Swedish Solar Telescope
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Telescope Swedish Solar Telescope |
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| Swedish Solar Telescope building | |
| Type | Solar telescope |
| Location | La Palma |
| Geographic coordinates | 28 ° 45 '34.8 " N , 17 ° 52' 50.5" W |
| wavelength | visible light |
| Aperture | 98 cm
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| Installation | March 2, 2002 |
| Specialty | Second largest lens telescope in the world |
The Swedish Solar Telescope (SST for short) is a telescope for solar observation with an opening one meter in diameter. It is located in the Roque de los Muchachos observatory on La Palma . It is operated by the Institute for Solar Physics of the Royal Swedish Academy of Sciences .
The telescope has an opening width of 98 cm. This makes it the second largest lens telescope in the world after the Yerkes refractor built in 1895 . A technical problem that limits the use of the Yerkes telescope and other large telescopes is deformation under their own weight. With the SST, this disruption is minimized by the fact that the actual telescope is installed vertically in a tower. On the roof of the approximately 30 m high building, the sunlight is directed into the interior of the tower telescope via a zolostat that tracks the movement of the sun .
The interior of the telescope is heated by the solar radiation. A resulting convection of the air inside the telescope would impair the resolution . In order to circumvent this restriction, the tube of the SST is evacuated .
The telescope is equipped with adaptive optics , which analyze the image of the sun 1000 times per second in order to compensate for the unrest in the atmosphere. The control of the adaptive optics is a particular challenge. When observing the night sky, fixed stars or an artificial star can be used as a reference. During the day, however, these are outshone. Therefore, details of the sun's photosphere serve as a comparison image for solar observation . Unlike stars, their image is not point-like. Also, they're not entirely stationary. The entire image of the sun is therefore used to calculate the corrections by the adaptive optics. This technique was first used at the Sacramento Peak Solar Observatory in the USA and further developed for the SST's predecessor telescope.
Web links
Individual evidence
- ↑ Scharmer, Goran B .; Bjelksjo, Klas; Korhonen, Tapio K .; Lindberg, Bo; Petterson, Bertil: The 1-meter Swedish solar telescope . In: SPIE (Ed.): Proceedings of the SPIE . 4853, February 2003, pp. 341-350. doi : 10.1117 / 12.460377 .