Results 41 to 50 of about 2,942 (136)

On Utmost Multiplicity of Hierarchical Stellar Systems

open access: yesOpen Astronomy, 2016
According to theoretical considerations, multiplicity of hierarchical stellar systems can reach, depending on masses and orbital parameters, several hundred, while observational data confirm the existence of at most septuple (seven-component) systems. In
Gebrehiwot Y. M.   +7 more
doaj   +1 more source

A SEARCH FOR POSSIBLE UNRESOLVED COMPONENTS IN EIGHTEEN ECLIPSING BINARIES

open access: yesOdessa Astronomical Publications, 2017
A total of 8507 minima times (6890 visual and 1617 photographic or photoelectric ones) of 18 eclipsing binary stars have been separated and collected from the remarkable collection of late Dieter Lichtenknecker and from the recent literature.
T. Borkovits, T. Hegedus
doaj   +1 more source

Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE

open access: yesThe Astrophysical Journal
We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using Wide-field Infrared Survey Explorer/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 projects (hereafter BYW).
Federico Marocco   +33 more
doaj   +1 more source

Visual binaries among high-mass stars [PDF]

open access: bronze, 2001
Gaspard Duchêne   +3 more
openalex   +1 more source

Spin–Orbit Alignment of Early-type Astrometric Binaries and the Origin of Slow Rotators

open access: yesThe Astrophysical Journal
The spin–orbit alignment of binary stars traces their formation and accretion history. Previous studies of spin–orbit alignment have been limited to small samples, slowly rotating solar-type stars, and/or wide visual binaries that not surprisingly ...
Chase L. Smith   +2 more
doaj   +1 more source

Unveiling Subarcsecond Multiplicity in the Pleiades with Gaia Multicolor Photometry

open access: yesThe Astronomical Journal
The list of 409 probable cluster members down to G = 15 ^mag ( m ≳ 0.5 M _⊙ ) is compiled for the two degree radius of the Pleiades, based on astrometric data from Gaia DR3 and the PPMXL catalog, along with several radial velocity surveys, including ...
Dmitry Chulkov
doaj   +1 more source

The Orbital Period of the Long-period and Colliding-wind Binary WR 146 from Radio Interferometry of the Shock Cone

open access: yesThe Astronomical Journal
We report the first measurement of the orbital period of a long-period colliding-wind-binary system Wolf–Rayet (WR) 146, derived by tracing the rotational morphology of its wind-colliding region (WCR) and the relative orientation of the two binary ...
Shiming Wen   +10 more
doaj   +1 more source

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