POSITIVE AND NEGATIVE SUPERHUMPS OF THE DWARF NOVA MN DRA
DOI:
https://doi.org/10.18524/1810-4215.2010.23.85241Ключові 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
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2010-12-02
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