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arXiv 1209.4062astro-ph.SR
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深食矮新星PU UMa的轨道周期和超峰周期

The orbital and superhump periods of the deeply eclipsing dwarf nova PU UMa

Jeremy Shears, Franz-Josef Hambsch, Colin Littlefield, Ian Miller, Etienne Morelle, Roger Pickard, Jochen Pietz, Richard Sabo

摘要:

我们报告了2009年和2012年PU Uma超爆发期间的未过滤测光。振幅比平均静止期高4.5个量级,持续至少9至10天。超驼峰的峰间振幅高达约0.3等,因此确认它是SU UMa矮新星家族的一员。2012年爆发后期的平均超峰周期为Psh = 0.08076(40)d。对最小日食时间的分析,以及其他研究人员的数据补充,揭示了Porb的轨道周期= 0.077880551(17)d。超峰期的超额值为λ = 0.037(5)。在2012年爆发期间,这是两次观测中最好的一次,日食的半高宽持续时间从9.5分钟逐渐下降到5分钟。

英文摘要:

We report unfiltered photometry during superoutbursts of PU UMa in 2009 and 2012. The amplitude was 4.5 magnitudes above mean quiescence and lasted at least 9 to 10 days. Superhumps were present with a peak-to-peak amplitude of up to ~0.3 mag, thereby confirming it to be a member of the SU UMa family of dwarf novae. The mean superhump period during the later part of the 2012 outburst was Psh = 0.08076(40) d. Analysis of the eclipse times of minimum, supplemented with data from other researchers, revealed an orbital period of Porb = 0.077880551(17) d. The superhump period excess was epsilon = 0.037(5). During the 2012 outburst, which was the better observed of the two, the FWHM eclipse duration gradually declined from 9.5 to 5 min. The eclipse depth was up to 1.7 magnitudes.

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