Gravitational collapse and fragmentation of isothermal, nonrotating, cylindrical clouds
Abstract
Hydrodynamical calculations for nonrotating isothermal clouds which are initially cylindrical rather than spherical are performed in order to determine the effects of the initial configuration on the results. A number of different behaviors are found, depending on the lengthtodiameter ratio of the cloud and its initial Jeans number. The results of calculations for finite elongated clouds cannot be extended to an asymptotic limit allowing comparison with analytical work on infinite cylinders. The two subcondensations that form in the case of elongated cylindrical clouds may be identified as an 'end effect'. An analysis of the results shows that the effects of boundary conditions on the results of such calculations decrease as Jeans number increases, while the effects of initial density distribution increase with Jeans number.
 Publication:

Astronomy and Astrophysics
 Pub Date:
 March 1983
 Bibcode:
 1983A&A...119..109B
 Keywords:

 Cylindrical Plasmas;
 Gravitational Collapse;
 Jeans Theory;
 Molecular Clouds;
 Stellar Evolution;
 Density Distribution;
 Flow Stability;
 Fragmentation;
 Hydrodynamics;
 Isothermal Flow;
 Astrophysics