The evolution of rotating stars. II - Calculations with time-dependent redistribution of angular momentum for 7- and 10-solar-mass stars

Details The evolution of rotating stars. II - Calculations with time-dependent redistribution of angular momentum for 7- and 10-solar-mass stars The evolution of rotating stars. II - Calculations with time-dependent redistribution of angular momentum for 7- and 10-solar-mass stars

Feb 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220..279e&link_type=abstract

Astrophysical Journal, Part 1, vol. 220, Feb. 15, 1978, p. 279-290.

Astronomy and Astrophysics

Astrophysics

174

Angular Momentum, Chemical Composition, Momentum Transfer, Stellar Evolution, Stellar Rotation, Time Dependence, Angular Velocity, Carbon, Convection, Eddington Approximation, Gravitational Collapse, Main Sequence Stars, Radial Velocity, Secular Variations, Stellar Models, Thermal Instability

Scientific paper

Calculations have been performed for the evolution of rotating stars with realistic time-dependent redistribution of angular momentum and chemical composition due to gas-dynamical instabilities. Convection and Eddington circulation are found to be the most important mechanisms for changing the angular-momentum distribution, while the dynamical shear and Solberg-Hoiland instabilities produce chemical mixing in regions which remain unmixed in nonrotating calculations. The calculations indicate that ignoring the finite time scales associated with angular-momentum redistribution is a poor and often misleading approximation. The primary results are: (1) evolved stellar cores develop nonaxisymmetric instabilities corresponding to the bifurcation of the Maclaurin sequence before they reach critical (Keplerian) rotational velocities; (2) for the 7-solar-mass star, the instability point is reached prior to carbon ignition, indicating that catastrophic carbon detonation may be avoided by rotating stars; and (3) the hydrodynamic events associated with violent stellar death will generally involve rapidly rotating, triaxial, or fissioning cores. In addition to radically altering the nature of these events, this indicates that stellar collapse may be a strong source of gravitational-wave radiation.

Affiliated with

Also associated with

No associations

Rating

The evolution of rotating stars. II - Calculations with time-dependent redistribution of angular momentum for 7- and 10-solar-mass stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The evolution of rotating stars. II - Calculations with time-dependent redistribution of angular momentum for 7- and 10-solar-mass stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The evolution of rotating stars. II - Calculations with time-dependent redistribution of angular momentum for 7- and 10-solar-mass stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1034399