Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981mnras.195..825l&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 195, June 1981, p. 825-830.
Astronomy and Astrophysics
Astronomy
21
Dwarf Stars, Eclipsing Binary Stars, Infrared Astronomy, Light Curve, Stellar Radiation, Variable Stars, Brightness, Infrared Telescopes, Spectrum Analysis, Stellar Spectrophotometry, Stellar Temperature
Scientific paper
RW Tri, an eclipsing binary, has been observed at the near-infrared wavelengths of 1.25 microns (J), 1.65 microns (H), and 2.2 microns (K), using an InSb photometer at the f/9 focus of a 3.8 infrared telescope, sited in Hawaii. The light curves are presented, which show a deep primary minimum whose depth decreases to longer wavelengths, and a shallow secondary minimum, not seen at optical wavelengths, at phase 0.5. Spectrum analysis indicates a self-consistent model in which the components are a K5 dwarf and a massive white dwarf surrounded by an optically thick disk of substantial physical thickness; infrared colors in and out of eclipse, and eclipse duration have been taken into consideration. The derived parameters are presented, and include: an outer edge disk temperature of 6000-8000 K, an orbit inclination of greater than 80 degrees, and a distance of 400 pc.
Adams Joseph D.
Allen David A.
Lee Jessica T.
Longmore Andrew J.
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