Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.203.1035r&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 203, June 1983, p. 1035-1039.
Astronomy and Astrophysics
Astronomy
22
Eclipsing Binary Stars, Stellar Luminosity, Stellar Rotation, X Ray Sources, Bolometers, Kepler Laws, Regression Coefficients, Stellar Temperature
Scientific paper
In a study of X-ray emission from RS CVn binaries, Walter & Bowyer have claimed that Lx/Lbol ∝ P-1.2 where Lx is the soft X-ray luminosity assumed to come from the active star, Lbol is the bolometric luminsoity of the active star and P is the rotational period which is nearly the same as the binary period of the active star. It is shown here that this correlation results mainly from a P1.2 dependence for Lbol while Lx is independent of period. The authors show from a sample of 341 eclipsing binaries containing only known F, G and K-type stars that the luminosity is proportional to P0.7 even for such a heterogeneous sample. The difference in the exponent for the two samples is most probably due to systematic differences in the way bolometric luminosity is computed.
Rengarajan T. N.
Verma Ram Prakash
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