Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...315l..43m&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 315, April 1, 1987, p. L43-L47.
Astronomy and Astrophysics
Astrophysics
14
Accretion Disks, Neutron Stars, Stellar Coronas, Stellar Flares, Stellar Mass Accretion, X Ray Binaries, Stellar Models, X Ray Scattering
Scientific paper
The specific features of multipeaked X-ray bursts from 4U/MXB 1636-53, which are relatively weak and show no correlated photospheric radius expansion or contraction near the burst maximum, are explained using a model in which the observed luminosity is the sum of the direct component from the central source attenuated through an accretion disk corona and a component due to diffuse scattering by the corona. According to this model, the central peak in the triple-peaked burst results from an enhanced scattering emissivity of the direct component. At large inclination angles, the direct component may be unobservable; a burst detected via the scattered component only would be relatively short, weak, and would have similar rise and decay times. The direct and scattered components can be distinguished by X-ray polarimetry.
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