Rotation and luminosity variations in post-main sequence stars |
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| Authors: | Paul J Wiita |
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| Institution: | (1) Theoretical Astrophysics Group, Tata Institute of Fundamental Research, 400005 Bombay;(2) Present address: Department of Astronomy and Astrophysics, University of Pennsylvania, 19104 Philadelphia, USA |
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| Abstract: | Previous first-order analytic treatments of rotation acting upon stellar equilibria are extended to include later, post-Helium
burning, stages of stellar evolution. Strong differential rotation is capable of substantially increasing the photon luminosities
of post-main sequence stars, and thus accelerating their evolution. On the other hand, uniform rotation reduces the photon
flux for a wide range of stellar interior types and conditions. Similar conclusions are drawn regarding the effects of rotation
on the emission of neutrinos in pre-collapse phases of evolution. A brief discussion of the gravitational radiation emitted
during these phases is also given. |
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| Keywords: | rotating stars post-main sequence evolution neutrino emission gravitational radiation |
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