CO infrared bands in atmospheres of long-period variables

Details CO infrared bands in atmospheres of long-period variables CO infrared bands in atmospheres of long-period variables

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..355h&link_type=abstract

In ESA, Infrared Spectroscopy in Astronomy p 355-358 (SEE N90-19084 11-89)

Astronomy and Astrophysics

Astronomy

Carbon Monoxide, Infrared Spectroscopy, Late Stars, Spectrum Analysis, Stellar Atmospheres, Variable Stars, Infrared Astronomy, Mass Distribution, Spectral Line Width, Spectral Resolution, Stellar Composition, Stellar Envelopes, Stellar Temperature

Scientific paper

The study of the CO infrared bands in atmospheres of long period variables is presented. The 8 Mira and semiregular variables were observed in the CO fundamental band (4.7 microns) and in the first two overtones (2.3 and 1.55 microns) with low resolution spectroscopy. It is shown that the intensities of the different bands do not follow the Boltzmann distribution for a single temperature. In particular no fundamental band is detected. The width of the second overtone was found to significantly broader than that for the first overtone. The results lead to the conclusion that the different bands are characteristics features for different temperature layers in the atmospheres and circumstellar enevelopes of variables.

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