9 July 2018 The fundamentals: angular diameter measurements of zero-crossing stars from the NPOI
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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.
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Ellyn K. Baines, Fabien Baron, J. Thomas Armstrong, Henrique R. Schmitt, James A. Benson, and R. T. Zavala "The fundamentals: angular diameter measurements of zero-crossing stars from the NPOI", Proc. SPIE 10701, Optical and Infrared Interferometry and Imaging VI, 107012D (9 July 2018); doi: 10.1117/12.2312603; https://doi.org/10.1117/12.2312603

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