The angular diameter of R Leonis at 2.16 microns

Details The angular diameter of R Leonis at 2.16 microns The angular diameter of R Leonis at 2.16 microns

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249..397d&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 2, Sept. 1991, p. 397-400.

Astronomy and Astrophysics

Astronomy

32

Infrared Astronomy, Late Stars, Light Curve, Lunar Occultation, Mira Variables, Diameters, Hydrogen Atoms, Infrared Telescopes, Stellar Atmospheres

Scientific paper

A lunar occultation of the Mira variable R Leonis was recorded with the TIRGO infrared telescope through a CVF filter centered on the Br-gamma line of atomic hydrogen at 2.16 microns. Analysis of the light-curve leads to an angular diameter of phi = 33 +/-1.3 mas, from which an effective temperature of 2450 +/-150 K may be derived. These results, when compared to previously published measurements, are consistent with the hypothesis of a wavelength-dependent extent of the stellar atmosphere.

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