446 citations · 6.4k across the 105 of their papers we have counts for
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Verification of astrometrically accelerating stars from Hipparcos and Gaia: I. Methodology and application to HIP 44842
Valeri V. Makarov, Andrei Tokovinin
A large number of candidate binary stars with apparent acceleration on the sky has emerged from analysis of astrometric data collected by the Hipparcos, Tycho-2, and Gaia space mis…
Speckle Interferometry at SOAR in 2023
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez +1
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 resol…
Spectroscopic Orbits of Subsystems in Multiple Stars. X (Summary)
Andrei Tokovinin
Results of a large program of spectroscopic monitoring of nearby solar-type stellar hierarchical systems using the CHIRON echelle spectrograph at the 1.5 m telescope are summarized…
Dynamics of Four Triple Systems
Andrei Tokovinin
Orbital motions in four hierarchical stellar systems discovered by speckle interferometry are studied. Their inner orbits are relatively well constrained, while the long outer orbi…
Spectroscopic Orbits of Subsystems in Multiple Stars. IX
Andrei Tokovinin
New spectroscopic orbits of inner subsystems in 14 hierarchies are determined from long-term monitoring with the optical echelle spectrometer, CHIRON. Their main components are nea…
Exploring Thousands of Nearby Hierarchical Systems with Gaia and Speckle Interferometry
Andrei Tokovinin
There should be about 10,000 stellar hierarchical systems within 100 pc with primary stars more massive than 0.5 Msun, and a similar amount of less massive hierarchies. A list of 8…
Speckle Interferometry at SOAR in 2021
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez +1
The speckle interferometry program at the the 4.1 m Southern Astrophysical Research Telescope (SOAR), started in 2008, now accumulated over 30,300 individual observations of 12,700…
The Solar Neighborhood XLIX: New Discoveries and Orbits of M Dwarf Multiples with Speckle Interferometry at SOAR
Eliot Halley Vrijmoet, Andrei Tokovinin, Todd J. Henry +3
We present the first results of a multi-year program to map the orbits of M dwarf multiples within 25 parsecs. The observations were conducted primarily during 2019 - 2020 using sp…
Spectroscopic orbits of subsystems in multiple stars. VIII
Andrei Tokovinin
Periods, eccentricities, and masses in hierarchical stellar systems inform us on the formation and early evolution of these fascinating objects. To complement the multiplicity stat…
The family of V1311 Ori: a young sextuple system or a mini-cluster?
Andrei Tokovinin
A compact bound group of four active M-type dwarfs containing V1311 Ori is identified in the Gaia catalog of nearby stars. Located at a distance of 39 pc, it is likely related to t…
Resolved Gaia Triples
Andrei Tokovinin
A sample of 392 low-mass hierarchical triple stellar systems within 100 pc resolved by Gaia as distinct sources is defined. Owing to the uniform selection, the sample is ideally su…
Architecture of Hierarchical Stellar Systems and their Formation
Andrei Tokovinin
Accumulation of new data on stellar hierarchical systems and the progress in numerical simulations of their formation open the door to genetic classification of these systems, wher…
The HD 98800 quadruple pre-main sequence system. Towards full orbital characterisation using long-baseline infrared interferometry
S. Zúñiga-Fernández, J. Olofsson, A. Bayo +8
HD 98800 is a young ( Myr old) and nearby ( pc) quadruple system, composed of two spectroscopic binaries orbiting around each other (AaAb and BaBb), with a gas-rich…
TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries
Veselin B. Kostov, Brian P. Powell, Guillermo Torres +30
We report the discovery of a compact, coplanar, quadruply-lined, eclipsing quadruple star system from TESS data, TIC 454140642, also known as TYC 0074-01254-1. The target was first…
Speckle Interferometry at SOAR in 2020
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez +3
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…
TIC 168789840: A Sextuply-Eclipsing Sextuple Star System
Brian P. Powell, Veselin B. Kostov, Saul A. Rappaport +48
We report the discovery of a sextuply-eclipsing sextuple star system from TESS data, TIC 168789840, also known as TYC 7037-89-1, the first known sextuple system consisting of three…
Inner and Outer Orbits in 13 Resolved Hierarchical Stellar Systems
Andrei Tokovinin
Orbits of inner and outer subsystems in 13 triple or higher-order stellar systems are computed or updated using position measurements and, in three cases, radial velocities. The go…
Statistics of wide pre-main sequence binaries in the Orion OB1 association
Andrei Tokovinin, Monika Petr-Gotzens, Cesar Briceno
Statistics of low-mass pre-main sequence binaries in the Orion OB1 association with separations ranging from 0.6" to 20" (220 to 7400 au at 370 pc) are studied using images from th…
Orbits of Five Triple Stars
Andrei Tokovinin, David Latham
Joint analysis of radial velocities and position measurements of five hierarchical stellar systems is undertaken to determine elements of their inner and outer orbits and, whenever…
Orbits and structure of quadruple systems GJ 225.1 and FIN 332
A. Tokovinin
Only a handful of quadruple systems with two accurate inner visual orbits are known. Architecture of two such systems is studied here to determine period ratios, mutual orbit orien…
Nearby quintuple systems Kappa Tucanae and Xi Scorpii
Andrei Tokovinin
Architecture and parameters of two wide nearby hierarchical systems containing five solar-type stars each, Tuc and Sco, are studied. Using Gaia astrometry and photometry, m…
Speckle interferometry at SOAR in 2019
Andrei Tokovinin, Brian D. Mason, Rene A. Mendez +2
The results of speckle interferometric observations at the 4.1 m Southern Astrophysical Research Telescope (SOAR) in 2019 are given, totaling 2555 measurements of 1972 resolved pai…
Eccentricity distribution of wide low-mass binaries
Andrei Tokovinin
Distribution of eccentricities of very wide (up to 10 kau) low-mass binaries in the solar neighborhood is studied using the catalog of El-Badry and Rix (2018) based on Gaia. Direct…
The quadruple system HIP 45734
Andrei Tokovinin
HIP 45734 is a quadruple system of 2+2 architecture located at 68 pc from the Sun. The outer 9" system A,B has a period of ~10^4 yr. The pair Aa,Ab is a visual binary with a period…