Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars

Details Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars

2010-11-19

arxiv.org/abs/1011.4512v2

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

5 pages, 4 figures, accepted to ApJ Letters

Scientific paper

We evaluate the effect of a supersonic relative velocity between the baryons and dark matter on the thermal and density evolution of the first gas clouds at z < 50. Through a series of cosmological simulations, initialized at z=100 with a range of relative streaming velocities and minihalo formation redshifts, we find that the typical streaming velocities will have little effect on the gas evolution. Once the collapse begins, the subsequent evolution of the gas will be nearly indistinguishable from the case of no streaming, and star formation will still proceed in the same way, with no change in the characteristic Pop III stellar masses. Reionization is expected to be dominated by halo masses of > 10^8 M_sun, for which the expected effect of streaming is negligible.

Affiliated with

Also associated with

No associations

Rating

Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the 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 Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of Streaming Motion of Baryons Relative to Dark Matter on the Formation of the First Stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-21347