The detection of interstellar /O-17/H

Details The detection of interstellar /O-17/H The detection of interstellar /O-17/H

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.176p..57g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 176, Aug. 1976, p. 57P-60P.

Astronomy and Astrophysics

Astronomy

6

Electromagnetic Absorption, Hydroxyl Emission, Hyperfine Structure, Interstellar Extinction, Line Spectra, Abundance, Galactic Nuclei, Radio Spectra, Ultrahigh Frequencies

Scientific paper

The two most intense lines of the 18-cm spectrum of (O-17)H have been detected in absorption against Sgr A. Rest frequencies of about 1626.17 and 1624.43 MHz have been derived. The number ratio (O-18)H/(O-17)H of approximately 4.2 is less than the terrestrial value of 5.5. It is concluded that the O-17/O-16 abundance ratio near the galactic center is greater than the terrestrial value.

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