Variable Accretion Rates and Fluffy First Stars

Details Variable Accretion Rates and Fluffy First Stars Variable Accretion Rates and Fluffy First Stars

2011-12-18

arxiv.org/abs/1112.4157v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages, 5 figures, 2 tables Submitted to MNRAS, comments gratefully received

Scientific paper

We combine the output of hydrodynamical simulations of Population III star cluster formation with stellar evolution models, and calculate the evolution of protostars experiencing variable mass accretion rates due to interactions within a massive disk. We find that the primordial protostars are extended 'fluffy' objects for the bulk of their pre-main-sequence lifetimes. Accretion luminosity feedback from such objects is high, but as shown in previous work, has a minimal effect on the star cluster. The extended radii of the protostars, combined with the observation of close encounters in the simulations, suggests that mergers will occur in such systems. Furthermore, mass transfer between close protostellar binaries with extended radii could lead to massive tight binaries, which are a possible progenitor of gamma ray bursts.

Affiliated with

Also associated with

No associations

Rating

Variable Accretion Rates and Fluffy First 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 Variable Accretion Rates and Fluffy First Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable Accretion Rates and Fluffy First Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-25976