts, Interstellar Matter, Neutron Stars, Stellar Mass Accretion, Helium, Hydrogen Clouds, Interstellar Gas, Stellar Interiors, Thermonuclear Reactions

Scientific paper

A model for the approximately 150 gamma-ray burst events observed in recent years is presented. The existence of population I, old neutron stars with a density of one/100 cu pc was considered, with an accretion of interstellar matter at a rate defined by Bondi's law. The thermal evolution of the subsequent thick shells was calculated, with an eye to the possibility of thermonuclear runaway. Account was made of the energy exchanges between the accreted shell and the star interior, and a range of parameters was derived which would result in a runaway. Higher accretion rates were found to lead to a runaway when the shell reaches 50 cm in thickness and electron capture was occurring. Various changes in burning rates, changing temperatures, and accretion rates which would disrupt steady-state stages into a runaway condition and subsequent gamma-ray burst are discussed, noting that a significant role may also be played by the magnetic field.

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