Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...268..309d&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 268, May 1, 1983, p. 309-318.
Astronomy and Astrophysics
Astrophysics
28
Diameters, Giant Stars, Infrared Interferometers, Infrared Stars, Stellar Structure, Stellar Temperature, Angular Distribution, Diffraction Patterns, Late Stars, Michelson Interferometers, Near Infrared Radiation, Visibility
Scientific paper
Angular diameter measurements at 2.2 microns are reported for the late-type giant stars Alpha Boo, Alpha Tau, Gamma Dra, Beta And, and Mu Gem. Using the well-known Michelson method, fringe visibilities are measured in the vicinity of the first null of the visibility function. The fringe disappearance is readily found for visibility levels of a few percent, and very accurate angular sizes are derived. Values for the effective temperatures of the observed stars are found which fit the T(eff)-(V-K) relation obtained by Ridgway et al. (1980) for normal giant stars of luminosity class III. A new effective temperature of 4240 + or - 118 K is found for the well-studied star Alpha Boo.
Conti Giancarlo
di Benedetto G. P.
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