Results 11 to 20 of about 4,122 (255)
Orbits of Binary Stars: from Visual Measures to Speckle Interferometry
The Astronomical JournalKnowledge of the orbits of visual binary stars has always been one of the fundamentals of astronomy. Based historically on the visual measures, nowadays the orbits rely more (or exclusively) on the accurate speckle data.
Andrei Tokovinin
doaj +3 more sources
The mass-ratio distribution of Visual Binary Stars [PDF]
Astrophysics and Space Science, 1990 The selection effects that govern the observations of Visual Binary Stars are investigated, in order to obtain a realistic statistical distribution of the mass-ratioq=Msec/Mprim. To this end a numerical simulation programme has been developed, which ‘generates’ binary stars and ‘looks’ at them to determine whether an observer on Earth would be able to ...
openaire +2 more sources
Central Star of NGC 3132: A Visual Binary [PDF]
Symposium - International Astronomical Union, 1978 A faint companion to HD 87892 (V=10.07, B-V=+0.09, U-B=+0.10, Sp.A2) has been discovered with the 3.6 m telescope (prime focus) of the European Southern Observatory at La Silla having the following parameters: separation ψ = 1″.65, position angle θ = 226°.3.
L. Kohoutek, S. Laustsen
openaire +1 more source
Visual binary stars with known orbits in Gaia EDR3
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT A total of 3350 objects from the Sixth Catalog of Orbits of Visual Binary Stars (ORB6) are investigated to validate Gaia Early Data Release 3 (EDR3) parallaxes and provide mass estimates for the systems. We show that two-thirds of binaries with a separation of 0.2–0.5 arcsec are left without a parallax solution in EDR3.
Dmitry Chulkov, Oleg Malkov
openaire +2 more sources
Visual Binaries: Cross-Matching and Compiling of a Comprehensive List
Open Astronomy, 2015 Visual binary stars make up the largest set among observed types of binaries (currently more than 110 000 systems are known containing more than 230 000 components).
Isaeva A. A. +2 more
doaj +1 more source
Visual Orbits and Alignments of Planet-hosting Binary Systems
The Astronomical Journal, 2023 Roughly half of Solar-type planet hosts have stellar companions, so understanding how these binary companions affect the formation and evolution of planets is an important component to understanding planetary systems overall.
Kathryn V. Lester +9 more
doaj +1 more source
Statistical Analysis of a Comprehensive List of Visual Binaries
Open Astronomy, 2015 Visual binary stars are the most abundant class of observed binaries. The most comprehensive list of data on visual binaries compiled recently by cross-matching the largest catalogues of visual binaries allowed a statistical investigation of ...
Kovaleva D. +4 more
doaj +1 more source
Spectroscopic Orbits of Subsystems in Multiple Stars. XI
The Astronomical JournalAdding to the large radial velocity survey of nearby solar-type stars (summary in Tokovinin, 2023a), spectroscopic orbits are determined for four hierarchical systems: HIP 49442 (inner and outer periods of 164.55 days and 34 yr, respectively), HIP 55691 (
Andrei Tokovinin
doaj +1 more source
Synergistic perspectives—How single‐molecule biophysics complement biochemical understanding
FEBS Letters, EarlyView.In this review, we discuss how ensemble biochemistry and single‐molecule approaches are complementary, outline commonly used single‐molecule techniques, and illustrate their relevance through two representative case studies: chromatin organization by SMC complexes and pathway choice during DNA double‐strand break repair.
Sara De Bragança +2 more
wiley +1 more source
Orbits of Twelve Multiple Stars
The Astronomical JournalInner and outer orbits in 12 hierarchical stellar systems are determined using high-resolution speckle imaging, radial velocities, or both. Masses and fluxes of the components are estimated. The Hipparcos numbers of the main stars are 7111, 12912, 17895,
Andrei Tokovinin
doaj +1 more source