论文标题
用于识别异步方面的时期的点模型
Spot Model for Identifications of Periods in Asynchronous Polars
论文作者
论文摘要
我们改善了Wynn \＆King的无椎间盘增生模型，考虑到由于白色矮人的旋转而变化的方面的影响以及由异步性引起的可变喂养强度，并建立了一种更一般的点模型，该模型对这些效果的不同形式不敏感，并且可以应用于光学和X射线光curve的时期分析。该点模型可以产生与观测值兼容的功率谱，并且其模拟限制了比率$ p_ {spin}/p_ {orb} <2 $之间的白色矮人旋转和二进制轨道频率之间的功率光谱，这是用于识别时期的强标准。然后，我们认识到CAM和1RXS J083842.1-282723的CD IND期间。斑点模型揭示了异步杆的复杂积聚几何形状，这可能表明复杂的磁场会导致其异步。我们认为1RXS J083842.1-282723是前侧面的，因为其最高的异步和稳定的光曲线。给出异步性杆的不稳定积聚过程，长期光曲线的周期分析将使轨道信号突出。
We improved the discless accretion models of Wynn \& King, considering the effects of the changing aspect due to the white dwarf spin and the variable feeding intensity caused by the asynchronism, and set up a more general spot model which is not sensitive to the different forms of these effects and can be applied for the period analysis of the optical and X-ray light curve. The spot model can produce the power spectra compatible with the observations, and its simulations limit the ratio $P_{spin}/P_{orb}<2$ between the powers at the white dwarf spin and the binary orbital frequencies, which is a strong criterion for identification of periods. Then we recognize the periods for CD Ind, BY Cam and 1RXS J083842.1-282723. The spot model reveals a complex accretion geometry in the asynchronous polars, which may indicate that the complex magnetic field causes their asynchronism. We think 1RXS J083842.1-282723 is a pre-polars because of its highest asynchronism and stable light curve. Giving the unstable accretion process in asynchronous polars, the period analysis of the long-term light curve will make the orbital signal prominent.
