Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
K.-H. Hofmann and M. Scholz:
Limb-darkening and Radii of Non-Mira M Giant
Models
Astronomy and Astrophysics 335, 637-646 (1998)
Abstract.
Monochromatic limb-darkening and monochromatic radii predicted by the
non-Mira M giant models of Bessell et al. (1989a, 1991) with
3500 K > Teff > 2500 K were computed for selected typical
bandpasses used in
interferometric and lunar occultation work. Problems of defining and
measuring
radii of extended-photosphere stars and the relationship between
different assumptions on limb-darkening and 'measured' radii are
discussed.
Fits of simple uniform disk (UD),
fully darkened disk (FDD) and Gaussian limb-darkening curves
to the visibilities predicted by the non-Mira M giant models were
performed.
These fits show that the FDD curve
is often a surprisingly good approximation to the model-predicted
limb-darkening shape.
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