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arXiv 0912.4056astro-ph.SR
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矮新星RX J1715 .6+6856的超峰周期测量

Measuring the superhump period of the dwarf nova RX J1715.6+6856

Jeremy Shears, Ian Miller, Richard Sabo

摘要:

我们报告了2009年8月首次确认的矮新星RX J1715.6+6856超爆发的未过滤CCD观测结果。在静止时,这颗恒星的星等为18.3等(CCD,清晰)。爆发的幅度至少为2.4级,持续了至少6天,尽管爆发的第一部分可能被错过了。光变曲线的分析揭示了峰间振幅为0.1等的超级峰,从而表明它是SU UMa家族的成员。平均超峰周期为Psh = 0.07086(78)d,超峰周期超出值为λ = 0.038,估计质量比q = 0.167。在爆发的最后阶段,当恒星接近静止时,超峰消失,取而代之的是对应于轨道周期的调制。2007年8月至2009年9月期间,该恒星被定期监测,共发现12次爆发,爆发频率约为每月一次。

英文摘要:

We report unfiltered CCD observations of the first confirmed superoutburst of the dwarf nova RX J1715.6+6856 in August 2009. At quiescence the star was magnitude 18.3 (CCD, clear). The outburst amplitude was at least 2.4 magnitudes and it lasted at least 6 days, although the first part of the outburst was probably missed. Analysis of the light curve revealed superhumps with peak-to-peak amplitude of 0.1 magnitude, thereby showing it to be a member of the SU UMa family. The mean superhump period was Psh = 0.07086(78) d with a superhump period excess of epsilon = 0.038 and an estimated mass ratio q = 0.167. In the final stages of the outburst, as the star approached quiescence, the superhumps disappeared to be replaced by a modulation corresponding to the orbital period. The star was regularly monitored between August 2007 and September 2009 revealing a total of 12 outbursts, with an outburst frequency of approximately once per month.

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