Time evolution of simple molecules during proto-star collapse

Details Time evolution of simple molecules during proto-star collapse Time evolution of simple molecules during proto-star collapse

2008-06-28

arxiv.org/abs/0806.4678v1

New Astron.13:457D,2008

Astronomy and Astrophysics

Astrophysics

20 pages, 18 figures in eps format

Scientific paper

10.1016/j.newast.2008.01.003

We study the formation and evolution of several molecules in a collapsing interstellar cloud using a reasonably large reaction network containing more then four hundred atomic and molecular species. We employ a time dependent, spherically symmetric, hydrodynamics code to follow the hydrodynamic and chemical evolution of the collapsing cloud. The flow is assumed to be self-gravitating. We use two models to study the hydrodynamic evolution: in the first model, we inject matter into an initially low density region and in the second model, we start with a constant density cloud and let it collapse due to self-gravity. We study the evolution of the central core for both the cases. We include the grain chemistry to compute the formation of molecular hydrogen and carried out the effect of gas and grain chemistry at each time step. We follow the collapse for more than $10^{14}$s (about 3 million years) and present the time evolution of the globally averaged abundances of various simple but biologically important molecules, such as glycine, alanine etc. We compare our results with those obtained from observations found that for lighter molecules the agreement is generally very good. For complex molecules we tend to under predict the abundances. This indicates that other pathways could be present to form these molecules or more accurate reaction rates were needed. Keywords: hydrodynamics; star formation; ISM; chemical evolution

Affiliated with

Also associated with

No associations

Rating

Time evolution of simple molecules during proto-star collapse 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 Time evolution of simple molecules during proto-star collapse, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time evolution of simple molecules during proto-star collapse will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-624762