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interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2020, as well as earlier unpublished data, are given, totaling 1735 measurements of 1288 resolved pairs and non-resolutions of 1177 targets.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.
@article{arxiv.2105.07040,
title = {Speckle Interferometry at SOAR in 2020},
author = {Andrei Tokovinin and Brian D. Mason and Rene A. Mendez and Edgardo Costa and Andrew W. Mann and Todd J. Henry},
journal= {arXiv preprint arXiv:2105.07040},
year = {2021}
}
Comments
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