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arXiv 1107.2407astro-ph.SR
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光学引力透镜实验。OGLE数据中的矮新星。I.三个新的矮新星:一个在周期间隙和两个更长的周期物体

The Optical Gravitational Lensing Experiment. Dwarf Novae in the OGLE Data. I. Three New Dwarf Novae: One in the Period Gap and Two Longer Period Objects

R. Poleski, A. Udalski, J. Skowron, M. K. Szymański, M. Kubiak, G. Pietrzyński, I. Soszyński, S. Kozłowski, P. Pietrukowicz, Ł. Wyrzykowski, K. Ulaczyk

摘要:

我们报告了偶然发现的三个新的矮新星,在2010年的爆发观察到正在进行的微透镜调查OGLE-IV。这三个天体都位于银河系凸出区域,观测频率最高为20分钟。在OGLE-III和OGLE-IV的数据中,我们发现其中一颗恒星总共有23次爆发。这个天体最令人感兴趣的是它的超峰周期为2.61小时,将其置于轨道周期间隙中。在超爆发过程中,超峰的周期发生了变化,时间尺度很短。对于我们观测到爆发的另外两个物体,在静止期测得的轨道周期为5.4小时和9.5小时。

英文摘要:

We report serendipitous discovery of three new dwarf novae which eruptions in 2010 were observed by the ongoing microlensing survey OGLE-IV. All three objects are located in the Galactic bulge fields observed with the highest cadence of 20 minutes. In the OGLE-III and OGLE-IV data we revealed a total of 23 outbursts for one of the stars. What makes this object most interesting is the derived superhump period of 2.61 h placing it in the orbital period gap. The superhump period changed during the superoutburst with a very short timescale. For two other objects, for which we observed outburst, the orbital periods of 5.4 h and 9.5 h were measured in the quiescence.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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