A two-dimensional model for gamma-ray bursts

Details A two-dimensional model for gamma-ray bursts A two-dimensional model for gamma-ray bursts

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...258..733f&link_type=abstract

Astrophysical Journal, Part 1, vol. 258, July 15, 1982, p. 733-739.

Astronomy and Astrophysics

Astrophysics

34

Gamma Ray Bursts, Magnetohydrodynamic Flow, Neutron Stars, Stellar Mass Accretion, Thermonuclear Reactions, Two Dimensional Models, Detonation Waves, Helium, Hydrogen, Stellar Atmospheres, Stellar Models

Scientific paper

The spherically symmetric calculations of a thermonuclear explosion on a neutron star is extended to two dimensions. Assuming a simple dipolar field, accretion will be focused onto a small region at the polar cap. For a suitable accretion rate hydrogen burns stably by the beta-limited CNO cycle, forming a layer of helium; a thermonuclear runaway initiates at a point at the base of the helium layer. The detonation model is hydrodynamically calculated using a two-dimensional hydrodynamic code. The wave is found to propagate across the helium lake at 9000 km/s without dying out, igniting all the helium and liberating 2.4 x 10 to the 39th ergs. The rise time of the burst, determined by the time required to propagate the detonation across the helium layer, is about 50 microseconds.

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