Superoutburst of a New Sub-Period-Minimum Dwarf Nova CSS130418 in Hercules
Typ dokumentu
articlePeer-reviewed
publishedVersion
Autor
Chochol, D.
Shugarov, S.
Katysheva, N.
Volkov, I.
Zharova, A.
Pavlenko, E.
Pit, N.
Zvagelsky, R.
Antoniuk, O.
Baklanov, A.
Borisov, N.
Gabdeev, M.
Práva
Creative Commons Attribution 4.0 International Licensehttp://creativecommons.org/licenses/by/4.0/
openAccess
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Zobrazit celý záznamAbstrakt
Multicolour photometry of a new dwarf nova CSS130418 in Hercules, which underwent superoutburst on April 18, 2013, allow to classified it as a WZ Sge-type dwarf nova. The phase light curves for different stages of superoutburst are presented. The early superhumps were used to determine the orbital period Porb = 64.84(1) minutes, which is shorter than the period minimum ~78 minutes for normal hydrogen-rich cataclysmic variables. We found the mean period of ordinary superhumps Psh = 65.559(1) minutes. The quiescent spectrum is rich in helium, showing double peaked emissionlines of H I and He I from accretion disk, so the dwarf nova is in a late stage of stellar evolution.
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