Binary star astrometry with milli and sub-milli arcsecond precision
| Autor: | Jankov S., Cvetković Z., Pavlović R. |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Serbian Astronomical Journal, Vol 2014, Iss 188, Pp 1-21 (2014) |
| Druh dokumentu: | article |
| ISSN: | 1450-698X 1820-9289 |
| DOI: | 10.2298/SAJ1488001J |
| Popis: | 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. |
| Databáze: | Directory of Open Access Journals |
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