Dust Opacity and the Contraction of Protoplanetary Atmospheres

Details Dust Opacity and the Contraction of Protoplanetary Atmospheres Dust Opacity and the Contraction of Protoplanetary Atmospheres

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004rmxac..22..104p&link_type=abstract

Gravitational Collapse: From Massive Stars to Planets. / First Astrophysics meeting of the Observatorio Astronomico Nacional. /

Astronomy and Astrophysics

Astrophysics

2

Ism: Dust, Extinction, Stars: Planetary Systems: Formation

Scientific paper

I present a model for the computation of the opacity of grains in a protoplanetary atmosphere. The grain size distribution at different levels in the atmosphere is calculated using the microphysics of grain growth via collisions and destruction via vaporization at high temperatures. The Rosseland mean opacity of the resulting distribution can then be computed. The resulting grain opacities are much smaller than those computed assuming a size distribution similar to that of interstellar grains, and is similar to the low opacities used in the models of Hubickyj et al. (2000, 2002).

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