Results 11 to 20 of about 81,865 (295)

Atmospheric and Fundamental Parameters of the Individual Components of Multiple Stellar Systems

open access: yesThe Astronomical Journal, 2023
We present detailed analyses of eight triple stellar systems (lying between 20 and 155 pc) and nine quadruple stellar systems (lying between 20 and 250 pc) with different configurations. Most of these systems are hierarchical.
Enas M. Abu-Alrob   +2 more
doaj   +1 more source

Investigation Limb darkening for short period AB Andromeda eclipsing binary star

open access: yesPolytechnic Journal, 2023
This work deal with characterizing the limb darkening coefficients for the short period binary stars AD Andromeda to determine the size, luminosities and masses of the Individual stars as well as orbital size and orientation of the binary system ...
Chiman Ibrahim Hussein Mrs
doaj   +1 more source

The mass ratio distribution of B-type visual binaries in the Sco OB2 association [PDF]

open access: yes, 2001
The sample of 115 B-type stars in Sco OB2 association is examined for existence of visual companions with ADONIS near-infrared adaptive optics system and coronograph in J and K bands. Practically all components in the separation range 0.3"-6" (45-900 A.U.
A. Tokovinin   +34 more
core   +2 more sources

The Mass-Ratio Distribution of Visual Binary Stars [PDF]

open access: yes, 1990
The selection effects that govern the observations of Visual Binary Stars are in- vestigated, in order to obtain a realistic statistical distribution of the mass-ratio q = Msec=Mprim.
Hogeveen, S.J.
core   +1 more source

Star-crossed Lovers DI Tau A and B: Orbit Characterization and Physical Properties Determination

open access: yesThe Astrophysical Journal, 2023
The stellar companion to the weak-line T Tauri star DI Tau A was first discovered by the lunar occultation technique in 1989 and was subsequently confirmed by a speckle imaging observation in 1991.
Shih-Yun Tang   +7 more
doaj   +1 more source

Visual Orbits and Alignments of Planet-hosting Binary Systems

open access: yesThe 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

Searching for faint companions with VLTI/PIONIER. II. 92 main sequence stars from the Exozodi survey [PDF]

open access: yes, 2014
The Exozodi survey aims to determine the occurrence rate of bright exozodiacal discs around nearby main sequence stars using infrared interferometry. Although the Exozodi survey targets have been carefully selected to avoid the presence of binary stars ...
Absil, Olivier   +8 more
core   +4 more sources

A Search for wide visual companions of exoplanet host stars - The Calar Alto Survey [PDF]

open access: yes, 2006
We have carried out a search for co-moving stellar and substellar companions around 18 exoplanet host stars with the infrared camera MAGIC at the 2.2m Calar Alto telescope, by comparing our images with images from the all sky surveys 2MASS, POSS I and II.
Broeg, C.   +5 more
core   +1 more source

Visual Binaries: Cross-Matching and Compiling of a Comprehensive List

open access: yesOpen 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

JWST Observations of the Enigmatic Y-Dwarf WISE 1828+2650. I. Limits to a Binary Companion

open access: yesThe Astrophysical Journal, 2023
The Y-dwarf WISE 1828+2650 is one of the coldest known brown dwarfs with an effective temperature of ∼300 K. Located at a distance of just 10 pc, previous model-based estimates suggest WISE1828+2650 has a mass of ∼5–10 M _J , making it a valuable ...
Matthew De Furio   +22 more
doaj   +1 more source

Home - About - Disclaimer - Privacy