Publications of the MPIfR Optical & Infrared
Interferometry Group
1) I.I. Balega, Y.Y. Balega, K.-H.
Hofmann, E.A. Pluzhnik, D.
Schertl, Z.U. Shkhagosheva and G. Weigelt
Orbits of new Hipparcos binaries. I*
Astronomy and Astrophysics, 433 (Issue 2),
p.591-596 (2005)
Abstract
We present first orbits for 6 new Hipparcos binaries. The orbits were
determined from speckle interferometric measurements collected mainly
at
the6m BTAtelescope of the Special Astrophysical Observatory in
Zelenchuk. Three of the systems, HIP 11352, HIP 14075 and
HIP 14230, have late G- or early K-type components, while
HIP 14669 = GJ 125, HIP 106972 = GJ 4210 and
HIP 111685 = GJ 4287 have M-type components. The periods
of the orbits are in the range of6-28years. Mass sums and their errors
are derived for the systems. The Hipparcos parallax error is the
dominating error source of themass determination.
Based on observations made with the 6-m BTA telescope, which is
operated
by the Special Astrophysical Observatory, Russia.
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2) Balega,
I.I., Balega, Y.Y., Hofmann,
K.-H., Malogolovets, E.V., Schertl, D., Shkhagosheva, Z.U., Weigelt, G.
Orbits of new Hipparcos binaries.II.
Astronomy & Astrophysics, 448, pg.703-707 (2006)
Abstract
We continue the presentation of new orbits for Hipparcos binaries
determined from regular speckle interferometric
observations. Most of the data were collected
in the period between 1998.77 and 2004.82 using the 6 m
BTA telescope of the Special Astrophysical Observatory
in Zelenchuk. New orbits are presented for six pairs: HIP 4809, HIP
4849, HIP 5531, HIP 19206, HIP 105947, and HIP 114922.
One of the pairs, HIP 114922, has M dwarf components orbiting with a
period of 19.72 yr. Two binaries, HIP 4809
and HIP 5531, have luminosity class IV components.
The periods of the orbits range from 7.30 yr
to 28.99 yr.
All of the orbits can be considered definitive; however, the
total mass error for the systems remains high,
mainly due to
Hipparcos parallax error.
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