论文标题
灾难性变量BG TRI中的超烟
Superhumps in the cataclysmic variable BG Tri
论文作者
论文摘要
我们使用基于地面的观测值，主要来自Rozhen天文台，ASAS-SN，TESS和WASP SKY SKY SURVEYS，对明亮的灾难性变量BG TRI进行了详细的光度研究。我们报告发现具有p $ _ { - sh} $ = 0.1515（2）天的负超人的发现，并在2019年和2020年的数据中发现具有P = 3.94（53）天的共存的超大变化。带有p $ _ {+sh} $ = 0.1727（14）天的正面数据的积极超级人口。 $ \ varepsilon _ { - } $ = 0.044（1）和积极的超级超额超额$ \ varepsilon _+$ = 0.090（9）为我们提供了系统的质量比（q）独立的光度评估，我们发现这是q $ _- $ _- $ _- $ _- $ = 0.37（2）和Q $ $ _ $ _+_+= 0.40（5）。我们还介绍了BG TRI中的准周期振荡（QPO）和随机变化（闪烁）的研究。光曲线显示出丰富的混合物，同时重叠的准周期为5到25分钟。来自Rozhen天文台的多色（UBVRI）光度观测结果揭示了闪烁幅度向较短波长的典型增加。最近引入了所有研究的光度带中闪烁的光源的$ _ {60} $振幅在2021季的负超人消失时，在系统上降低了。
We present a detailed photometric study of the bright cataclysmic variable BG Tri using ground-based observations mainly from Rozhen Observatory, ASAS-SN, TESS, and WASP sky surveys. We report the discovery of a negative superhump with P$_{-sh}$ = 0.1515(2) days and a co-existing superorbital variation with P=3.94(53) days in data from 2019 and 2020. A positive superhump with P$_{+sh}$ = 0.1727(14) days is also discovered in data from 2006. The obtained negative superhump deficit $\varepsilon_{-}$=0.044(1) and the positive superhump excess $\varepsilon_+$=0.090(9) give us an independent photometric evaluation of the mass ratio (q) of the system, which we find to be q$_-$ = 0.37(2) and q$_+$ = 0.40(5) respectively. We also present a study of the quasi-periodic oscillations (QPOs) and stochastic variability (flickering) in BG Tri. The light curves show a rich mixture of simultaneously overlapping quasi-periods ranging from 5 to 25 minutes. The multi-color (UBVRI) photometric observations from Rozhen Observatory reveal the typical increase of the flickering amplitudes to the shorter wavelengths. The recently introduced A$_{60}$ amplitude of the flickering light source in all studied photometric bands is systematically lower when the negative superhump is gone in season 2021.
