Statistics – Computation
Scientific paper
Mar 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991mnras.249..248d&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 249, March 15, 1991, p. 248-261. Research supported by
Statistics
Computation
11
Interstellar Gas, Molecular Clouds, Protostars, Stellar Evolution, Astronomical Models, Computational Astrophysics, Perturbation Theory
Scientific paper
The tidally induced fragmentation of a rotating protostellar cloud has been modeled using a three-dimensional hydrodynamic code. The tidal pattern includes the effects of p = 3 nearby sources not aligned with the equatorial plane of the cloud, consistent with a realistic model for protostellar collapse. Clouds with alpha = 0.25 experience binary fragmentation through a sequence of intermediate forms: ring-deformed ring-bar, with increasing size of the tidal perturbation delta. Lower alpha (0.10 and 0.05) clouds undergo intermediate m = 2 bar fragmentation. For delta of 1.60 or less, the bar m = 2 mode is distorted by differential rotation into a ring-like structure which breaks up into a number of small-length fragments. For delta greater than 1.60, the bar mode resists rotational distortion inhibiting intermediate multiple fragmentation. Only for delta of 5.0 or greater, tidal forces may disrupt the collapse preventing fragmentation.
de Felice Fernando
Di Sigalotti Leonardo G.
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