Interstellar C2 molecules toward Zeta Persei

Details Interstellar C2 molecules toward Zeta Persei Interstellar C2 molecules toward Zeta Persei

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232l.175h&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 232, Sept. 15, 1979, p. L175-L177. NASA-supported research.

Astronomy and Astrophysics

Astrophysics

26

Carbon, Interstellar Matter, Molecular Absorption, Stellar Spectra, Absorption Spectra, Hydrogen, Line Spectra, Molecular Rotation, Vibrational Spectra

Scientific paper

A search for absorption by interstellar C2 molecules, conducted at the (2-0) Phillips band near 8760 A, is reported for three stars. No interstellar absorption is seen in the spectra of 20 Tau and Epsilon Aur, at upper limits of approximately 5 mA and 1 mA, respectively. Toward Zeta Per, however, the R(0), Q(2), and Q(4) lines are detected, and a useful upper limit on the Q(6) line is obtained. The resulting column density, 1.4 x 10 to the 13th to 2.0 x 10 to the 13th per sq cm, and the excitation temperature, T = (78 plus or minus 25) K, show acceptable agreement with an existing theoretical model of the absorbing cloud.

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