Published June 1989
| Version v1
Journal article
Masers and molecules near the unusual formaldehyde maser NGC 7538 IRS 1
Description
Interferometric observations of the emission from three hyperfine lines of the J = 1-0 transition of HCN have been analyzed in order to characterize the physical conditions in the molecular cloud associated with NGC 7538 IRS 1 and its 6-cm H2CO maser. It is suggested that the lack of HCN emission around IRS 1 and IRS 2 could be the result of the expansion of the H-II region. The presence of high-density clumps around IRS 1 can account for the different excitation requirements for the H2CO and OH masers. 34 refs
Additional details
Publishing Information
- Journal Title
- Astrophysical Journal
- Journal Volume
- 341
- Series
- Astrophys. J.
- Journal Page Range
- 832-838
- ISSN
- 0004-637X
- CODEN
- ASJOA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21004518
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- COSMIC GASES; EXPANSION; FORMALDEHYDE; HYDROCYANIC ACID; H2 REGIONS; INTERFEROMETERS; INTERSTELLAR SPACE; MASERS
- Descriptors DEC
- ALDEHYDES; AMPLIFIERS; COSMIC RADIO SOURCES; ELECTRONIC EQUIPMENT; EQUIPMENT; FLUIDS; GASES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; MEASURING INSTRUMENTS; MICROWAVE AMPLIFIERS; MICROWAVE EQUIPMENT; ORGANIC COMPOUNDS; SPACE