High X-ray luminosity from dynamo stars |
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Authors: | G Belvedere D Molteni |
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Institution: | (1) Istituto di Astronomia dell'Università Osservatorio Astrofisico, Catania, Italy;(2) Istituto di Fisica dell'Università di Palermo, Italy |
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Abstract: | In the present work we intend to show that a stellar dynamo mechanism can produce high X-ray luminosities and also give account for modulation periods of the order thousand seconds or larger.We outline here that the model we propose does not require the presence of a very compact object in a binary system; indeed, we intend to show that faint late main sequence stars sufficiently fast rotating, can give rise by dynamo action to sufficiently high magnetic fields to give account for the strong X-ray emission of some galactic X-ray sources.We examine the possibility that also a fraction of those X-ray sources usually depicted as accreting binary systems may be interpreted as active stars supplied by the - dynamo mechanism. |
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