A new calculation on rotating protostar collapse

Details A new calculation on rotating protostar collapse A new calculation on rotating protostar collapse

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...239..968n&link_type=abstract

Astrophysical Journal, Part 1, vol. 239, Aug. 1, 1980, p. 968-981.

Astronomy and Astrophysics

Astrophysics

141

Astrophysics, Gravitational Collapse, Planetary Nebulae, Protostars, Advection, Angular Momentum, Isothermal Processes, Rotating Environments

Scientific paper

The isothermal collapse of a rotating axisymmetric gas cloud is calculated. The cloud is slowly rotating so that the collapse is deep, severely testing the angular momentum advection. Special care is taken to improve local conservation of angular momentum, which is monitored by a mass versus specific angular momentum spectrum. It is found that the collapse is a runaway yielding central disklike regions of increasing mass density and flatness. Although the numerical solution cannot become singular, it is shown that a possible final state for the cloud consistent with its mass versus specific angular momentum spectrum is an equilibrium thin disk which is singular in surface density and angular velocity at the rotation axis.

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