Angular diameter measurements of stars

Details Angular diameter measurements of stars Angular diameter measurements of stars

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....101.2207m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 101, June 1991, p. 2207-2219.

Astronomy and Astrophysics

Astronomy

151

Astrometry, Diameters, Stellar Structure, Interferometry, Limb Darkening, Stellar Atmospheres

Scientific paper

Angular diameters determined with the Mark III Optical Interferometer are presented for 12 stars at wavelengths of 450 and 800 nm. The uniform disk diameters resulting from fits to the visibility observations have rms residuals of order 1 percent for the 800 nm measurements and less than 3 percent for the 450 nm measurements. The improvement over previous observations with this instrument is due to improved data analysis and the use of a wider range of baseline lengths. An analysis of the calibration systematics for the Mark III Optical Interferometer is included. There is good agreement between these measurements and previously published data. The changes in uniform disk diameter between wavelengths of 450 and 800 nm agree with models of stellar atmospheres.

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