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Dust in regions of massive star formationIt is suggested that protostars increase mass by accreting the surrounding gas and dust. Grains are destroyed as they near the central protostar creating a dust shell or cocoon. Radiation pressure acting on the grains can halt the inflow of material thereby limiting the amount of mass accumulated by the protostar. General constraints were considered on the initial dust-to-gas ratio and mass accretion rates that permit inflow. These results were constrained further by constructing a numerical model, including radiative deceleration on grains and grain destruction processes. Also the constraints on dust properties were investigated which allow the formation of massive stars. The obtained results seem to suggest that massive star formation requires rather extreme preconditioning of the grain and gas environment.
Document ID
19910005659
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wolfire, Mark G. (Chicago Univ. IL., United States)
Cassinelli, J. P. (Wisconsin Univ. Madison., United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1989
Publication Information
Publication: NASA, Ames Research Center, Interstellar Dust: Contributed Papers
Subject Category
Astrophysics
Accession Number
91N14972
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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