scholarly journals On the distribution of visual double stars

1998 ◽  
pp. 31-34
Author(s):  
T. Angelov
Keyword(s):  
Distribution Function ◽  
Double Stars ◽  
Visual Double Stars ◽  
Integrated Distribution Function ◽  
Magnitude Difference

An integrated distribution function is derived for visual double stars according to the magnitude difference ?m between the components. For this purpose the author uses a sample of 1626 double stars with ?m ? [0m ? 4m]. The increment of the descriptive distribution function for an arbitrary increment of the variable ?m is also determined.

scholarly journals CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars

2007 ◽  
Vol 472 (3) ◽  
pp. 1055-1057 ◽  
Author(s):  
D. Sinachopoulos ◽  
P. Gavras ◽  
O. Dionatos ◽  
Ch. Ducourant ◽  
Th. Medupe
Keyword(s):  
Double Stars ◽  
Visual Double Stars ◽  
Magnitude Difference

scholarly journals SPECKLE OBSERVATION OF VISUAL DOUBLE STARS AT BOSSCHA OBSERVATORY: SEPARATION AND MAGNITUDE DIFFERENCE LIMITS

2015 ◽  
Vol 30 (2) ◽  
pp. 223-224
Author(s):  
I PUTU WIRA HADIPUTRAWAN ◽  
MAHASENA PUTRA ◽  
MOCHAMAD IRFAN ◽  
MUHAMMAD YUSUF
Keyword(s):  
Double Stars ◽  
Visual Double Stars ◽  
Magnitude Difference

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.

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