Spectral Variability of the Symbiotic Star CH Cyg
DOI:
https://doi.org/10.53560/PPASA(60-1)671Keywords:
Symbiotic Star, Line Profile, Line Intensity, Radial VelocityAbstract
On July 15, 2015, the second telescope of the Shamakhi Astrophysical Observatory (ShAO) was used to collect 14 echelle spectra of the symbiotic star CH Cyg over the course of six hours of nocturnal exposures. Along the profiles of the lines Нα and Нβ, the intensity of line Hel λ5876 Å fluctuates simultaneously with variations in the intensity ratios of the blue and red emission components. The Hel λ5876 Å line’s center intensities and corresponding widths correlate with information from the blue emission component of the lines. There are certain correlations between the radial velocities of the absorption DNaI and the emission line Нα.
References
J. Mikołajewska, Y. Balega, K. Hofmann, and G. Weigelt. First spatial resolution of the stellar components of the interacting binary CH Cygni. Monthly Notices of the Royal Astronomical Society 403: 21–25 (2010).
A. Skopal. ARAS Eruptive Stars Information Letter 13 (01): 31-01 (2015).
F. Rspaev, L. Kondratyeva, and E. Aimuratov. CH Cygni: New Brightening in 2014. Commissions 27 and 42 of the IAU information bulletin on variable stars. Information Bulletin on Variable Stars 6117: 121–124 (2017).
A. Skopal. ARAS Eruptive Stars Information Letter 11: 17-11, 10 (2014).
A. Skopal. ARAS Eruptive Stars Information Letter 14 (02): 28-02, (2015a).
S. Shugarov, A. Sekeras, A. Skopal, and G. Komissarova. Investigation of a rapid photometric variability of the symbiotic system CH Cyg during its current 2014-15 active phase. Physics of Evolved Stars 2015, 8-12 Jun, France 71: 67 (2015a).
S. Shugarov, A. Skopal, M. Sekeras, G. Komissarova, and M. Wolf. Rapid Photometric Variability Of The Symbiotic System CH Cyg During 2008-15. EAS Publications Series 71-72: 107–108 (2015).
A. Skopal. ARAS Eruptive Stars Information Letter 16 (04): 08-05 (2015b).
A. Skopal. ARAS Eruptive Stars Information Letter 17 (05): 19-07 (2015c).
T. Tomov, D. Kolev, U. Munari, and A. Antov. Time-resolved high-resolution spectroscopy of CH
Cygni: evidence for a magnetic propeller state in 1994. Monthly Notices of the Royal Astronomical
Society 278: 542–550 (1996).
M. Burmeister, and L. Leedjarv. Spectroscopy of the symbiotic binary CH Cygni from 1996 to 2007. Astronomy and Astrophysics 504: 171–180 (2009).
S.P.S. Eyres, M.F. Bode, A. Skopal, M.M. Crocker, R.J. Davis, A.R. Taylor, M. Teodorani, L. Errico,
A.A. Vittone, and V.G. Elkin. The symbiotic star CH Cygni – II. The ejecta from the 1998–2000 active
phase. Monthly Notices of the Royal Astronomical Society 335: 526-538 (2002).
K.M. Mikailov, B.N. Rustamov, I.A. Alakbarov, and A.B. Rustamova. Rapid Hα variability in CH Cyg during of night. Azerbaijani Astronomical Journal 10 (3): 25–30 (2015).
K.M. Mikayilov, B.N. Rustamov, I.A. Alakbarov, and A.B. Rustamova. The rapid spectral variability of the symbiotic star CH Cyg during one-night. San Francisco: Astronomical Society of the Pacific 510: 170-173 (2017).
K.M. Mikailov, V.M. Khalilov, and I.A. Alekberov. Cassegrain focus echelle spectrometer of the
-m telescope at the Shamakhy Astrophysical Observatory. Tsirkulyar ShAO 109: 21–29 (2005).
G.A. Galazutdinov. Preprint of the Special Astrophysical Observatory 92: (1992).
A. Natta, V.P. Grinin, and L.V. Tambovtseva. An Interesting Episode of Accretion Activity in UX
Orionis. The Astrophysical Journal 542: 421-427 (2000).
K.H. Hinkle, F.C. Fekel, and R. Joyce. Infrared Spectroscopy of Symbiotic Stars. VII. Binary Orbit
and Long Secondary Period Variability of CH Cygni. The Astrophysical Journal 692: 1360–1373
(2009).
