Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...214..152s&link_type=abstract
Astrophysical Journal, Part 1, vol. 214, May 15, 1977, p. 152-160.
Astronomy and Astrophysics
Astrophysics
125
Gravitational Collapse, Hydrogen Clouds, Star Formation, Cosmic Dust, Magnetic Fields, Optical Thickness, Protostars, Rotating Bodies
Scientific paper
Opacity-limited fragmentation of gravitationally collapsing gas clouds is reexamined with inclusion of realistic dust-grain opacities and cooling rates. A minimum fragment size of approximately 0.01 solar mass is found in spherical collapse, but may be the same or larger for spheroidal collapse. A simple analytic expression is given for the characteristic protostellar mass above which further fragmentation can occur during the early opaque phases of dynamical protostellar collapse. The effects of rotation, fragment collisions, and magnetic fields are also discussed.
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