Physics
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icrc....4..115b&link_type=abstract
Proceedings of the 26th International Cosmic Ray Conference. August 17-25, 1999. Salt Lake City, Utah, USA. Under the auspices o
Physics
Scientific paper
As a candidate of luminous super soft X-ray sources ( LSSS ) an accreting binary white dwarf ( WD ) of mass 1.3M have been considered . A red giant or a near main sequence star , more massive than the WD , when transfers high mass ( ~ 10-7 M / year ) towards WD , thermonuclear burning will be there on the accreting surface . The accreting matter containing small fraction of heavy nuclei - C, O, Ne, Mg - will capture proton at the high temperature condition leading to CNOF, NeNa, MgAlSi cyclic reactions. Energy generations due to these cyclic reactions have been studied to examine whether steady state nuclear burning can contribute to emit SS X- radiations. During the steady H-burning for 25 years CNOF , NeNa, MgAlSi cycle generates energy 5.46 * 109 , 1.12 * 109 , 2.88 * 108 ( erg g-1 s-1 ) respectively . Observed luminosities by Einstein , ROSAT, ASCA observatories are found to be explainable due to all these three cyclic operations , operating at the base of the envelope of the accretor . Absorptive and electron-scattering opacities at layers of the envelope and color temperature near the photosphere have been determined.
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