Speckle Interferometry at SOAR in 2023
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez, Edgardo Costa
TL;DR
This paper reports extensive speckle-interferometry observations at SOAR in 2023, resolving numerous binary systems, determining or updating their orbits, and emphasizing the synergy with Gaia data for studying close binaries.
Contribution
It presents new high-resolution measurements of binary stars, resolves 42 systems for the first time, and updates orbital parameters, advancing long-term binary monitoring efforts.
Findings
Resolved 42 new binary systems.
Determined or updated 147 orbital solutions.
Complemented Gaia mission data for binary star studies.
Abstract
Results of the speckle-interferometry observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) obtained during 2023 are presented: 1913 measurements of 1533 resolved pairs or subsystems (median separation 0.16") and non-resolutions of 552 targets; 42 pairs are resolved here for the first time. This work continues our long-term effort to monitor orbital motion in close binaries and hierarchical systems. A large number (147) of orbits have been determined for the first time or updated using these measurements. Complementarity of this program with the Gaia mission is highlighted.
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Taxonomy
TopicsAdvanced X-ray Imaging Techniques · Adaptive optics and wavefront sensing · Calibration and Measurement Techniques