A collapse model of the turbulent presolar nebula

Details A collapse model of the turbulent presolar nebula A collapse model of the turbulent presolar nebula

Dec 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...188...55t&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 188, no. 1, Dec. 1987, p. 55-73.

Astronomy and Astrophysics

Astrophysics

53

Gravitational Collapse, Nebulae, Star Formation, Stellar Models, Angular Distribution, Boundary Value Problems, Density Distribution, Magnetohydrodynamic Flow, Temperature Distribution

Scientific paper

The formation of presolar nebula-like objects is investigated using a sequence of axially-symmetric collapse models. Under the conditions of the adopted parameters, the cloud is highly Jeans-unstable. The calculations show the formation of a stable stellar core (the precursor of the early sun in a solar nebula) which takes shape after the completion of the second collapse and a subsequent violent redistribution of angular momentum. Results indicate that disruptive core expansions triggered both by recombination processes and the reformation of hydrogen molecules cannot develop, and that the core instead undergoes, at most, a series of quasi-adiabatic oscillations.

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