Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...199l...9f&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 199, no. 1-2, June 1988, p. L9-L12. Research supported by the John Simon Gugge
Astronomy and Astrophysics
Astronomy
17
Neutron Stars, Satellite Observation, Stellar Flares, Stellar Structure, X Ray Astronomy, X Ray Binaries, Eddington Approximation, Exosat Satellite, Stellar Luminosity
Scientific paper
The authors propose a model for the multi-peaked structure observed in some X-ray bursts from 4U/MXB 1636-53. Due to the inflow of angular momentum associated with accreted gas from the disk onto a neutron star, differential rotation prevails in the burning shell. During thermonuclear flashes convection develops, driven by violent nuclear burning, and causes a redistribution of the angular momentum. This leads to shear instabilities, which mix the nuclear fuel left unburnt in the upper layer into the burning shell and sometimes rekindle the nuclear burning to trigger a multi-peaked X-ray burst. The model suggests that the intervals between the peaks are of the order of the risetime to the preceding peak.
Fujimoto Masayuki Y.
Lewin Walter H. G.
Paradijs Jan van
Sztajno Mirek
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