Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-01-20
Astronomy and Astrophysics
Astrophysics
16 pages, 16 figures, accepted for publication in A&A
Scientific paper
10.1051/0004-6361:20078591
The development of parallel supercomputers allows today the detailed study of the collapse and the fragmentation of prestellar cores with increasingly accurate numerical simulations. Thanks to the advances in sub-millimeter observations, a wide range of observed initial conditions enable us to study the different modes of low-mass star formation. The challenge for the simulations is to reproduce the observational results. Two main numerical methods, namely AMR and SPH, are widely used to simulate the collapse and the fragmentation of prestellar cores. We compare thoroughly these two methods within their standard framework. We use the AMR code RAMSES and the SPH code DRAGON. Our physical model is as simple as possible and consists of an isothermal sphere rotating around the z-axis. We first study the conservation of angular momentum as a function of the resolution. Then, we explore a wide range of simulation parameters to study the fragmentation of prestellar cores. There seems to be a convergence between the two methods, provided resolution in each case is sufficient. Resolution criteria adapted to our physical cases, in terms of resolution per Jeans mass, for an accurate description of the formation of protostellar cores are deduced from the present study. This convergence is encouraging for future work in simulations of low-mass star formation, providing the aforementioned criteria are fulfilled. Higher resolution figures can be downloaded at http://www-dapnia.cea.fr/Projets/COAST/paper_amrvssph.pdf
Audit Edouard
Chabrier Gilles
Commercon Benoît
Hennebelle Patrick
Teyssier Romain
No associations
LandOfFree
Protostellar collapse: A comparison between SPH and AMR calculations 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 Protostellar collapse: A comparison between SPH and AMR calculations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protostellar collapse: A comparison between SPH and AMR calculations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-384673