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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

(Volume 80 - Année 2011)
Article
Open Access

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.

Pour citer cet 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.

A propos de : D. Gies

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

A propos de : T. ten Brummelaar

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

A propos de : D. O’Brien

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

A propos de : G. Schaefer

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

A propos de : E. Grundstrom

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

A propos de : M. V. McSwain

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

A propos de : C. Farrington

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

A propos de : N. Turner

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

A propos de : R. Matson

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

A propos de : S. Williams

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