Protostellar formation in rotating interstellar clouds. IV. Nonisothermal collapse

Journal Article · Wed Feb 15 04:00:00 EST 1984 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/161747· OSTI ID:6978333

Boss, A P

Radiative transfer in the Eddington approximation is included in a multidimensional, self-gravitational, hydrodynamical computer code. Details of the numerical solution and thermodynamic relations are given. Comparison calculations with previous spherically symmetrical models of protostellar collapse are used to validate the basic approach and the artifices which allow the explicit hydrodynamics code to follow the accretion of gas onto a quasi-equilibrium core. A series of axisymmetric models is used to investigate the importance of rotation in collapsing clouds, as the initial amount of angular momentum is lowered, with an emphasis on the possible formation of rings. Rings readily form even in the nonisothermal regime except for very low initial angular momenta; even these clouds may experience ring formation prior to reaching stellar densities. The models imply that other effects (such as gravitational torques or turbulent viscosity) may be necessary to avoid binary formation and thus result in a presolar nebula consistent with the assumptions of either Safronov or Cameron.

• Research Organization: Department of Terrestrial Magnetism, Carnegie Institution of Washington
• OSTI ID: 6978333
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 277:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR MOMENTUM
COSMIC GASES
FLUID MECHANICS
FLUIDS
GASES
GRAVITATIONAL COLLAPSE
HYDRODYNAMICS
MATHEMATICAL MODELS
MECHANICS
MOTION
PROTOSTARS
RADIATION TRANSPORT
ROTATION
STAR ACCRETION
STAR EVOLUTION
STAR MODELS