Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...69...70b&link_type=abstract
Icarus (ISSN 0019-1035), vol. 69, Jan. 1987, p. 70-82. SERC-supported research.
Astronomy and Astrophysics
Astronomy
13
Astronomical Models, Comets, Protostars, Stellar Evolution, Comet Nuclei, Particle Collisions, Shock Waves, Stellar Envelopes, Stellar Winds, Velocity Distribution, Comets, Formation, Collisions, Grains, Size, Dust, Theoretical Studies, Calculations, Dynamics, Models, Origin, Evolution, Time Scale
Scientific paper
An analytical model is developed for the formation of comets from grain collisions in cold, dense shells of material swept by a protostellar wind. The wind moves into the circumstellar envelope and generates a two-shock flow pattern, forming a rapidly cooling thin, dense outwardly moving shell which within 1000 yr attains a density of 10-100 trillion/cu m in motions sufficiently turbulent as to produce many collisions. The growth rate of the subsequently formed grains is estimated. It is shown that a velocity dispersion under 0.01 m/sec for large grains would lead to the formation of kilometer sized bodies, i.e., prospective comet nuclei. The process would be ubiquitous around young stars.
No associations
LandOfFree
The formation of comets in wind-driven shells around protostars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The formation of comets in wind-driven shells around protostars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The formation of comets in wind-driven shells around protostars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1623825