Abstract

In this paper, we present results of refining the characteristics of the eclipsing pre-cataclysmic variable SDSS J162256.6+473051 based on a model analysis of its optical radiation. We used the spectra of the system obtained with the 6-m BTA telescope of SAO RAS and the data from its multi-band photometric observations with the 1.5-m Russian-Turkish telescope RTT150. Calculations of the optical radiation of SDSS J162256.6+473051 were carried out using the method of irradiated atmosphere models. When analyzing the spectra of the system at the minimum brightness, we found the following atmospheric parameter estimates of the sdB sub-dwarf: \({{T}_{{{\text{eff}}}}} = 30{\kern 1pt} 900 \pm 700\) K, \(\log {\kern 1pt} g = 5.85 \pm 0.12\), [He/H] \( = - 0.57 \pm 0.05\). The light curves of SDSS J162256.6+473051 were modeled and a complete set of fundamental parameters of the system was obtained. Their satisfactory agreement with the literature data allows us to conclude that the characteristics of similar systems with weak reflection effects can be analyzed together, even when they are determined using different methods of radiation modeling.

中文翻译：

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具有 sdB 亚矮星 SDSS J162256.6+473051 的预灾变变量的改进参数

摘要

在本文中，我们基于光辐射的模型分析，提出了对食前巨变变量 SDSS J162256.6+473051 的特征进行细化的结果。我们使用了通过 SAO RAS 的 6 米 BTA 望远镜获得的系统光谱和通过 1.5 米俄罗斯-土耳其望远镜 RTT150 获得的多波段光度观测数据。SDSS J162256.6+473051 的光辐射计算采用辐照大气模型的方法进行。在分析系统在最小亮度下的光谱时，我们发现 sdB 亚矮星的大气参数估计如下：\({{T}_{{{\text{eff}}}}} = 30{\kern 1pt} 900 \pm 700\) K, \(\log {\kern 1pt} g = 5.85 \pm 0.12\) , [He/H] \( = - 0.57 \pm 0.05\). 对SDSS J162256.6+473051的光变曲线进行了建模，得到了系统的一整套基本参数。它们与文献数据的令人满意的一致性使我们能够得出结论，可以一起分析具有弱反射效应的相似系统的特性，即使它们是使用不同的辐射建模方法确定的。