VLA observations of the 6 centimeter and 2 centimeter lines of H sub 2 CO in the direction of W49
Journal Article
·
· Astrophysical Journal; (USA)
- Illinois Univ., Urbana (USA) National Radio Astronomy Observatory, Socorro, NM (USA)
Formaldehyde absorption at 6 cm and 2 cm toward the radio continuum source W49 has been mapped with the VLA, and Gaussian components have been fitted to the H{sub 2}CO profiles obtained in the direction of the embedded ultracompact H II regions. The densities of H{sub 2} and column densities of ortho-H{sub 2}CO are derived for the Gaussian range - 2 km/s and + 20 km/s. Large variations in optical depth are observed across the region. The structure and dynamics within the molecular core of W49 are determined. The main features of the results can be explained if the absorption occurs within the dense core of the molecular cloud and arises close to the embedded ultracompact H II regions UC H II. 57 refs.
- OSTI ID:
- 7135188
- Journal Information:
- Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 351; ISSN ASJOA; ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
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Journal Article
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Sat Nov 30 23:00:00 EST 1985
· Astrophys. J.; (United States)
·
OSTI ID:6103028
The compact molecular core toward G34. 3 + 0. 2 - VLA observations in the (2,2) and (3,3) lines of ammonia
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Mon Oct 01 00:00:00 EDT 1990
· Astrophysical Journal; (USA)
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OSTI ID:6231254
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Tue Mar 31 23:00:00 EST 1981
· Astrophys. J., Lett. Ed.; (United States)
·
OSTI ID:6457706
Related Subjects
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ALDEHYDES
COSMIC GASES
COSMIC RADIO SOURCES
DENSITY
DYNAMICS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
FLUIDS
FORMALDEHYDE
GASES
H2 REGIONS
HYDROGEN
INTERSTELLAR SPACE
LINE WIDTHS
MATHEMATICAL MODELS
MECHANICS
MICROWAVE RADIATION
MOLECULES
MORPHOLOGY
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SPACE
SPECTRA
SPECTROSCOPY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION SPECTRA
ALDEHYDES
COSMIC GASES
COSMIC RADIO SOURCES
DENSITY
DYNAMICS
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION SPECTRA
FLUIDS
FORMALDEHYDE
GASES
H2 REGIONS
HYDROGEN
INTERSTELLAR SPACE
LINE WIDTHS
MATHEMATICAL MODELS
MECHANICS
MICROWAVE RADIATION
MOLECULES
MORPHOLOGY
NONMETALS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SPACE
SPECTRA
SPECTROSCOPY