High-resolution CO observations of NGC 7027

Journal Article · Wed May 15 04:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163176· OSTI ID:5146293

Masson, C R; Cheung, K W; Berge, G L; Claussen, M J; Heiligman, G M; Leighton, R B; Lo, K Y; Moffet, A T; Phillips, T G; Sargent, A I

We have made interferometer maps of CO(1--0) emission from NGC 7027. These maps show that the neutral gas has a flattened distribution, which is constraining the development of the ionized nebula contained within it. We have detected for the first time anomalous high-velocity CO emission. This emission originates in a layer of shocked, neutral gas surrounding the expanding H II region. From calculations of the shock parameters, we estimate a total mass for the gas cloud of 2d/sup 5/2/ M/sub sun/ and a mass loss rate of 1.1 x 10/sup -3/d/sup 3/2/ M/sub sun/ yr/sup -1/, where d is the distance to NGC 7027 in kpc.

• Research Organization: Owens Valley Radio Observatory, California Institute of Technology
• OSTI ID: 5146293
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 292:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COSMIC GASES
COSMIC RADIO SOURCES
EMISSION
FLUIDS
GASES
H2 REGIONS
INTERFEROMETRY
INTERSTELLAR GRAINS
MAPS
NEBULAE
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PLANETARY NEBULAE
SHOCK WAVES