The fundamental bands of CO as chromospheric indicators in late-type giant stars

Details The fundamental bands of CO as chromospheric indicators in late-type giant stars The fundamental bands of CO as chromospheric indicators in late-type giant stars

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...205l..43h&link_type=abstract

Astrophysical Journal, vol. 205, Apr. 1, 1976, pt. 2, p. L43-L45.

Astronomy and Astrophysics

Astrophysics

12

Carbon Monoxide, Chromosphere, Giant Stars, Late Stars, Molecular Spectra, Stellar Spectra, Atmospheric Models, Emission Spectra, Line Spectra, Spectral Bands, Stellar Atmospheres

Scientific paper

Synthetic spectra are presented for the vibrational-rotational fundamental transitions in the ground electronic state of CO for the upper-photosphere-lower-chromosphere atmospheric model of Arcturus derived by Ayres (1975). It is found that the CO spectrum is formed in LTE and the strongest molecular lines exhibit emission cores reflecting the chromospheric temperature rise. The CO fundamental bands offer an excellent observational probe for the presence of stellar chromospheres and a consistency check for chromospheric models derived from traditional chromospheric indicators.

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