Issue |
Astron. Astrophys. Suppl. Ser.
Volume 124, Number 2, August 1997
|
|
---|---|---|
Page(s) | 353 - 357 | |
DOI | https://doi.org/10.1051/aas:1997198 | |
Published online | 15 August 1997 |
absolute CCD photometry and differential astrometry of
close visual double stars, with G-type primaries
*,**
1
Royal Belgian Observatory, Ring Laan 3, B-1180 Ukkel, Brussels, Belgium
2
University of Thessaloniki, Department of Physics, Section of Astrophysics Astronomy and Mechanics, GR-54006 Thessaloniki, Greece
Send offprint request to: D. Sinachopoulos
Received:
29
May
1996
Accepted:
27
November
1996
We present V magnitudes, () and (
) colours of close visual
double star components, and their differences as well as separations
and position angles of 40 visual double stars.
The common properties of the members of this sample
are the small angular separation ρ , which is less than
,
and the common spectral type of the primaries, which are of G-type.
The observations made with the Bessel U, B and V filters, while
the astrometry was performed in the V filter only. For the
observations, the CCD camera attached to the Cassegrain focus of the
90 cm Dutch telescope, at La Silla, Chile, had been used. From the
analysis of the data we concluded that from the sample of the fourty
double stars observed seven proved to be physical pairs, while the
rest must have common origin components.
Key words: binaries: visual / catalog
© European Southern Observatory (ESO), 1997