Detection of nitric oxide in the dark cloud L134N

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169040· OSTI ID:6592160

Mcgonagle, D; Irvine, W M; Minh, Y C; Ziurys, L M ^[1]

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1. Massachusetts Univ., Amherst (USA) Arizona State Univ., Tempe (USA)

The first detection of interstellar nitric oxide (NO) in a cold dark cloud, L134N is reported. Nitric oxide was observed by means of its two 2 Pi 1/2, J = 3/2 - 1/2, rotational transitions at 150.2 and 150.5 GHz, which occur because of Lambda-doubling. The inferred column density for L134N is about 5 x 10 to the 14th/sq cm toward the SO peak in that cloud. This value corresponds to a fractional abundance relative to molecular hydrogen of about 6 x 10 to the -8th and is in good agreement with predictions of quiescent cloud ion-molecule chemistry. NO was not detected toward the dark cloud TMC-1 at an upper limit of 3 x 10 to the -8th or less. 26 refs.

• OSTI ID: 6592160
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 359; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARBON
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL COMPOSITION
CHEMISTRY
COSMIC GASES
COSMOCHEMISTRY
DETECTION
ELEMENTS
FLUIDS
GASES
HYDROGEN
INTERSTELLAR SPACE
IONS
MOLECULAR IONS
MOLECULES
NEBULAE
NITRIC OXIDE
NITROGEN COMPOUNDS
NITROGEN OXIDES
NONLUMINOUS MATTER
NONMETALS
OXIDES
OXYGEN COMPOUNDS
SPACE