Binary star astrometry with milli and sub-milli arcsecond precision

• 出版年: Serbian Astronomical Journal
• 主要な著者: Jankov S., Cvetković Z., Pavlović R.
• フォーマット: 論文
• 言語: 英語
• 出版事項: Astronomical Observatory, Department of Astronomy, Belgrade 2014-01-01
• 主題: binaries: visual; binaries: spectroscopic; methods: observational; techniques: high angular resolution
• オンライン･アクセス: http://www.doiserbia.nb.rs/img/doi/1450-698X/2014/1450-698X1488001J.pdf
• ISSN: 1450-698X; 1820-9289

The past several decades have seen accelerating progress in improving binary stars fundamental parameters determinations, as new observational techniques have produced visual orbits of many spectroscopic binaries with a milli arcsecond precision. Modern astrometry is rapidly approaching the goal of sub-milli arcsecond precision, and although presently this precision has been achieved only for a limited number of binary stars, in the near future this will become a standard for very large number of objects. In this paper we review the representative results of techniques which have already allowed the sub-milli arcsecond precision like the optical long baseline interferometry, as well as the precursor techniques such as speckle interferometry, adaptive optics and aperture masking. These techniques provide a step forward from milli to sub-milli arcsecond precision, allowing even short period binaries to be resolved, and often resulting in orbits allowing precisions in stellar dynamical masses better than 1%. We point out that such unprecedented precisions should allow for a significant improvement of our comprehension of stellar physics and other related astrophysical topics.