Speckle interferometry at SOAR in 2019

Abstract

The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2019 are given, totaling 2555 measurements of 1972 resolved pairs with separations from 15 mas (median 0.21") and magnitude difference up to 6 mag, and non-resolutions of 684 targets. We resolved for the first time 90 new pairs or subsystems in known binaries. This work continues our long-term speckle program. Its main goal is to monitor orbital motion of close binaries, including members of high-order hierarchies and Hipparcos pairs in the solar neighborhood. We give a list of 127 orbits computed using our latest measurements. Their quality varies from excellent (25 orbits of grades 1 and 2) to provisional (47 orbits of grades 4 and 5).

arXiv commentAccepted by The Astronomical Journal. 10 pages, 5 Figures. Measurements and non-resolutions, published electronically, are available from the first author. arXiv admin note: substantial text overlap with arXiv:1905.10436

References in corpus (23)

• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of 14,000 F and G dwarfs
• Speckle interferometry at the Blanco and SOAR telescopes in 2008 and 2009
• Speckle interferometry at SOAR in 2012 and 2013
• SOAR TESS Survey. I: Sculpting of TESS planetary systems by stellar companions
• Speckle interferometry and orbits of "fast" visual binaries
• The Solar Neighborhood XXXVII: The Mass-Luminosity Relation for Main Sequence M Dwarfs
• Ten years of speckle interferometry at SOAR
• The Updated Multiple Star Catalog
• Speckle interferometry at SOAR in 2014
• Observations of Binary Stars with the Differential Speckle Survey Instrument. VII. Measures from 2010 September to 2012 February at the WIYN Telescope
• Observations of Binary Stars with the Differential Speckle Survey Instrument. VI. Measures During 2014 at the Discovery Channel Telescope
• Unconstrained Astrometric Orbits for Hipparcos Stars with Stochastic Solutions
• SOAR Adaptive Module (SAM): seeing improvement with a UV laser
• Speckle interferometry at SOAR in 2016 and 2017
• High-resolution imaging at the SOAR telescope
• Orbits for eighteen visual binaries and two double-line spectroscopic binaries observed with HRCAM on the CTIO SOAR 4m telescope, using a new Bayesian orbit code based on Markov Chain Monte Carlo
• Binary stars in Upper Scorpius
• Speckle Interferometry of Red Dwarf Stars
• Observations of Binary Stars with the Differential Speckle Survey Instrument. VIII. Measures of Metal-Poor Stars and Triple Stars from 2015 to 2018
• Speckle interferometry of secondary components in nearby visual binaries
• The discrepancy between dynamical and theoretical mass in the triplet-system 2MASS J10364483+1521394
• Photometry of Beta Lyrae in 2018 by the BRITE satellites

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