论文标题
长时间低质量比深接触二进制kN的光度和光谱研究
Photometric and spectroscopic studies of the long period low mass ratio deep contact binary KN Per
论文作者
论文摘要
长时间低质量比深接触二进制KN的光度分析和光谱研究被执行。 BV（RI）$ _ c $ -band的光曲线来自宁博教育局和Xingming天文台的新疆天文台望远镜（下一个）。通过对Wilson-Devinney（W-D）程序的分析，发现KN作为A型低质量比深接触二进制（Q = 0.236，F = 53.4 \％）。引入了对主要组件的凉爽点，以解释光曲线的不等最大值。基于O-C分析，我们发现增加的轨道周期的速率为$ \ dot {p} $ = 5.12 $ \ pm $（0.30）$ \ times $ 10 $^{ - 7} $ d/yr，这意味着从次要组件到主要组件的大传递。通过分析光谱数据，我们检测到了色球活性发射线指标，这与光曲线分析相对应。收集了71个长时间（p $> $ 0.5天），包括我们的目标，包括我们的目标。 Mass-Radius，Mass-Luminosity和Log M $ _ {t} $ - log J $ _ {O} $的插图研究了所有收集的星星的进化状态。还确定了某些物理参数的关系。对于kN PER的不稳定性参数，我们确定它是目前稳定的接触二进制系统。
The photometric analysis and spectroscopic study of the long period low mass ratio deep contact binary KN Per were executed. The light curves of BV(RI)$_c$-band were from the Ningbo Bureau of Education and Xinjiang Observatory Telescope (NEXT) at the Xingming Observatory. Through the analysis of Wilson-Devinney (W-D) program, KN Per was found as an A-type low mass ratio deep contact binary (q=0.236, f=53.4\%). A cool spot applied on the primary component was introduced to explain the unequal maxima of the light curve. Based on the O-C analysis, we found that the rate of the increasing orbital period is $\dot{P}$ = 5.12 $\pm$ (0.30) $\times$ 10$^{-7}$ d/yr, meaning the mass transfer from the secondary component to the primary one. By analyzing the spectroscopic data, we detected chromospheric activity emission line indicators, which is corresponding to the light-curve analysis. 71 long period (P $>$ 0.5 days) contact binaries including our target were collected. The evolutionary states of all collected stars were investigated by the illustrations of mass-radius, mass-luminosity, and log M$_{T}$ - log J$_{o}$. The relations of some physical parameters were also determined. With the instability parameters of KN Per, we determined that it is a stable contact binary system at present.
