High-Entropy Polar Regions Around the First Protostars

Details High-Entropy Polar Regions Around the First Protostars High-Entropy Polar Regions Around the First Protostars

2010-10-28

arxiv.org/abs/1010.6076v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

12 pages, 2 figures; accepted for publication in The Astrophysical Journal Letters

Scientific paper

We report on simulations of the formation of the first stars in the Universe, where we identify regions of hot atomic gas (fH2 < 10-6) at densities above 10-14 g/cc, heated to temperatures ranging between 3000 and 8000 K. Within this temperature range atomic hydrogen is unable to cool effectively. We describe the kinetic and thermal characteristics of these regions and investigate their origin. We find that these regions, while small in total mass fraction of the cloud, may be dynamically important over the accretion timescale for the central clump in the cloud, particularly as a chemical, rather than radiative, mechanism for clearing the polar regions of the accretion disk of material and terminating accretion along these directions. These inherently three-dimensional effects stress the need for multi-dimensional calculations of protostellar accretion for reliable predictions of the masses of the very first stars.

Affiliated with

Also associated with

No associations

Rating

High-Entropy Polar Regions Around the First Protostars 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 High-Entropy Polar Regions Around the First Protostars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-Entropy Polar Regions Around the First Protostars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-614300