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The fundamentals: angular diameter measurements of zero-crossing stars from the NPOI
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Paper Abstract

We recently used archival and newly obtained data from the Navy Precision Optical Interferometer to measure the fundamental properties of 87 stars. The sample consisted of 5 dwarfs, 3 subgiants, 69 giants, 3 bright giants, and 7 supergiants, and spanned a wide range of spectral classes from B to M. We combined our angular diameters with photometric and distance information from the literature to determine each star’s physical radius, effective temperature, bolometric flux, luminosity, mass, and age. Several dozen of the stars have visibility curves sampled down to the first null, where the visibilities drop to zero. Here we present preliminary results showing limb-darkening fits for the five zero crossing stars that have the best coverage of the second lobe.

Paper Details

Date Published: 9 July 2018
PDF: 8 pages
Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107012D (9 July 2018); doi: 10.1117/12.2312603
Show Author Affiliations
Ellyn K. Baines, U.S. Naval Research Lab. (United States)
Fabien Baron, Georgia State Univ. (United States)
J. Thomas Armstrong, U.S. Naval Research Lab. (United States)
Henrique R. Schmitt, U.S. Naval Research Lab. (United States)
James A. Benson, U.S. Naval Observatory (United States)
R. T. Zavala, U.S. Naval Observatory (United States)


Published in SPIE Proceedings Vol. 10701:
Optical and Infrared Interferometry and Imaging VI
Michelle J. Creech-Eakman; Peter G. Tuthill; Antoine Mérand, Editor(s)

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