Results 221 to 230 of about 3,638 (265)
, 1926 Some of the next articles are maybe not open access.
Related searches:
Related searches:
Orbits of 11 visual binary stars
New Astronomy, 2008Abstract In this paper, the orbital elements for 11 visual binaries are given and calculated. Eight already possess orbits, but here they are recalculated. The reason is that recent measurements show higher residuals with respect to the corresponding ephemerides calculated by using the orbital elements given in the Sixth Catalog of Orbits of Visual ...
Z. Cvetković +2 more
openaire +1 more source
Precise radial velocity measurements of visual binary stars
Astrophysics and Space Science, 1988The radial Velocity of a selected number of components of visual binaries have been measured. Attention is paid to systems suspected to have third (invisible) companions. A second aim of observation are selected couples from the “Catalog of radial velocities of binary stars” by Dommanget, for which the decision between different orbits is possible by ...
S. Weichinger, K. D. Rakos
openaire +1 more source
Liminosity distribution function for visual binary stars
Astrophysics and Space Science, 1985The ‘cosmic scatter’ of 147 of the best known visual binary stars on the Main Sequence is discussed and a new estimation of the luminosity distribution function for multiple star systems is presented. As long as the mass ratio q of a close binary is not smaller than 0.5, the distribution of close binary components is identical to the van Rhijn ...
openaire +1 more source
Star formation history: Modeling of visual binaries
New Astronomy, 2018Abstract Most stars form in binary or multiple systems. Their evolution is defined by masses of components, orbital separation and eccentricity. In order to understand star formation and evolutionary processes, it is vital to find distributions of physical parameters of binaries.
Y.M. Gebrehiwot +5 more
openaire +1 more source
Statistics of Young Visual Binary Stars: Implications for (Binary) Star Formation
1997It is well known that most main sequence stars are members of binary and multiple systems (e.g. Abt 1983, Herczeg 1984). Recent survey work in nearby star forming regions (such as Taurus and Ophiuchus) has demonstrated that this is also the case for young low-mass pre-main-sequence stars (Zinnecker, Brandner, Reipurth 1992; Reipurth and Zinnecker 1993,
Hans Zinnecker, Wolfgang Brandner
openaire +1 more source
Visual binary star orbits in universal variables
Astrophysics and Space Science, 1995zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Viñuales, E., Cid, R., Elipe, A.
openaire +2 more sources
Orbits of Ten Visual Binary Stars
Chinese Journal of Astronomy and Astrophysics, 2007We present the orbits of ten visual binary stars: WDS 01015+6922, WDS 01424–0645, WDS 01461+6349, WDS 04374–0951, WDS 04478+5318, WDS 05255–0033, WDS 05491+6248, WDS 06404+4058, WDS 07479–1212, and WDS 18384+0850. We have also determined their masses, dynamical parallaxes and ephemerides.
openaire +1 more source
Evidence for mass loss in visual binary stars
Astrophysics and Space Science, 1988The present status of the observational evidence about mass loss in visual binary and multiple systems is reviewed. Particular emphasis is placed on the importance of mass-loss rates measures in these stars, as a systematic study would provide useful constraints in two fields. First, as mass-outflows processes are not modified by the interaction of the
openaire +1 more source
Visual binaries among the barium stars. II - HD 105902
Publications of the Astronomical Society of the Pacific, 1977Photometric and spectroscopic observations are presented of both members of the binary star system HD 105902 (ADS 8448) whose primary component is a barium star of spectral class K5 Ba 2. The visual absolute magnitude for the barium star primary is found to be +2.7 and the distance to the system is 190 pc.
R. B. Culver, O. G. Franz, P. A. Ianna
openaire +1 more source