First Results of the Optical Speckle Interferometry with the 3.5 m Telescope at Calar Alto (Spain): Measurements and Orbits of Visual Binaries
Abstract
We present the first results of optical speckle interferometry of visual binaries obtained with the 3.5m telescope at Calar Alto (Almería, Spain) in July 2005. During this campaign fifty stars were observed with angular separations between 0.058' and 2.1'. New orbits for binaries COU 490 and A 2257, and improved orbits for COU 606, A 225, A 2189, COU 1785, COU 2416, and COU 327 AB, along with their systemic masses, were calculated. The first estimations of distance for the COU 490 (145 pc) and the A 2257 (210 pc) were accomplished thanks to the previously obtained dynamical parallaxes and to the known spectral and photometric data. Total masses for systems with both new and improved orbits are given, those being concordant with their known spectral types and photometric data. We conclude that with the 3.5m telescope we can routinely obtain good optical speckle data for binary systems with angular separations close to its diffraction limit.
- Publication:
-
Highlights of Spanish Astrophysics V
- Pub Date:
- 2010
- DOI:
- 10.1007/978-3-642-11250-8_142
- Bibcode:
- 2010ASSP...14..491D