Coronae around Helium Stars and X-Ray Sources

Details Coronae around Helium Stars and X-Ray Sources Coronae around Helium Stars and X-Ray Sources

Jan 1969

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1969ap%26ss...3..160n&link_type=abstract

Astrophysics and Space Science, Volume 3, Issue 1, pp.160-162

Astronomy and Astrophysics

Astrophysics

9

Scientific paper

Calculations of the acoustic energy generation for helium-rich composition show that the maximum acoustic energy generation is located around 12000 K at logg=4 and 15000 K at logg=6. The author's suggestion in his last paper that a helium star ν Sgr may have a corona seems to be justified. X-ray from a corona around a helium star is strongest when the physical parameters of the star are logg˜6 andT e˜15000 K. But the total energy flux is too small to account for the observed X-ray sources.

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