Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...218..659r&link_type=abstract
Astrophysical Journal, Part 1, vol. 218, Dec. 15, 1977, p. 659-667. Research supported by the Alfred P. Sloan Foundation
Astronomy and Astrophysics
Astronomy
12
Carbon, Interstellar Masers, Microwave Emission, Radiative Recombination, Radio Sources (Astronomy), Emission Spectra, Interstellar Chemistry, Line Spectra, Molecular Spectra, Recombination Reactions
Scientific paper
C76-alpha emission (at 14.697 GHz) toward NGC 2024 and IC 1795 has been mapped. The observations indicate that at this frequency spontaneous emission is the dominant line-formation mechanism in these regions. A comparison of the observed carbon recombination-line spectra with spectra calculated for models of the two emission regions suggests that there are two different carbon-line-emitting clouds in NGC 2024 and possibly in IC 1795. A search was also carried out for carbon recombination-line emission toward the dense molecular sources in NGC 2023, NGC 2264, W3(OH), K3-50, and DR 21(OH).
Palmer Patrick
Rickard Lee J.
Turner Barry E.
Zuckerman Ben
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