POSITIVE AND NEGATIVE SUPERHUMPS OF THE DWARF NOVA MN DRA

Автор(и)

  • D. A. Samsonov Crimean Astrophysical Observatory, Nauchny, Crimea, 98409, Ukraine, Ukraine
  • E. P. Pavlenko Crimean Astrophysical Observatory, Nauchny, Crimea, 98409, Ukraine, Ukraine
  • M. V. Andreev Terskol Branch of the Institute of Astronomy, Russian Academy of Sciences, Kabarda-Balkaria Republic, 361605, Russia, Russian Federation
  • A. Sklyanov Department of Astronomy, Kazan’ State University, 420008, Russia, Russian Federation
  • A. M. Zubareva Institute of Astronomy, Russian Academy of Sciences, Moscow, 119017, Russia, Russian Federation
  • I. B. Voloshina Sternberg Astronomical Institute, Moscow University, Universitetskiy pr. 13, Moscow, 119992, Russia, Russian Federation
  • V. G. Metlov Sternberg Astronomical Institute, Moscow University, Universitetskiy pr. 13, Moscow, 119992, Russia, Russian Federation
  • S. Yu. Shugarov Sternberg Astronomical Institute, Moscow University, Universitetskiy pr. 13, Moscow, 119992, Russia; Astronomical Institute, Slovak Academy of Sciences, Tatranska Lomnica, 05960, Slovakia,
  • A. V. Golovin Main Astronomical Observatory, National Academy of Sciences of Ukraine, Kiev, 03680 MSP, Ukraine, Ukraine
  • O. I. Antoniuk Crimean Astrophysical Observatory, Nauchny, Crimea, 98409, Ukraine, Ukraine

DOI:

https://doi.org/10.18524/1810-4215.2010.23.85241

Ключові слова:

Binary, cataclysmic stars, superhumps, MN Dra.

Анотація

We present the result of O–C analysis of the dwarf nova MN Dra. It is based on the multi-site photometric observations that were made over 77 nights in August – November, 2009. The total exposure was 433 hours. During this time binary underwent two superoutbursts and five normal outbursts. In superoutbursts the positive superhumps decreased with extremely large P = -(3 - 8) x 10-4 for SU UMa-like dwarf novae, confirming the known behavior of MN Dra in 2003. MN Dra displayed large-amplitude (up to 1.4m in quiescence and 0.1m–0.2m in normal outbursts) negative superhumps. The improved value of negative superhump period is 0.095952(4) d.

Посилання

Antipin S., Pavlenko E.: 2002,A&A,391, 565

Monet D. et al.: 1980,USNO-A2.0. A catalog of Astrometric Standards.

Montgomery M., Bisikalo D.: 2010,MNRAS, 405,1397.

Pavlenko E.P. et. al.: 2010,Astronomy Reports,6, 54.

Warner B.: 1995,Cataclysmic Variable Stars, Cambridge University Press

##submission.downloads##

Опубліковано

2010-12-02

Номер

Том 23 (2010)

Розділ

Статті

Ліцензія

Авторське право (c) 2016 Odessa Astronomical Publications

Creative Commons License

Ця робота ліцензується відповідно до Creative Commons Attribution-NonCommercial 4.0 International License.

Відповідно Закону України про авторське право і суміжні права N 3792-XII від 23 грудня 1993 року