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Proceedings Paper

Limb darkening studies with the NPOI
Author(s): Thomas A. Pauls; Robert B. Hindsley; Roger A. Bell
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Paper Abstract

We are now extending the studies of the angular diameters and limb darkening of K giant stars to K supergiants and dwarfs using the Navy Prototype Optical Interferometer (NPOI). Our goal is to compare our diameters with those predicted from model atmosphere calculations. The K supergiants, (epsilon) Peg, (zetz) Cep, and (xi) Cyg, as well as the K2 dwarf, (epsilon) Eri, have been observed with three elements of the astrometric sub-array. The diameters for giants are in good agreement with model predictions; while the results for supergiants agree less well, the extinction corrections make the comparison more uncertain. The measured diameter for (epsilon) Eri is significantly larger than that predicted by the models. These results show the power of the NPOI for testing fundamental astrophysical theory.

Paper Details

Date Published: 5 July 2000
PDF: 4 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390257
Show Author Affiliations
Thomas A. Pauls, Naval Research Lab. (United States)
Robert B. Hindsley, Naval Research Lab. (United States)
Roger A. Bell, Univ. of Maryland/College Park (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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