Evidence for shocked interstellar gas toward the Perseus OB2 association

Journal Article · Wed Oct 15 04:00:00 EDT 1980 · Astrophys. J., Lett. Ed.; (United States)

DOI:https://doi.org/10.1086/183371· OSTI ID:6635976

Federman, S R

Optical measurements of absorption lines of CH/sup +/ and CH toward zeta, omicron, and xi Persei reveal a shift in velocity between the two molecular species. The equivalent width of the CH/sup +/ varies directly with both the amount of shift seen and the line width. The present observations confirm predictions of the chemical model formulated by Elitzur and Watson. The model requires shocks for producing sufficient amounts of CH/sup +/; therefore, strong evidence for shocked interstellar gas is now available. Reexamination of the optical results for OH toward zeta and omicron Persei indicates that a substantial fraction of the OH also was formed in the high-temperature shocked gas.

• Research Organization: Astronomy Department and McDonald Observatory, University of Texas at Austin
• OSTI ID: 6635976
• Journal Information: Astrophys. J., Lett. Ed.; (United States), Journal Name: Astrophys. J., Lett. Ed.; (United States) Vol. 241:2; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
COSMIC GASES
FLUIDS
GASES
HYDROCARBONS
INTERSTELLAR GRAINS
INTERSTELLAR SPACE
LINE WIDTHS
MOLECULES
ORGANIC COMPOUNDS
PARTICLES
SHOCK WAVES
SPACE
SPECTRA
SPECTRAL SHIFT
STAR CLUSTERS