Detection of shock-enhanced CH emission in bipolar outflows

Journal Article · Wed Jun 01 04:00:00 EDT 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/166436· OSTI ID:6766206

Sandell, G; Magnani, L; Lada, E A

High-velocity emission is found in the CH lines from the bipolar outflow sources AFGL 2591, AFGL 961, and NGC 2071IR. The wings of the line profiles are found to extend over more than 54 km/s in AFGL 2591 and 17 km/s in AFGL 961 (the blue wing only). The strong enhancement of CH abundance noted in the high-velocity gas is attributed to shock-induced chemical processes which are believed to produce CH efficiently in regions where the gas density is low. The relative line intensities between the satellite and the main line are shown to be close to unity for the blueshifted wings in AFGL 2591 and NGC 2071IR. It is suggested that the bulk of the high-velocity gas seen in CH originates in less dense gas than that seen in CO. 35 references.

• Research Organization: Joint Astronomy Center, Hilo, HI (USA); Arecibo Obseratory, PR (USA); E. O. Hulburt Center for Space Research, Washington, DC (USA); Texas Univ., Austin (USA)
• OSTI ID: 6766206
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 329; 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
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
ELECTROMAGNETIC RADIATION
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HYDROCARBONS
INFRARED RADIATION
INTERSTELLAR SPACE
MOLECULES
NEBULAE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
SHOCK WAVES
SPACE
SPECTROSCOPY
STELLAR ACTIVITY
STELLAR WINDS