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The evolution of rotating stars. I - Method and exploratory calculations for a 7-solar-mass starA method is developed which allows the evolution of rotating stars to be studied well beyond the main-sequence stage. Four different cases of redistribution of angular momentum in an evolving star are considered. Evolutionary sequences for a 7-solar-mass star, rotating according to these different cases, were computed from the zero-age main-sequence to the double-shell-source stage. Each sequence was begun with a (typical) equatorial rotational velocity of 210 km/s. On the main sequence, the effects of rotation are of minor importance. However, as the core contracts during later stages, important effects arise in all physically plausible cases. The outer regions of the cores approach critical velocities and develop unstable angular-velocity distributions. The effects of these instabilities should significantly alter the subsequent evolution.
Document ID
19770032743
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Endal, A. S.
(NASA Goddard Space Flight Center Laboratory for Optical Astronomy, Greenbelt, Md., United States)
Sofia, S.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 9, 2013
Publication Date
November 15, 1976
Publication Information
Publication: Astrophysical Journal
Volume: 210
Subject Category
Astrophysics
Accession Number
77A15595
Distribution Limits
Public
Copyright
Other

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