HCO emission from H II-molecular cloud interface regions

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

DOI:https://doi.org/10.1086/166337· OSTI ID:7023715

Schenewerk, M S; Jewell, P R; Snyder, L E; Hollis, J M; Ziurys, L M

A survey of well-known molecular clouds in the four strongest HCO N(k-,k+) = 1(01)-O(60) hyperfine transitions has been carried out to determine the prevalence of HCO and to study its chemistry. HCO emission was observed in seven molecular clouds. Three of these, NGC 2264, W49, and NGC 7538, were not previously known sources of HCO. In addition, NGC 2024 and Sgr B2 were mapped and shown to have extensive HCO emission. The survey results show the HCO abundance to be enhanced in H II-molecular cloud interface regions and support a correlation between C(+) and HCO emission. The strength of the HCO emission in NGC 2024 is interpreted in terms of this enhancement and the source structure and proximity to Earth. 44 references.

• Research Organization: National Radio Astronomy Observatory, Green Bank, WV (USA); National Radio Astronomy Observatory, Tucson, AZ (USA); Illinois Univ., Urbana (USA); NASA, Goddard Space Flight Center, Greenbelt, MD (USA); Five College Radio Astronomy Observatory, Amherst, MA (USA)
• OSTI ID: 7023715
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 328; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACYL RADICALS
ASTRONOMY
CHEMICAL COMPOSITION
CHEMISTRY
COSMIC GASES
COSMIC RADIO SOURCES
COSMOCHEMISTRY
FLUIDS
FORMYL RADICALS
GASES
H2 REGIONS
HYPERFINE STRUCTURE
INTERSTELLAR SPACE
MOLECULES
RADICALS
RADIOASTRONOMY
SPACE