Wind anisotropy and stellar evolution

Details Wind anisotropy and stellar evolution Wind anisotropy and stellar evolution

2008-07-31

arxiv.org/abs/0807.5061v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures Proceeding of the IAU Symposium 255

Scientific paper

10.1017/S1743921308024824

Mass loss is a determinant factor which strongly affects the evolution and the fate of massive stars. At low metallicity, stars are supposed to rotate faster than at the solar one. This favors the existence of stars near the critical velocity. In this rotation regime, the deformation of the stellar surface becomes important, and wind anisotropy develops. Polar winds are expected to be dominant for fast rotating hot stars. These polar winds allow the star to lose large quantities of mass and still retain a high angular momentum, and they modifie the evolution of the surface velocity and the final angular momentum kept in the star's core. We show here how these winds affect the final stages of massive stars, according to our knowledge about Gamma Ray Bursts. Computation of theoretical Gamma Ray Bursts rate indicates that our models have too fast rotating cores, and that we need to include an additional effect to spin them down. Magnetic fields in stars act in this direction, and we show how they modify the evolution of massive star up to the final stages.

Affiliated with

Also associated with

No associations

Rating

Wind anisotropy and stellar evolution 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 Wind anisotropy and stellar evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wind anisotropy and stellar evolution will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-363800