Spherical accretion onto a protostellar core

Details Spherical accretion onto a protostellar core Spherical accretion onto a protostellar core

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stfm.work...83z&link_type=abstract

In its Star Formation Workshop p 83-90 (SEE N85-12809 03-88)

Computer Science

Accretion Disks, Protostars, Stellar Evolution, Stellar Mass Accretion, Gravitational Collapse, Magnetohydrostatics, Stellar Envelopes

Scientific paper

The results of an analytical calculation describing the temporal behavior of spherical accretion onto a hydrostatic protostellar core formed by nonhomologous collapse of a Jeans-unstable gaseous sphere are presented. It is found that in the late stages of accretion the core mass grows according to a hyperbolic tangent square law, in good agreement with numerical results. The results of a numerical calculation of spherical accretion onto a protostar embedded in a larger gas reservoir, in an attempt to relax the boundary condition that the total mass be constant, are reported. In this case the core mass grows linearly with time, in qualitative agreement with analytical results. Spherically-symmetric accretion onto a protostellar core is compared with spherically-symmetric accretion onto a point mass.

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