Protostellar collapse in a self-gravitating sheet

Details Protostellar collapse in a self-gravitating sheet Protostellar collapse in a self-gravitating sheet

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...430l..49h&link_type=abstract

The Astrophysical Journal, Part 2 - Letters, vol. 430, no. 1, p. L49-L52

Other

47

Accretion Disks, Gravitational Collapse, Protostars, Star Formation, Disks (Shapes), Early Stars, Flattening, Interstellar Gas, Rotating Disks

Scientific paper

We present preliminary calculations of protostellar cloud collapse starting from an isothermal, self-gravitating gaseous layer in hydrostatic equilibrium. This gravitationally unstable layer collapses into a flattened or toroidal density distribution, even in the absence of rotation or magnetic fields. We suggest that the flat infalling envelope recently observed in HL Tau by Hayashi et al.is the result of collapse from an initially nonspherical layer. We also speculate that the later evolution of such a flattened, collapsing envelope can produce a structure similar to the 'flared disk' invoked by Kenyon and Hartmann to explain the infrared excesses of many T Tauri stars.

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