Publication Abstracts
Kutner 1972
Kutner, M.L., 1972: Interstellar Formaldehyde and Silicon Monoxide in Ultra-Dense Clouds. Ph.D. thesis. Columbia University.
The first part of this dissertation reports the discovery of the 140.8-GHz, 111-212 and 150.5-GHz 11-211 rotational transitions of ortho-formaldehyde and 146.6-GHz 101-202 transition of para-formaldehyde in the Orion Nebula. All lines were observed in emission. The 140.8GHz line was mapped over a region ∼3'×5' in the direction of the Kleinmann-Low IR nebula. It is argued that the excitation is due to collisions with neutral particles, whose density is calculated to be ∼2×105 cm-3, yielding a total mass of ∼200 M☉ for the Kleinmann-Low nebula which is argued to be the central condensation of this cloud. The 140.8-GHz line was also detected in the direction of Sgr A, W3 (OH), W51, DR21 (OH) and NGC 2024.
The detection of weak 6-cm H2CO absorption over much of the Orion Nebula is also reported. Because the line shows no correlation with the 6-cm continuum, it is attributed to "anomalous" absorption by H2CO behind the HII continuum source. In the direction of the Kleinmann-Low IR nebula the line appears self-reversed, with an emission core of about 0.1 K that is identified with the 2-mm H2CO emission in that direction. It is suggested that the 6-cm emission is a consequence of collissional quenching of the "anomalous" pumping mechanism.
The last section of this dissertation reports the detection of lime emission attributed to 130.246-GHz, J = 3→2 rotational transition of silicon monoxide (SiO) in the direction of the Sgr B2. The line was sought but not found in a number of other sources.
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BibTeX Citation
@phdthesis{ku06000k, author={Kutner, M. L.}, title={Interstellar Formaldehyde and Silicon Monoxide in Ultra-Dense Clouds}, year={1972}, school={Columbia University}, address={New York, N.Y.}, }
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RIS Citation
TY - THES ID - ku06000k AU - Kutner, M. L. PY - 1972 BT - Interstellar Formaldehyde and Silicon Monoxide in Ultra-Dense Clouds PB - Columbia University CY - New York, N.Y. ER -
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