Radio Observations of the Interstellar OH Line at 1,667 Mc/s

@article{Dieter1964RadioOO,
  title={Radio Observations of the Interstellar OH Line at 1,667 Mc/s},
  author={Nannielou H. Dieter and Harold I. Ewen},
  journal={Nature},
  year={1964},
  volume={201},
  pages={279-281}
}
THE first experimental evidence for the presence of 18-cm absorption lines of the hydroxyl (OH) radical in the radio absorption spectrum of Cassiopeia A, as suggested by Lilley1, was obtained by Weinreb et al.2 based on observations made during the period October 15–29, 1963. The Radio Physics Laboratory, Commonwealth Scientific and Industrial Research Organization, in Sydney, Australia, has reported the successful measurement of OH absorption in the spectrum of Sagittarius (see preceding… 

Radio Observations of Interstellar Hydroxyl Radicals

The discovery of the radio frequency lines of OH gave the first positive evidence of the existence of OH in the interstellar medium, but many observations have revealed totally unexpected anomalies in the radio-spectral properties of interstellar OH.

OH Absorption Spectra in Sagittarius

WE have measured the 18-cm OH absorption spectrum of Sagittarius A over a range of 6.4 Mc/s using the 60-ft. radio telescope of Harvard College Observatory. This frequency range covers both the 1,667

The Detection of the OH and Other Molecular Lines in the Radio Spectrum of the Interstellar Medium

  • A. H. Barrett
  • Physics
    IEEE Transactions on Military Electronics
  • 1964
The detection of the 2П3/2, J= 3/2 Λ-doublet lines of O16H1 at 1665.36 Mc and 1667.40 Mc has provided radio astronomy with a second spectral line for investigation and has already given rise to a

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IN a recent communication Weinreb, Barrett, Meeks and Henry1 reported the discovery of the 18-cm lines of the hydroxyl (OH) radical in the radio absorption spectra of Cassiopeia A, and the result was

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