A search for CaO at mm-wavelengths in stars and molecular clouds

Details A search for CaO at mm-wavelengths in stars and molecular clouds A search for CaO at mm-wavelengths in stars and molecular clouds

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....75..268h&link_type=abstract

Astronomy and Astrophysics, vol. 75, no. 3, June 1979, p. 268-272. Research supported by the University of Wisconsin.

Astronomy and Astrophysics

Astrophysics

8

Calcium Oxides, Electron Transitions, Interstellar Matter, Millimeter Waves, Molecular Rotation, Stellar Atmospheres, Interstellar Extinction, Molecular Oscillations, Molecular Spectra, Stellar Envelopes

Scientific paper

Results are reported for an unsuccessful search for the J 4-3 rotational transitions of CaO in the ground and first excited vibrational states toward a selected group of 32 objects. The rest frequencies of these transitions are approximately 106, 192 MHz (J 4-3, v 0) and 105,398 MHz (J 4-3, v 1). Conservative upper limits are placed on the CaO column densities in the sources observed. It is concluded that CaO is not strongly mased in the J 4-3 transition in either the v 0 or the v 1 state.

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