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Kutner and Thaddeus 1971

Kutner, M., and P. Thaddeus, 1971: 6-centimeter formaldehyde absorption and emission in the Orion Nebula. Astrophys. J., 168, L67-L71, doi:10.1086/180786.

Weak 6-cm H₂CO absorption has been found over much of the Orion Nebula, and is attributed to "anomalous" absorption of the universal microwave radiation by H₂CO behind the H II continuum source. In the Kleinmann-Low infrared nebula the line is self-reversed, with a core of about 0.10 K that is probably emission from the H₂CO observed there at 2 mm. These observations are interpreted as indicating that neutral-particle collisions suppress the pumping mechanism responsible for anomalous absorption.

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@article{ku00100w,
  author={Kutner, M. and Thaddeus, P.},
  title={6-centimeter formaldehyde absorption and emission in the Orion Nebula},
  year={1971},
  journal={Astrophysical Journal},
  volume={168},
  pages={L67--L71},
  doi={10.1086/180786},
}

TY  - JOUR
ID  - ku00100w
AU  - Kutner, M.
AU  - Thaddeus, P.
PY  - 1971
TI  - 6-centimeter formaldehyde absorption and emission in the Orion Nebula
JA  - Astrophys. J.
JO  - Astrophysical Journal
VL  - 168
SP  - L67
EP  - L71
DO  - 10.1086/180786
ER  -

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