Spectro-Interferometrically Resolved Angular Diameters of Giants and Supergiants

Details Spectro-Interferometrically Resolved Angular Diameters of Giants and Supergiants Spectro-Interferometrically Resolved Angular Diameters of Giants and Supergiants

Publishing date

Jan 2009

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21349117h&link_type=abstract

Journals

American Astronomical Society, AAS Meeting #213, #491.17; Bulletin of the American Astronomical Society, Vol. 41, p.469

Science

Astronomy and Astrophysics

Field

Astronomy

Type

Scientific paper

Abstract

We present narrow-band angular diameters of a set of Giants and Supergiants from each of five K-band (2.0-2.4 µ) channels measured with the Palomar Testbed Interferometer. Diameters measured in resolved spectral channels containing absorption features (such as the CO band and Br γ line) are compared with the diameters measured for the continuum. White-light (wide band) diameters for these objects, published in van Belle et al., 1999 and van Belle et al., 2008, empirically determined the dependence of linear size on V-K color for Luminosity Class I, II and III stars. This work expands on those results by investigating the effects of metallicity on the measured diameters. We discuss these results in the context of current stellar evolution theory. Support provided by a bequest by William Herschel Womble to the University of Denver Astronomy Program, and partial support from the Rocky Mountain NASA Space Grant Consortium.

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