Instrumental capabilities of the Sayan observatory for the study of oscillatory processes on the Sun

✍ Scribed by V. M. Grigoryev; M. L. Demidov; N. I. Kobanov

• Book ID: 104643083
• Publisher: Springer
• Year: 1991
• Tongue: English
• Weight: 314 KB
• Volume: 133
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00149831

✦ Synopsis

During the past decade a number of instruments designed for studying solar oscillations have been developed at the S ayan observatory. A double solar telescope using two Jensch-coelostats and two objective lenses provides the capability to filter lower-order modes. This instrument is also used (in the singletelescope mode) for making observations of the mean magnetic field of the Sun. Spatially-differential methods based on polarization separation of images are best suited for investigations of local oscillations and higher-order modes. These methods make it possible to carry out narrow-band spatial filtering of large wave numbers. They are useful when investigating contrast oscillations as welt as the oscillations and rotation of sunspots and other solar features.