Astrophysics

, Volume 61, Issue 1, pp 64–82 | Cite as

NY Ser: Outburst Activity and Multiperiodic Processes in its Various Stages During 2014 and 2016

  • A. S. Sklyanov
  • E. P. Pavlenko
  • O. I. Antonyuk
  • A. A. Sosnovskij
  • V. P. Malanushenko
  • N. V. Pit’
  • K. A. Antonyuk
  • A. N. Khairutdinova
  • Yu. V. Babina
  • A. I. Galeev
Article
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Results from observation campaigns for the dwarf nova NY Ser during 2014 and 2016 are presented. Data were obtained on a total of 126 nights in 2014 that include 20 normal outbursts and one superoutburst and on 22 nights in 2016 that include 5 normal outbursts. The shape of the curves for the normal outbursts indicated the existence of “outside-in” and “inside-out” outbursts in this system. In different stages of outburst activity (quiescent state, outburst, and superoutburst) NY Ser manifests brightness oscillations with different periods. In the quiescent state and in normal outbursts, the orbital period 0d.097558(6) predominated. During the superoutburst we identified two stages in the evolution of superhumps: a stage in which the tidal instability of the accretion disk increases (A) and a stage with developed superhumps (B). Stage A for NY Ser has been identified for the first time, but its duration and period are not uniquely determined. In stage B, positive superhumps with an average period of 0d.10464(9) and a period excess of ε = 0.072 were recorded and negative superhumps with an average period of 0d.0938(1) and a period deficit of ε = -0.038 were detected for the first time.

Keywords

NY Ser cataclysmic variables negative superhumps evolution of superhumps accretion 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • A. S. Sklyanov
    • 1
  • E. P. Pavlenko
    • 2
  • O. I. Antonyuk
    • 2
  • A. A. Sosnovskij
    • 2
  • V. P. Malanushenko
    • 3
  • N. V. Pit’
    • 2
  • K. A. Antonyuk
    • 2
  • A. N. Khairutdinova
    • 1
  • Yu. V. Babina
    • 2
  • A. I. Galeev
    • 1
    • 4
  1. 1.FGAOU VO “Kazan (Volga) Federal University”KazanRussia
  2. 2.FGBUN “Crimean Astrophysical Observatory, Russian Acadmey of Sciences”CrimeaRussia
  3. 3.Apache Point ObservatoryNew Mexico State UniversitySunspotUSA
  4. 4.Academy of Sciences of the Republic of TatarstanKazanRussia

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