论文标题

PNV J00444033+4113068:带有0.7磁振幅和非红色的早期超烟

PNV J00444033+4113068: early superhumps with 0.7 mag amplitude and non-red color

论文作者

Tampo, Yusuke, Isogai, Keisuke, Kojiguchi, Naoto, Uemura, Makoto, Kato, Taichi, Tordai, Tamás, Vanmunster, Tonny, Itoh, Hiroshi, Dubovsky, Pavol A., Medulka, Tomáš, Sano, Yasuo, Hambsch, Franz-josef, Taguchi, Kenta, Maehara, Hiroyuki, Ito, Junpei, Nogam, Daisaku

论文摘要

在WZ SGE型矮人Nova(DN)爆发的最初几天,2:1共振引起了积聚磁盘中的螺旋臂结构,在光学光曲线中可以观察到早期的超级峰。本文报告了我们对黯然失色的WZ SGE型DN PNV J00444033+4113068的光学观察结果,其2021年Superoutburst具有380万Seimei Teimecope和VSNET协作。日食分析的轨道周期为0.05542534(1)d。我们的观察结果证实了早期的超烟,振幅为0.7 mag,这是已知的WZ SGE型DNE中最大的振幅。更有趣的是,它的早期超级烟是其次要最低限度周围最红的,而其他WZ SGE型DNE则显示了最高早期超级人口最红色的颜色。爆发峰值周围的光谱显示He II 4686Å〜和H $α$的双峰发射线,峰间隔为$ \ ge 700 $ km/s,支持了非常高的集合系统。借助早期的超级映射,PNV J00444033+4113068的早期超级峰的独特轮廓和颜色成功地由具有垂直扩展的双臂结构的积聚磁盘成功地复制。因此,PNV J00444033+4113068在PNV J00444033+4113068中的巨大幅度和独特的色彩行为可以通过2:1共振模型以及其他WZ SGE型型DNE来解释。

In the first days of WZ Sge-type dwarf nova (DN) outbursts, the 2:1 resonance induces a spiral arm structure in the accretion disk, which is observed as early superhumps in optical light curves. This paper reports our optical observations of an eclipsing WZ Sge-type DN PNV J00444033+4113068 during its 2021 superoutburst with the 3.8m Seimei telescope and through VSNET collaboration. The eclipse analysis gave its orbital period as 0.055425534(1) d. Our observations confirmed early superhumps with an amplitude of 0.7 mag, the largest amplitude among known WZ Sge-type DNe. More interestingly, its early superhumps became the reddest around their secondary minimum, whereas other WZ Sge-type DNe show the reddest color around the early superhump maximum. The spectrum around the peak of the outburst showed the double-peaked emission lines of He II 4686Å~ and H$α$ with a peak separation of $\ge 700$ km/s, supporting a very high-inclination system. With the early superhump mapping, the unique profile and color of the early superhump of PNV J00444033+4113068 are successfully reproduced by the accretion disk with vertically extended double arm structure. Therefore, the large amplitude and unique color behavior of the early superhumps in PNV J00444033+4113068 can be explained by the 2:1 resonance model along with other WZ Sge-type DNe.

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