The spectroscopic-speckle triple system HR 6469

Details The spectroscopic-speckle triple system HR 6469 The spectroscopic-speckle triple system HR 6469

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107.1529s&link_type=abstract

The Astronomical Journal, vol. 107, no. 4, p. 1529-1541

Astronomy and Astrophysics

Astronomy

28

Computer Programs, Eclipsing Binary Stars, Luminosity, Photometry, Spectrophotometers, Spectroscopy, Stellar Evolution, Astronomical Observatories, Precision, Radial Velocity, Stefan-Boltzmann Law, Telescopes

Scientific paper

HR 6469 consists of an evolved G star and a close pair of stars, believed to be on the main sequence, the brighter of which is an early F star. Shallow eclipses have been detected in the close pair and the components of the wide system have been resolved over most of the orbit by speckle interferometry (McAlister & Hartkopf, Second Catalog of Interferometric Observations of Binary Stars, Center for High Angular Resolution Astronomy, Contribution No. 2 (CHARA), 1988). This paper presents radial velocities, obtained at the David Dunlap, McDonald, Kitt Peak and Dominion Astrophysical Observatories, for the G star and the primary of the close pair, along with solutions for elements of both the long- and short-period orbits, from those radial velocities and the speckle data, some of which have not previously been published. New spectrophotometry permits revisions of both the evolved star's spectral classification and the rotational velocity of the primary of the close pair, but not detection of the spectrum of the third component. These results, in combination with those from the light-curve solution of Van Hamme et al (1994), enable us to determine the masses, radii, and luminosities of all three stars, and to discuss the evolutionary state of the system.

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