An interpretation of X-ray spectra of type II bursts from the 'rapid burster' - Comptonization due to accretion flow

Details An interpretation of X-ray spectra of type II bursts from the 'rapid burster' - Comptonization due to accretion flow An interpretation of X-ray spectra of type II bursts from the 'rapid burster' - Comptonization due to accretion flow

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...355..577h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 355, June 1, 1990, p. 577-584.

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Astronomical Models, Neutron Stars, Stellar Mass Accretion, X Ray Spectra, Compton Effect, Computational Astrophysics, Exosat Satellite, Photons

Scientific paper

A new model is proposed for the spectrum of a type II burst from the 'rapid burster'. The spectrum of a type II burst has been considered to be well fitted with a blackbody spectrum with temperature T about 1.5 keV. Recent observations with Tenma and Exosat, however, have found an excess from the blackbody spectrum in the high-energy range (E greater than 10 keV). The high-energy component is approximated to be a power-law spectrum of f(E) proportional to E exp -4, where E and f(E) are the X-ray energy and observed counts per unit energy, respectively. The model explains this high-energy component gives a method to evaluate the velocity and the optical depth of the accretion flow from observations of the high-energy component. It is shown that the spectrum observed with Tenma can be fitted with the model.

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