Effects of a shock on the molecular composition of a diffuse interstellar cloud

Journal Article · Tue Mar 15 04:00:00 EST 1983 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160812· OSTI ID:5773968

Mitchell, G F; Deveau, T J

Postshock abundances have been followed for 10/sup 5/ years after the passage of a 10 km s/sup -1/ shock through a gas of initial density 100 cm/sup -3/. Abundance profiles and postshock column densities are presented for species which show marked changes in abundance, namely for C, C/sup +/, CO, CO/sub 2/, O/sub 2/, H/sub 2/CO, CH/sub 3/, CH/sub 4/, C/sub 2/H, C/sub 2/H/sub 2/, O, OH, H/sub 2/O, CH/sup +/, CH/sup +//sub 2/, CH/sup +//sub 3,/ CO/sup +/, HCO/sup +/, N/sub 2/, NO, CN, HCN, NH, NH/sub 2/, NH/sub 3/, HS, H/sub 2/S, SO, SO/sub 2/, CS, and H/sub 2/CS. Formation and destruction mechanisms for these species are discussed. We suggest that the enhancement of HCO/sup +/ in the shocked gas of IC 443 may be due to the presence of an appreciable abundance of C/sup +/ in the preshocked cloud.

• Research Organization: Department of Astronomy, Saint Mary's University, Halifax, Nova Scotia
• OSTI ID: 5773968
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 266:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CARBON COMPOUNDS
CHEMICAL COMPOSITION
CHEMISTRY
COSMIC GASES
COSMIC RADIO SOURCES
COSMOCHEMISTRY
FLUIDS
GASES
HYDROCARBONS
INTERSTELLAR GRAINS
NEBULAE
ORGANIC COMPOUNDS
PARTICLES
SHOCK WAVES
SULFUR COMPOUNDS
SUPERNOVA REMNANTS