Publications of the MPIfR
Optical & Infrared
Interferometry Group
Malogolovets, E.V., Balega, Y.,
Hofmann, K.-H., Rastegaev, D.A., Weigelt, G.:
Speckle Interferometry of Two Low-mass Triple
Systems in the Solar Neighborhood
ESO
Workshop: "Multiple stars across the H-R diagram"
held on July 12-15, 2005 in Garching, Germany
ESO Astrophysics Symposia, pg.125-128 (2008)
Abstract
Multiple systems with low levels of hierarchy are important targets for
the study of formation, evolution, and dynamical stability of multiple
stars. Two such triple stars with low mass components, GJ 900 and KUI
99, have been observed during the last six years at the 6 m BTA
telescope (Zelenchuk). The first object is a young system with
projected distances between the components in the range of 200-700 mas.
The second one is a group of middle-aged K dwarfs.
In the V and I bands, the observations were performed using the speckle
camera described in [7]. In the K-band the data were obtained with the
speckle camera of the Max-Planck-Institut fuer Radioastronomie in Bonn.
The mean square error of the speckle measurements is 2-4 mas, depending
on seeing conditions. The speckle images were reconstructed using the
triple correlation method [6]. Below, we present the results of the
relative motion study in the systems and give conclusions about their
hierarchy.
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