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Theoretical considerations of shock wave behaviorInterstellar shock waves have a significant influence on the structure and dynamics of interstellar matter and probably trigger star formation in suitably dense regions. The overall structure of regions near shock waves is reviewed; in addition, the main observational effects of shocks on interstellar molecules are discussed including: (1) acceleration to velocities in the 1 km/s to 100 km/s range relative to the ambient gas, (2) excitation of infrared lines in the heated postshock gas, and (3) production of high abundances of certain molecular species such as H, OH, H2O, CH(+), OCS, and SiO through high temperature chemical reactions in the postshock gas at temperatures above 1000 K. The molecular region around the BN infrared source in Orion and the high velocity molecules in IC443 are discussed as possible examples of shocked molecular gas.
Document ID
19810043326
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hollenbach, D.
(NASA Ames Research Center Moffett Field, Calif., United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Astrophysics
Meeting Information
Meeting: Symposium on Interstellar molecules
Location: Mont Tremblant, Quebec
Country: Canada
Start Date: August 6, 1979
End Date: August 10, 1979
Accession Number
81A27730
Funding Number(s)
CONTRACT_GRANT: NSF AST-77-23069
Distribution Limits
Public
Copyright
Other

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