2009 Superoutburst of Dwarf Nova 1RXS J053234.9+624755

• Autorzy: Rutkowski A. , Olech A. , Poleski R. , Sobolewska M. , Kankiewicz P. , Ak T. , Boyd D.
• Języki publikacji: EN

Abstrakty

EN

We present photometric observations of the dwarf nova 1RXS J053234.9+624755. We performed a detailed analysis of the superoutburst that occurred in August 2009. We found the superhump period to be P_sh=0.057122(14) days. Based on the O-C diagram we conclude that P_sh increased during the plateau at the rate of dP_sh/dt=(9.24±1.4)×10^-5. Both the O-C analysis and evolution of the superhumps light curve favor the model in which superhumps originate in a variable source located in the vicinity of the hot spot. In addition, the evolution of the light curve suggests that the superhump light source approaches the disk plane as the superoutburst declines. Detailed analysis of the superoutburst plateau phase enabled us to detect a signal which we interpret as apsidal motion of the accretion disk. We detected additional modulations during the final stage of the superoutburst characterized by periods of 104 s and 188 s which we tentatively interpret as quasi periodic oscillations. Estimations of A0 and An are in agreement with the dependence between the amplitude of superhumps and the orbital inclination.

Słowa kluczowe

EN

accretion; accretion disks; novae; cataclysmic variables; stars: dwarf novae; stars: individual: 1RXS J053234.9+624755

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2010
• Tom: Vol. 60, No. 4
• Strony: 337--355
• Opis fizyczny: Bibliogr. 28 poz., tab., wykr.

Twórcy

autor

Rutkowski A.

• TUBITAK National Observatory, Akdeniz University Campus, 07058 Antalya, Turkey

autor

Olech A.

• Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warszawa, Poland

autor

Poleski R.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland

autor

Sobolewska M.

• Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138, USA
• Foundation for Research and Technology - Hellas, IESL, Voutes, 71110 Heraklion, Crete, Greece
• University of Crete, Department of Physics, Voutes, 71003 Heraklion, Crete, Greece

autor

Kankiewicz P.

• Astrophysics Division, Institute of Physics, Jan Kochanowski University, Świętokrzyska 15, 25-406 Kielce, Poland

autor

Ak T.

• TUBITAK National Observatory, Akdeniz University Campus, 07058 Antalya, Turkey
• Istanbul University, Faculty of Sciences, Department of Astronomy and Space Sciences, 34119 University, Istanbul, Turkey

autor

Boyd D.

• British Astronomical Association, Variable Star Section, West Challow OX12 9TX, England

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