Published October 15, 1980
| Version v1
Journal article
Ammonia observations of DR 21, W51, NGC 1333, and other sources
- 1. E.O. Hulbert Center for Space Research, Naval Research Laboratory, Washington, DC
Description
The ammonia clouds in DR 21, W51, NGC 1333, NGC 2264, L134 N, and S140 have been mapped in several transitions. Ammonia has also been detected in several other sources we well. The DR 21 data reveal a long, narrow emission ridge and suggest a slight anomaly in the NH3(1,1) satellite emission, as was previously predicted. The validity of the single-temperature local thermodynamic equilibrium (LTE) model is discussed, and curves describing the effect of a gradient in excitation temperature are presented
Additional details
Publishing Information
- Journal Title
- Astrophys. J.
- Journal Volume
- 241
- Journal Issue
- 2
- Series
- Astrophys. J.
- Journal Page Range
- 655-675
- ISSN
- 0004-637X
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 12606309
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- AMMONIA; EMISSION; ENERGY SPECTRA; ENERGY-LEVEL TRANSITIONS; INTERSTELLAR GRAINS; LTE; NEBULAE; RADIOWAVE RADIATION
- Descriptors DEC
- ELECTROMAGNETIC RADIATION; EQUILIBRIUM; HYDRIDES; HYDROGEN COMPOUNDS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; PARTICLES; RADIATIONS; SPECTRA