Simple model atmospheres incorporating new opacities of VO and TiO

Details Simple model atmospheres incorporating new opacities of VO and TiO Simple model atmospheres incorporating new opacities of VO and TiO

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.241..247b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 241, Nov. 15, 1989, p. 247-257. Research supported by S

Astronomy and Astrophysics

Astronomy

15

Red Giant Stars, Stellar Atmospheres, Titanium Oxides, Vanadium Oxides, Atmospheric Heating, M Stars, Molecular Spectra, Partial Pressure, Stellar Models

Scientific paper

The effect of the VO A-X, VO B-X and TiO-upsilon molecular band opacities upon the atmospheres of red giants is investigated by construction of plane-parallel straight mean opacity models. From these simple preliminary models a limited heating of the upper atmosphere is found producing a temperature rise of up to 100 K. This result and its effect upon computed bandstrengths suggests that these opacities should be included in more accurate model atmospheres of late M stars.

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