Vibrational excited carbon monoxide in IRC + 10216

Details Vibrational excited carbon monoxide in IRC + 10216 Vibrational excited carbon monoxide in IRC + 10216

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...220l.103s&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 220, Mar. 15, 1978, p. L103-L107.

Astronomy and Astrophysics

Astrophysics

11

Carbon Monoxide, Carbon Stars, Interstellar Masers, Microwave Emission, Molecular Excitation, Vibrational Spectra, Lasing, Molecular Rotation, Spectral Line Width, Stellar Envelopes, Stellar Mass Ejection, Stellar Rotation, Thermal Emission

Scientific paper

The J = 1-0 rotational transition has been observed in frequency analyses of the luminous carbon star IRC+10216. This corresponds to the first excited vibrational state of the CO molecule. A maser close to the stellar surface pumped by absorption of 2.3 micron stellar photons is proposed as the mechanism of the emission frequency. Radial acceleration is assumed to be close to the star, because of J = 1-0 transition suggests a fairly constant outflow velocity between the v = 1 and v = 0 emitting regions. The possibility of thermal excitation in the circumstellar shell is also examined, but rejected because of the few rotational levels observed.

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