Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981ssrv...30..181b&link_type=abstract
(European Space Agency, ESLAB Symposium on X-ray Astronomy, 15th, Amsterdam, Netherlands, June 22-26, 1981.) Space Science Revie
Astronomy and Astrophysics
Astronomy
Binary Stars, Dynamo Theory, Main Sequence Stars, Stellar Luminosity, Stellar Models, X Ray Sources, Galaxies, Neutron Stars, Stellar Envelopes, Stellar Magnetic Fields, Stellar Rotation
Scientific paper
An attempt is made to show that a stellar dynamo mechanism can produce high X-ray luminosities and also account for modulation periods of the order of a thousand seconds or more. The proposed model does not require the presence of a very compact object in a binary system; indeed, it is shown that sufficiently fast-rotating faint late main-sequence stars can give rise by dynamo action to sufficiently high magnetic fields, accounting for the strong X-ray emission of some galactic X-ray sources. Attention is given to the possibility that a fraction of those X-ray sources which are usually depicted as accreting binary systems may be interpreted as active stars supplied by the alpha-omega dynamo mechanism.
Belvedere Gaetano
Molteni Diego
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