Results 31 to 40 of about 374,157 (297)

Classical Observations of Visual Binary and Multiple Stars [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractChanges in the double star database are highlighted, describing various methods of observation (both historically and those of the past few years) and their effectiveness in different regimes of separation space. The various niches for wide- and narrow-field work as they apply to double and multiple stars are examined and the different types of
Brian D. Mason
openalex   +3 more sources

Visual binary stars: data to investigate formation of binaries [PDF]

Baltic astronomy (2016), Vol. 25, pp. 419-426, 2017
Statistics of orbital parameters of binary stars as well as statistics of their physical characteristics bear traces of star formation history. However, statistical investigations of binaries are complicated by lacking or incomplete observational data and by a number of observational selection effects.
Dana Kovaleva, O. Malkov, L. R. Yungelson, Dmitry Chulkov   +3 more
arxiv   +3 more sources

Visual Orbits of Wolf–Rayet Stars. II. The Orbit of the Nitrogen-rich Wolf–Rayet Binary WR 138 Measured with the CHARA Array

The Astrophysical Journal
Classical Wolf–Rayet (WR) stars are descendants of massive OB-type stars that have lost their hydrogen-rich envelopes and are in the final stages of stellar evolution, possibly exploding as Type Ib/c supernovae.
Amanda Holdsworth, Noel Richardson, Gail H. Schaefer, Jan J. Eldridge, Grant M. Hill, Becca Spejcher, Jonathan Mackey, Anthony F. J. Moffat, Felipe Navarete, John D. Monnier, Stefan Kraus, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Sorabh Chhabra, Isabelle Codron, Jacob Ennis, Tyler Gardner, Mayra Gutierrez, Noura Ibrahim, Aaron Labdon, Cyprien Lanthermann, Benjamin R. Setterholm   +21 more
doaj   +2 more sources

Kinematics of Hipparcos Visual Binaries. I. Stars whit Orbital Solutions [PDF]

Open Astronomy, 2001
A. Bartkevičius, A. Gudas
openalex   +4 more sources

Mean densities of visual binary stars.

The Astronomical Journal, 1961
M. A. Giannuzzi, L. Bianco
openalex   +3 more sources

Note on the Comparative Eccentricities of Visual and Spectroscopic Binary Stars [PDF]

Monthly Notices of the Royal Astronomical Society, 1908
T. J. J. See
openalex   +3 more sources

Graphical determination of orbits of visual binary stars

The Astronomical Journal, 1928
J. J. Nassau, P. D. Wilkins
openaire   +3 more sources

Spectroscopic Orbits of Subsystems in Multiple Stars. IX

The Astronomical Journal, 2023
New spectroscopic orbits of inner subsystems in 14 hierarchies are determined from long-term monitoring with the optical echelle spectrometer, CHIRON.
Andrei Tokovinin
doaj   +1 more source

Detecting New Visual Binaries in Gaia DR3 with Gaia and Two Micron All Sky Survey (2MASS) Photometry. I. New Candidate Binaries within 200 pc of the Sun

The Astronomical Journal, 2023
We present a method to identify likely visual binaries in Gaia eDR3 that does not rely on parallax or proper motion. This method utilizes the various point-spread function sizes of Two Micron All Sky Survey (2MASS)/Gaia, where at
Ilija Medan, Sébastien Lépine
doaj   +1 more source

The application of multiple metrics in deformable image registration for target volume delineation of breast tumor bed

Journal of Applied Clinical Medical Physics, Volume 23, Issue 12, December 2022., 2022
Abstract Background and purpose For postoperative breast cancer patients, deformable image registration (DIR) is challenged due to the large deformations and non‐correspondence caused by tumor resection and clip insertion. To deal with it, three metrics (fiducial‐, region‐, and intensity‐based) were jointly used in DIR algorithm for improved accuracy ...
Xin Xie, Yuchun Song, Feng Ye, Hui Yan, Shulian Wang, Xinming Zhao, Jianrong Dai   +6 more
wiley   +1 more source