Speckle Interferometry at SOAR in 2020

The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope in 2020, as well as earlier unpublished data, are given, totaling 1735 measurements of 1288 resolved pairs and nonresolutions of 1177 targets. We resolved for the first time 59 new pairs or sub...

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Bibliographic Details
Published in:The Astronomical journal 2021-08, Vol.162 (2), p.41
Main Authors: Tokovinin, Andrei, Mason, Brian D., Mendez, Rene A., Costa, Edgardo, Mann, Andrew W., Henry, Todd J.
Format: Article
Language:English
Subjects:
Astronomy
Astrophysical research
Binary stars
Dwarf stars
Hierarchies
Interferometric observation
Interferometry
Multiple stars
Solar neighborhood
Speckle interferometry
Stellar associations
Subsystems
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Summary:The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope in 2020, as well as earlier unpublished data, are given, totaling 1735 measurements of 1288 resolved pairs and nonresolutions of 1177 targets.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.
ISSN:0004-6256
1538-3881
DOI:10.3847/1538-3881/ac00bd