Advances in Astronomy and Space Physics, Volume 4, Issue 1-2, PP. 25-27 (2014)
doi: 10.17721/2227-1481.4.25-27
doi: 10.17721/2227-1481.4.25-27
Low-resolution spectroscopy of the chromospherically
active stars 61 Cyg AB with small telescopes
active stars 61 Cyg AB with small telescopes
1Main Astronomical Observatory of the NAS of Ukraine, Akademika Zabolotnoho Str. 27, Kyiv 03680, Ukraine
2Taras Shevchenko National University of Kyiv, Glushkova ave., 4, Kyiv 03127, Ukraine
2Taras Shevchenko National University of Kyiv, Glushkova ave., 4, Kyiv 03127, Ukraine
Abstract
We carried out high-speed low-resolution spectroscopy of two stars, 61 Cyg A and B with small telescopes. They are known as chromospherically active stars of the K5V (A) and K7V (B) spectral types. These two stars are supposed to have high-powered chromospheres. Spectroscopic monitoring of both stars showed variations of intensity in the Balmer lines and the Mg b triplets at time intervals ranging from seconds to several minutes. From the spectrum data one can find that relative variations in the Hα , Hβ lines and the Mg b triplets are about 1% and the relative power of chromospheric activity about 2 • 10−4.
Keywords:
instrumentation: detectors, methods: observational, techniques: image, processing techniques: spectrometric, stars: imaging