A Simplified Model for an Evolving Protoplanetary Nebula

Details A Simplified Model for an Evolving Protoplanetary Nebula A Simplified Model for an Evolving Protoplanetary Nebula

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...592.1193d&link_type=abstract

The Astrophysical Journal, Volume 592, Issue 2, pp. 1193-1200.

Astronomy and Astrophysics

Astronomy

7

Accretion, Accretion Disks, Methods: Analytical, Solar System: Formation

Scientific paper

The dynamic evolution of a protoplanetary nebula is investigated using analytical solutions of the surface density transport equations. Constant- and so-called β-viscosity turbulence models are compared with a functional analytical model and the well-known α-viscosity formulation. The model presented here is related to a number of simplified disk evolution models but is also associated with β-viscosity models based on hydrodynamic generation of turbulence. The β-viscosity model, heretofore used for steady state disks, is shown to be a useful approximation for disk evolution problems.

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