Journal Article

On magnetoacoustic-gravity-inertial (MAGI) waves – II. Application to magnetic and rotating stars

L. M. B. C. Campos

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 410, issue 2, pages 735-761
Published in print January 2011 | ISSN: 0035-8711
Published online December 2010 | e-ISSN: 1365-2966 | DOI: https://dx.doi.org/10.1111/j.1365-2966.2010.17552.x
On magnetoacoustic-gravity-inertial (MAGI) waves – II. Application to magnetic and rotating stars

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The expression for the energy flux of magnetoacoustic-gravity-inertial (MAGI) waves derived in the Part I of the present paper is applied to the luminosity of stars, leading to more than 60 relations between observable stellar quantities. Three of these relations are compared with empirical data, viz. concerning stellar luminosity or brightness compared with (i) magnetic field strength for strong magnetic stars, (ii) rotation period for fast rotating stars and (iii) mass and temperature for stars in general. Since out of more than 60 relations only two (three) are independent for magnetic non-rotating (rotating) stars, the comparisons above should be a sufficient verification of the whole. More than 60 relations specify 15 (20) quantities for non-rotating (rotating) magnetic stars from just two (three) observed values; this allows further cross-checking of the theory if additional empirical data are available. The theoretical data beyond the available empirical data could be of use in interpreting observations, leading for example to alternative forms of the H–R diagram, with different abscissas and ordinates. The main aim of the present paper is thus to provide relations between stellar data which can be compared with observation, and thus substantiate or reject the basic underlying assumption, which is supported by the tests (i) to (iii) made so far.

Keywords: waves; stars: atmospheres; stars: magnetic field; stars: rotation

Journal Article.  13721 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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