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arXiv 0905.0325astro-ph.SR
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日食中间极地V597小狗(新星Puppis 2007)

The eclipsing Intermediate Polar V597 Pup (Nova Puppis 2007)

Brian Warner, Patrick A. Woudt

摘要:

2008年,在爆发后4个月,对V597 Pup进行了光度观测,比最大值低9.1等,没有显示出一定的轨道调制,但显示出以261.9 s为中心的五重振荡,并以约2.68 h^{-1}的频率均匀分裂。一年后,该系统的亮度又下降了2.5等,出现了周期为2.6687小时的深食,261.9秒的调制幅度也降低了。524 s处的“次谐波”附近经常有功率,这表明观察到的较短周期实际上是一次谐波。因此,V597 Pup是一个中间极性,处于“轨道周期间隔”。此外,它是第一个显示出明显的二次日食,这是由于光学厚盘在二次恒星的辐射侧前面通过而造成的。

英文摘要:

Photometric observations of V597 Pup made in 2008, 9.1 mag below maximum, 4 months after eruption, showed no certain orbital modulation but exhibited a quintuplet of oscillations centred on a period 261.9 s and uniform splitting at a frequency ~2.68 h^{-1}. One year later the system had fallen in brightness by a further 2.5 mag, showed deep eclipses with a period of 2.6687 h, and the 261.9 s modulation at a reduced amplitude. There is often power near the `subharmonic' at 524 s, showing that the shorter periods observed are actually first harmonics. V597 Pup is thus an intermediate polar and is in the `orbital period gap'. Furthermore it is the first to show a prominent secondary eclipse, caused by passage of the optically thick disc in front of the irradiated side of the secondary star.

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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