New orbits based on speckle interferometry at SOAR. II

Abstract

Orbits of 44 close and fast visual binaries are computed using the latest speckle observations; 23 orbits are determined for the first time, the rest are revisions, some quite substantial. Six combined orbits use radial velocities. The median period is 15.6 years, the shortest period is one year. Most stars are nearby late-type dwarfs. Dynamical parallaxes and estimates of the masses are derived from the orbital elements and the photometry of the components.

Accepted for publication in AJ. 10 pages, 3 tables, 3 figures. Table 2 (ASCII) is available from the author

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• Speckle interferometry at SOAR in 2016 and 2017
• SPOTS: The Search for Planets Orbiting Two Stars. III. Complete Sample and Statistical Analysis
• The Solar Neighborhood XLIX: New Discoveries and Orbits of M Dwarf Multiples with Speckle Interferometry at SOAR
• Spectroscopic orbits of nearby stars
• Observations of Binary Stars with the Differential Speckle Survey Instrument. VIII. Measures of Metal-Poor Stars and Triple Stars from 2015 to 2018
• Orbital elements and individual component masses from joint spectroscopic and astrometric data of double-line spectroscopic binaries
• BG Ind: the nearest doubly eclipsing, compact hierarchical quadruple system
• Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses
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• The Interferometric Binary Epsilon Cancri in Praesepe: Precise Masses and Age
• Spectroscopic orbits of nearby solar-type dwarfs. II
• First light of a holographic aperture mask: Observation at the Keck OSIRIS Imager
• Speckle-interferometric study of close visual binary system Hip 11253 (HD14874) using Gaia (DR2) and (EDR3)