Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 65, p. 45-51 (2022)
Spectral monitoring of long periodic eclipsing system Epsilon Aurigae during 2008–2010
Y. Kuznyetsova, Researcher,
M. Andreev, Junior Researcher
Main astronomical observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
and Researcher
International Center for Astronomical, Medical and Ecological Research
of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Abstract
The results of spectral observations of eclipsing binary system Epsilon Aurigae are presented. Observations were carried out using the coude echelle spectrograph on 2-m telescope Zeiss-2000 at the Terskol Peak Observatory with spectral resolution R = 45000. Epsilon Aurigae is long periodic eclipsing binary system that consists of F0 supergiant star as first companion and huge gas dust disk as second companion. The uniqueness of this system is that eclipses of star by a gas-dust disk occur with 27.1 years period and continues two years. Presented spectral observations Epsilon Aurigaе were carried out in period May 2008 – May 2009 outside eclipse, December 2009 at the beginning of eclipse and March 2010 within eclipse. Based on the results of observations, an analysis of the variability for Hα line was made and some other spectral lines at the pre-eclipse and eclipse stages. Long-term variations of Hα line profiles were detected.
Key words
Epsilon Aurigae, eps Aur, long-periodical eclipsing system, gas-dust disk, Hα line.
References
Mauclaire, B., Buil, C., Garrel, T., Leadbeater, R., Lopez, A. 2012, JAAVSO, 40, 718
Lucas, G. E., Hopkins, J. L., Stencel, R. E. 2006, The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science, 25
Stencel, R. E. 2012, JAAVSO, 40, 618
Golovin, A., Kuznyetsova, Y., Andreev, M. 2007, Odessa Astronomical Publications, 20, 55
Thompson, D. T., Lutz, B. L., Lockwood, G. W. 1987, ApJ, 321, 450
Saito, M., Kawabata, S., Saijo, K., Sato, H. 1987, PASJ, 39, 135
Kemp, J., Henson, G., Kraus, D. et all. 1986, Astrophysical Journal Letters, 300, L11
Leadbeater, R., Stencel, R. 2010, arXiv:1003.3617
Carrol, S., Guinan, E., McCook, G., Donahue, R. 1991, Astroph. J., 367, 278