First detection of the ground state JK 10 going to 00 submillimeter transition of interstellar ammonia
Description
The JK 10 approaching 00 transition of ammonia at 572.5 GHz was detected in OMC-1 from NASA's Kuiper Airborne Observatory. The central velocity of the line (VLSR approximately 9 km/s) indicates that it originates in the molecular cloud material, not the hot core. The derived filling factor of approximately 0.09 in a 2' beam implies a source diameter of approximately 35 if it is a single clump. This clump area is much larger than that derived from observations of the sub 1 inversion transition. The larger optical depth in the 10 approaching 00 transition (75-350) can account for the increased source area and linewidth as compared with those seen in the 10 inversion transition
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS, PC A03/MF A01.
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Additional details
Publishing Information
- Imprint Pagination
- 18 p.
- Report number
- N--8325630
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 15007858
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- AMMONIA; COSMIC GASES; GROUND STATES; INFRARED SPECTRA; INTERSTELLAR SPACE; LINE WIDTHS
- Descriptors DEC
- ENERGY LEVELS; FLUIDS; GASES; HYDRIDES; HYDROGEN COMPOUNDS; NITROGEN COMPOUNDS; NITROGEN HYDRIDES; SPACE; SPECTRA
Optional Information
- Secondary number(s)
- NASA-TM--84359; A--9321.