Evidence for weak maser action in interstellar cyanodiacetylene

Journal Article · Mon Nov 01 04:00:00 EST 1976 · Astrophys. J., Lett.; (United States)

DOI:https://doi.org/10.1086/182285· OSTI ID:7330067

Broten, N W; MacLeod, J M; Oka, T; Avery, L W; Brooks, J W; McGee, R X; Newton, L M

The J=1..-->..0 and J=8..-->..7 rotational transitions of interstellar cyanodiacetylene have been observed in Sgr B2. These observations confirm the earlier detection of this heavy molecule, and provide further information on its excitation. The J=8..-->..7 line and the previously observed J=4..-->..3 line can be fitted to a thermal equilibrium model and give a total column density of 1.5 x 10/sup 14/ cm/sup -2/. The J=1..-->..0 transition is much stronger than expected from thermal equilibrium, and suggests maser action. (AIP)

• Research Organization: Herzberg Institute of Astrophysics, National Research Council of Canada, Ottawa, Canada
• OSTI ID: 7330067
• Journal Information: Astrophys. J., Lett.; (United States), Journal Name: Astrophys. J., Lett.; (United States) Vol. 209:3; ISSN AJLEA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
CHEMISTRY
COSMOCHEMISTRY
COSMOLOGICAL MODELS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
ENERGY-LEVEL TRANSITIONS
INTERSTELLAR SPACE
MASERS
MATHEMATICAL MODELS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RADIATIONS
RADIOWAVE RADIATION
SPACE
SPECTRA