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D. Gies, T. ten Brummelaar, D. O’Brien, G. Schaefer, E. Grundstrom, M. V. McSwain, C. Farrington, N. Turner, R. Matson & S. Williams

Combined Spectroscopic and Interferometric Orbits for HD 193322

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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.

To cite this article

D. Gies, T. ten Brummelaar, D. O’Brien, G. Schaefer, E. Grundstrom, M. V. McSwain, C. Farrington, N. Turner, R. Matson & S. Williams, «Combined Spectroscopic and Interferometric Orbits for HD 193322», Bulletin de la Société Royale des Sciences de Liège [En ligne], Volume 80 - Année 2011, 678 - 682 URL : https://popups.uliege.be/0037-9565/index.php?id=3141.

About: D. Gies

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: T. ten Brummelaar

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: D. O’Brien

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: G. Schaefer

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: E. Grundstrom

Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, U.S.A.

About: M. V. McSwain

Department of Physics, Lehigh University, Bethlehem, PA, U.S.A.

About: C. Farrington

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: N. Turner

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: R. Matson

CHARA, Georgia State University, Atlanta, GA, U.S.A.

About: S. Williams

CHARA, Georgia State University, Atlanta, GA, U.S.A.