scholarly journals Micrometric measures and orbits of southern visual double stars

2015 ◽  
Vol 336 (4) ◽  
pp. 378-387 ◽  
Author(s):  
R. W. Argyle ◽  
A. Alyner ◽  
F. van Leeuwen
Keyword(s):  
Double Stars ◽  
Visual Double Stars

Spectroscopic Observations of Visual Double Stars

1965 ◽  
Vol 5 ◽  
pp. 109-111
Author(s):  
Frederick R. West
Keyword(s):  
Radial Velocity ◽  
High Dispersion ◽  
Velocity Difference ◽  
Spectrograph Slit ◽  
Spectroscopic Observations ◽  
Double Stars ◽  
Visual Double Stars ◽  
Relative Orbit ◽  
Two Component ◽  
Star Images

There are certain visual double stars which, when close to a node of their relative orbit, should have enough radial velocity difference (10-20 km/s) that the spectra of the two component stars will appear resolved on high-dispersion spectrograms (5 Å/mm or less) obtainable by use of modern coudé and solar spectrographs on bright stars. Both star images are then recorded simultaneously on the spectrograph slit, so that two stellar components will appear on each spectrogram.

scholarly journals Astrometric Standard Fields for CCD Observations of Double Stars

1994 ◽  
Vol 161 ◽  
pp. 291-293
Author(s):  
D. Sinachopoulos ◽  
E. Oblak ◽  
M. Geffert ◽  
J. Colin ◽  
J.-F. LeCampion ◽  
...  
Keyword(s):  
Scientific Community ◽  
Photometric Data ◽  
Stellar Systems ◽  
European Network ◽  
Multiple Star ◽  
Double Stars ◽  
Visual Double Stars ◽  
Ccd Observations ◽  
Formation And Evolution ◽  
Selection Of

The number of known double stars is steadily increasing, thanks to ground-based and space observations. Therefore the ratio of known double to single stars has to be revised upwards continuously. With the Hipparcos parallaxes it will be possible to get stellar statistics for precisely defined volumes of space. This will lead to strong constraints on all astrophysical calibrations of masses, spectral types and luminosities in the solar neighbourhood. A European network of laboratories was created in August 1990 in order to remedy the lack of photometric data for close visual double stars. This network intends to study all aspects of formation and evolution of double and multiple star systems. The immediate goal of the group is to provide the scientific community with a compilation of known photometric data on a large selection of close visual double stars and to significantly enlarge this information by new observations with modern devices. A photometric database of stellar systems is being compiled from most widely used photometric systems in collaboration with the ‘Centre de Données Stellaires’ of Strasbourg.

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