Binary structure and accretion flow of the new intermediate polar H0253 + 193

Details Binary structure and accretion flow of the new intermediate polar H0253 + 193 Binary structure and accretion flow of the new intermediate polar H0253 + 193

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...405..307k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 405, no. 1, p. 307-311.

Astronomy and Astrophysics

Astrophysics

10

Eclipsing Binary Stars, Stellar Mass Accretion, X Ray Sources, White Dwarf Stars, X Ray Spectra

Scientific paper

This paper describes X-ray spectral variations of H0253 + 193 during its 6 hr binary orbit and 206 s pulsation. The orbital-phase-resolved X-ray spectra were well fitted by a thermal bremsstrahlung model with a temperature ranging from 16 to 33 keV and an iron emission line at about 6.7 keV. No systematic change of the temperature with orbital phase was found, but a clear orbital modulation of the hydrogen column density (NH) was discovered. H0253 + 193 shows total eclipses and double-peaked pulse profiles. During the ingress and egress of the eclipse, no significant spectral change was observed. The fractional pulse amplitude decreases as the X-ray energy increases. A possible geometry of the binary system and the structure of the accretion flow are discussed.

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