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Record 82 of 5283
Nitric oxide in star-forming regions - Further evidence for interstellar N-O bonds
External Online Source: doi:10.1086/170072
Author and Affiliation:
Ziurys, L. M.(Arizona State University, Tempe)
Mcgonagle, D.(Arizona State Univ., Tempe, AZ, United States)
Minh, Y.(Arizona State Univ., Tempe, AZ, United States)
Irvine, W. M.(Five College Radio Astronomy Observatory, Amherst, MA, United States)
Abstract: Nitric oxide has been newly detected toward several star-forming clouds, including Orion-KL, Sgr B2(N), W33A, W51M, and DR21(OH) via its J = 3/2-1/2 transitions near 150 GHz, using the FCRAO 14 m telescope. Both lambda-doubling components of NO were observed toward all sources. Column densities derived for nitric oxide in these clouds are 10 to the 15th-10 to the 16th/sq cm, corresponding to fractional abundances of 0.5-1.0 x 10 to the -8th, relative to H2. Toward Orion-KL, the NO line profile suggests that the species arises primarily from hot, dense gas. Nitric oxide may arise from warm material toward the other clouds as well. Nitric oxide in star-forming regions could be synthesized by high-temperature reactions, although the observed abundances do not disagree with values predicted from low-temperature, ion-molecule chemistry by more than one order of magnitude.
Publication Date: Jun 01, 1991
Document ID:
19910053996
(Acquired Nov 28, 1995)
Accession Number: 91A38619
Subject Category: ASTROPHYSICS
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 373; 535-542
Publisher Information: United States
Contract/Grant/Task Num: NSF AST-88-15406; NSF AST-90-58467; NAGW-436
Financial Sponsor: NASA; United States
Organization Source: Arizona State Univ.; Tempe, AZ, United States
Arizona Univ.; Tucson, AZ, United States
Five-College Astronomy Dept.; Amherst, MA, United States
Description: 8p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ABUNDANCE; ASTRONOMICAL SPECTROSCOPY; COVALENT BONDS; INTERSTELLAR MATTER; NITRIC OXIDE; STAR FORMATION; GAS DENSITY; HYDROGEN; LINE SPECTRA; MOLECULAR IONS; ROTATIONAL SPECTRA; TELESCOPES
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 373, June 1, 1991, p. 535-542. Research supported by Millitech Corp., EG and G Princeton Applied Research, and Cochise Instruments.
Miscellaneous Notes: Research supported by Millitech Corp., EG and G Princeton Applied Research, and Cochise Instruments
Availability Source: Other Sources
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