BG Canis Minoris/3A0729 + 103: The true spin period revealed?
BG Canis Minoris/3A0729 + 103: The true spin period revealed?
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BG Canis Minoris/3A0729 103：真实的旋转周期揭晓？
DOI：
10.1093/mnras/258.4.697
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发表时间：
1992
影响因子：
4.8
通讯作者：
M. Watson
中科院分区：
文献类型：
--
作者：
A. Norton;I. McHardy;H. Lehto;M. Watson
本文介绍了对中等极性BG CMi的Ginga X射线观测结果。功率谱第一次揭示了除了轨道和自旋周期分别为3.25小时和1.913秒之外，还存在847秒的调制。847 s是913 s和3.25 hr之间的拍频周期，但意味着白色矮星相对于轨道运动的逆行旋转，这是以前从未在激变变星中发现过的，也很难从理论上解释。另一种解释是，白色矮星的自转周期实际上是847秒，913秒的调制代表拍频周期
The results of a Ginga X-ray observation of the intermediate polar BG CMi are presented. The power spectrum reveals for the first time the presence of an 847-s modulation in addition to the accepted orbital and spin periods of ∼3.25 hr and ∼913 s. 847 s is the beat period between 913 s and 3.25 hr, but implies retrograde rotation of the white dwarf with respect to the orbital motion, something which has never previously been found in cataclysmic variables and which is hard to explain theoretically. The alternative explanation, which is suggested here, is that the spin period of the white dwarf is actually 847 s and that the 913-s modulation represents the beat period