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- Volume 80 - Année 2011
- Combined Spectroscopic and Interferometric Orbits for HD 193322
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Combined Spectroscopic and Interferometric Orbits for HD 193322
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Anexidades
Abstract
The star HD 193322 is a remarkable multiple system that lies at the heart of the cluster Collinder 419. Here we report on a new spectroscopic orbit for the central binary (P = 312 d) based on spectra collected over the last decade. We have also obtained long baseline interferometry of the target in the K0-band with the CHARA Array, and the fringe packet from the nearby companion was used to calibrate the visibility of the fringes of the shorter period binary. We performed an analysis of the fringe visibilities from many epochs, position angles, and baselines to obtain an astrometric orbit for the inner binary. We discuss the masses and other properties of the binary from the combined spectroscopic and astrometric results.
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Acerca de: D. Gies
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: T. ten Brummelaar
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: D. O’Brien
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: G. Schaefer
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: E. Grundstrom
Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, U.S.A.
Acerca de: M. V. McSwain
Department of Physics, Lehigh University, Bethlehem, PA, U.S.A.
Acerca de: C. Farrington
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: N. Turner
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: R. Matson
CHARA, Georgia State University, Atlanta, GA, U.S.A.
Acerca de: S. Williams
CHARA, Georgia State University, Atlanta, GA, U.S.A.