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Eccentricity distribution of wide binaries
Andrei Tokovinin, Olga Kiyaeva
A sample of 477 solar-type binaries within 67pc with projected separations larger than 50AU is studied by a new statistical method. Speed and direction of the relative motion are d…
Spectroscopic subsystems in nearby wide binaries
Andrei Tokovinin
Radial velocity (RV) monitoring of solar-type visual binaries has been conducted at the CTIO/SMARTS 1.5-m telescope to study short-period systems. Data reduction is described, mean…
Observations of Hierarchical Solar-Type Multiple Star Systems
Lewis C. Roberts, Andrei Tokovinin, Brian D. Mason +2
Twenty multiple stellar systems with solar-type primaries were observed at high angular resolution using the PALM-3000 adaptive optics system at the 5 m Hale telescope. The goal wa…
Speckle interferometry at SOAR in 2014
Andrei Tokovinin, Brian D. Mason, William I. Hartkopf +2
The results of speckle interferometric observations at the SOAR telescope in 2014 are given. A total of 1641 observations were taken, yielding 1636 measurements of 1218 resolved bi…
The unusual quadruple system HD 91962 with a "planetary" architecture
Andrei Tokovinin, David W. Latham, Brian D. Mason
The young nearby solar-type star HD 91962 is a rare quadruple system where three companions revolve around the main component with periods of 170.3 days, 8.85 years, and 205 years.…
Know the Star, Know the Planet. III. Discovery of Late-Type Companions to Two Exoplanet Host Stars
Lewis C. Roberts, Andrei Tokovinin, Brian D. Mason +4
We discuss two multiple star systems that host known exoplanets: HD 2638 and 30 Ari B. Adaptive optics imagery revealed an additional stellar companion to both stars. We collected…