CH(+) in shocks, cloud-intercloud interfaces, and dense photon-dominated regions

Details CH(+) in shocks, cloud-intercloud interfaces, and dense photon-dominated regions CH(+) in shocks, cloud-intercloud interfaces, and dense photon-dominated regions

Apr 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992mnras.255..463d&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 255, April 1, 1992, p. 463-470. Research supported by S

Astronomy and Astrophysics

Astronomy

48

Early Stars, Hydrocarbons, Interstellar Gas, Molecular Clouds, Plasma Interactions, Shock Wave Propagation, Hydrogen Clouds, Interstellar Chemistry, Photons

Scientific paper

The paper investigates the production of interstellar CH(+) by the destruction, in shocks, of hydrogenated amorphous carbon in grains and the subsequent photoabsorption sequence. It is argued that much of the eroded carbon passes through CH(+). Maximum column densities (about 10 exp 12/sq cm) of CH(+) are obtained in the absence of H2. The relative abundances of CH(+), CH, OH, and various v = 0 rotationally excited levels of H2 in hot diffuse molecular gas in which the velocity distributions are all Maxwellian are calculated. It is argued that such gas exists in turbulent boundary layers at molecular-cloud-intercloud interfaces and has speeds lower than those associated with shocks. It is demonstrated that plausible conditions can be adopted which lead to relative abundances of several important species close to those observed. It is shown that CH(+) column densities of 10 exp 14/sq cm can be produced in photon-dominated regions only if the conditions in them are similar to those under which the hydroxyl maser regions surrounding young stars form.

Affiliated with

Also associated with

No associations

Rating

CH(+) in shocks, cloud-intercloud interfaces, and dense photon-dominated regions 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 CH(+) in shocks, cloud-intercloud interfaces, and dense photon-dominated regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CH(+) in shocks, cloud-intercloud interfaces, and dense photon-dominated regions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1738640