Results 31 to 40 of about 2,942 (136)

A High-resolution Imaging Survey of Massive Young Stellar Objects in the Magellanic Clouds

open access: yesThe Astrophysical Journal
Constraints on the binary fraction of massive young stellar objects (mYSOs) are important for binary and massive star formation theory. Here, we present speckle imaging of 34 mYSOs located in the Large Magellanic Cloud (1/2 Z _⊙ ) and Small Magellanic ...
Venu M. Kalari   +5 more
doaj   +1 more source

Southern Binaries with the Zorro Speckle Camera @ Gemini South

open access: yesThe Astronomical Journal
We present measurements in the context of a survey of southern hemisphere binary and multiple stellar systems observed with the Zorro Speckle dual diffraction-limited optical imaging camera on the 8.1 m Gemini South telescope carried out between 2019 and
Rene A. Mendez   +3 more
doaj   +1 more source

The Discovery of Three Galactic Wolf–Rayet Stars

open access: yesThe Astronomical Journal
Wolf–Rayet stars (WRs) are evolved massive stars in the brief stage before they undergo core collapse. Not only are they rare, but they also can be particularly difficult to find due to the high extinction in the Galactic plane.
Laurella C. Marin   +3 more
doaj   +1 more source

Dynamical investigations of the multiple stars

open access: yesOpen Astronomy, 2017
Two multiple stars - the quadruple star - Bootis (ADS 9173) and the triple star T Taury were investigated. The visual double star - Bootiswas studied on the basis of the Pulkovo 26-inch refractor observations 1982-2013.
Kiyaeva Olga V., Zhuchkov Roman Ya.
doaj   +1 more source

Astrometric Binary Classification via Artificial Neural Networks

open access: yesThe Astrophysical Journal
With nearly two billion stars observed and their corresponding astrometric parameters evaluated in the recent Gaia mission, the number of astrometric binary candidates has risen significantly.
Joe Smith
doaj   +1 more source

Orbital elements of six visual binary stars

open access: green, 2001
M. Scardia   +3 more
  +5 more sources

Analysis of the Gaia Data Release 3 Parallax Bias at Bright Magnitudes

open access: yesThe Astronomical Journal
The combination of visual and spectroscopic orbits in binary systems enables precise distance measurements without additional assumptions, making them ideal for examining the parallax zero-point offset (PZPO) at bright magnitudes ( G  
Ye Ding   +3 more
doaj   +1 more source

Resolving Pleiades Binary Stars with Gaia and Speckle Interferometric Observations

open access: yesThe Astronomical Journal
The Pleiades is the most prominent open star cluster visible from Earth and an important benchmark for simple stellar populations unified by common origin, age, and distance.
Dmitry Chulkov   +2 more
doaj   +1 more source

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