Speckle Interferometry at SOAR in 2020

Abstract

The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2020, as well as earlier unpublished data, are given, totaling 1735 measurements of 1288 resolved pairs and non-resolutions of 1177 targets. We resolved for the first time 59 new pairs or subsystems in known binaries, mostly among nearby dwarf stars. 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 also report observations of 892 members of young moving groups and associations, where we resolved 103 new pairs.

Accepted by AJ; 11 pages, 6 figures, 5 tables. The data tables are available at http://www.ctio.noao.edu/~atokovin/papers/datafiles2020.tar.gz. arXiv admin note: text overlap with arXiv:2005.05305, arXiv:1905.10436

References in corpus (9)

• Speckle interferometry at SOAR in 2012 and 2013
• New Pre-main-Sequence Stars in the Upper Scorpius Subgroup of Sco-Cen
• TIC 168789840: A Sextuply-Eclipsing Sextuple Star System
• 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
• Spectroscopic orbits of nearby stars
• Inner and Outer Orbits in 13 Resolved Hierarchical Stellar Systems
• 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
• Orbits and masses of binaries from Speckle Interferometry at SOAR

Cited by in corpus (8)

• Speckle Interferometry at SOAR in 2021
• The Solar Neighborhood XLIX: New Discoveries and Orbits of M Dwarf Multiples with Speckle Interferometry at SOAR
• Spectroscopic orbits of subsystems in multiple stars. VIII
• Chasing extreme planetary architectures: I- HD196885Ab, a super-Jupiter dancing with two stars?
• Updated orbital monitoring and dynamical masses for nearby M-dwarf binaries
• A study of the F-giant star $\theta$ Scorpii A: a post-merger rapid rotator?
• A search for Be stars in multiple systems within the solar neighborhood
• CD-27 11535: Evidence for a Triple System in the $\beta$ Pictoris Moving Group