PoPuPS | Combined Spectroscopic and Interferometric Orbits for HD

Bulletin de la Société Royale des Sciences de Liège - Volume 80 - Année 2011
Combined Spectroscopic and Interferometric Orbits for HD 193322
D. Gies,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
T. ten Brummelaar,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
D. O’Brien,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
G. Schaefer,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
E. Grundstrom,
Department of Physics and Astronomy, Vanderbilt University, Nashville, TN, U.S.A.
M. V. McSwain,
Department of Physics, Lehigh University, Bethlehem, PA, U.S.A.
C. Farrington,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
N. Turner,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
R. Matson,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
S. Williams,
CHARA, Georgia State University, Atlanta, GA, U.S.A.
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 : http://popups.ulg.ac.be/0037-9565/index.php?id=3141.
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