Angular diameters of Zeta Aurigae-type supergiants by Michelson interferometry

Details Angular diameters of Zeta Aurigae-type supergiants by Michelson interferometry Angular diameters of Zeta Aurigae-type supergiants by Michelson interferometry

Sep 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...236..449d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 236, no. 2, Sept. 1990, p. 449-454.

Astronomy and Astrophysics

Astrophysics

17

Cool Stars, Eclipsing Binary Stars, Michelson Interferometers, Supergiant Stars, B Stars, Dwarf Stars, K Stars, Limb Darkening, Stellar Luminosity, Stellar Structure

Scientific paper

Interferometric observations are reported for the cool supergiants Zeta Aur, 31 Cyg, and 32 Cyg, first resolved by the 12T interferometer (CERGA) operating at NIR wavelengths. Limb-darkened angular diameters of 5.5 + or - 0.3, 5.7 + or - 0.6 and 5.5 + or - 0.5 marcsec, respectively, are derived for the three stars. Since those supergiants are members of well-known eclipsing binaries, their linear sizes may be obtained, by combining interferometric results with occultation data from eclipse timing and orbital velocity. The resulting stellar radii are: 154 + or - 13, 169 + or - 20 and 215 + or - 33 solar radii, respectively.

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