A study of M dwarfs. I - Preliminary model atmospheres

Details A study of M dwarfs. I - Preliminary model atmospheres A study of M dwarfs. I - Preliminary model atmospheres

Jan 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....38..283m&link_type=abstract

Astronomy and Astrophysics, vol. 38, no. 2, Jan. 1975, p. 283-288.

Astronomy and Astrophysics

Astronomy

27

Astronomical Models, Early Stars, M Stars, Stellar Spectra, Subdwarf Stars, Atmospheric Models, Infrared Astronomy, Mixing Length Flow Theory, Molecular Spectra, Opacity, Stellar Atmospheres, Stellar Envelopes

Scientific paper

A sequence of model atmospheres for early M dwarfs is presented. The models contain opacity distribution functions for the most prominent molecular bands in M dwarfs, H2O and TiO. A mixing-length theory of convection is included, and a test on one model shows no dependence of the emergent flux on the mixing-length to scale height ratio. The emergent fluxes are tabulated for comparison with observations. Fair agreement is evident, but the inclusion of atomic line blanketing seems necessary before a discrepancy in the optical continuum gradient can be remedied.

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