Luminosity versus Rotation in a Supermassive Star

Details Luminosity versus Rotation in a Supermassive Star Luminosity versus Rotation in a Supermassive Star

1999-09-14

arxiv.org/abs/astro-ph/9909236v1

Astrophys.J. 526 (1999) 937

Astronomy and Astrophysics

Astrophysics

5 pages, 2 figures, uses emulateapj.sty; to appear in ApJ

Scientific paper

10.1086/308007

We determine the effect of rotation on the luminosity of supermassive stars. We apply the Roche model to calculate analytically the emitted radiation from a uniformly rotating, radiation-dominated supermassive configuration. We find that the luminosity at maximum rotation, when mass at the equator orbits at the Kepler period, is reduced by ~36% below the usual Eddington luminosity from the corresponding nonrotating star. A supermassive star is believed to evolve in a quasistationary manner along such a maximally rotating ``mass-shedding'' sequence before reaching the point of dynamical instability; hence this reduced luminosity determines the evolutionary timescale. Our result therefore implies that the lifetime of a supermassive star prior to dynamical collapse is ~56% longer than the value typically estimated by employing the usual Eddington luminosity.

Affiliated with

Also associated with

No associations

Rating

Luminosity versus Rotation in a Supermassive Star 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 Luminosity versus Rotation in a Supermassive Star, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Luminosity versus Rotation in a Supermassive Star will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-655586