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Relations among stellar X-ray emission observed from Einstein, stellar rotation and bolometric luminosityThe correlation between observed stellar X-ray luminosities, bolometric luminosities, and projected rotational velocities for stars of various spectral types and luminosity classes are determined. Early type stars (O3 to A5) have X-ray luminosities independent of rotational velocities, and correlating with bolometric luminosities. Late type stars of spectral type G to M have luminosities well correlated to equatorial rotational velocities, and are independent of luminosity class. The dependence of late type stars is found to be equivalent to a relation between the X-ray surface flux and the stellar angular velocity. F stars are intermediate with X-ray luminosities higher than would be predicted on the basis of the early type star relation, although lower than expected from the late type velocity dependence. The location of RS CVn stars as a class is also discussed, and it is found that the heating of late type stellar coronas does not result from direct conversion of ratational energy.
Document ID
19810061750
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pallavicini, R.
(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Arcetri, Osservatorio Astrofisico Florence, Italy)
Golub, L.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Rosner, R.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Vaiana, G. S.
(Harvard-Smithsonian Center for Astrophysics, Cambridge, MA; Palermo, Osservatorio Astronomico Palermo, Italy)
Ayres, T.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Linsky, J. L.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
September 4, 2013
Publication Date
August 15, 1981
Publication Information
Publication: Astrophysical Journal
Subject Category
Astrophysics
Report/Patent Number
PB82-133869
Accession Number
81A46154
Funding Number(s)
CONTRACT_GRANT: NAG8-302
CONTRACT_GRANT: NAGW-112
Distribution Limits
Public
Copyright
Other

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