Multicolour observations of nearby visual double stars. New CCD measurements and orbits

被引：11
|
作者：
Lampens, P
Strigachev, A
机构：
[1] Royal Observ Belgium, B-1180 Brussels, Belgium
[2] Bulgarian Acad Sci, Inst Astron, BU-1784 Sofia, Bulgaria
来源：
ASTRONOMY & ASTROPHYSICS | 2001年 / 368卷 / 02期
关键词：
stars : binaries : visual stars : fundamental parameters; stars : nearby; techniques : photometric; astrometry;
D O I：
10.1051/0004-6361:20010024
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present multicolour CCD observations of nine nearby visual double stars obtained in August and September 1999 with the 1.3-m telescope at Skinakas Observatory*. The results consist of relative positions (epochs, angular separations and position angles) and differential BVRI photometry. We confirm the physical association in eight cates. Previously known orbits do not match the new data for three systems. Orbits have been recalculated when sufficient data were available. We principally improve the precision of the known orbits for three binaries and show thr acute lack of precision in two other cases. In one case? the components are shown to move apart with a linear relative speed of 0.050 " /yr.
引用
收藏
页码：572 / 579
页数：8
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