论文标题
两个灾难变量的光学表征：RBS 0490和SDSS J075939.79+191417.3
Optical characterization of two cataclysmic variables: RBS 0490 and SDSS J075939.79+191417.3
论文作者
论文摘要
我们提出了两个灾难变量（CVS），即RBS 0490和SDSS J075939.79+191417.3的光学光度和光谱观察结果。 RBS 0490的光学变化发生在1.689 $ \ pm $ 0.001小时的周期，这似乎是系统的轨道周期。 SDSS J075939.79+191417.3的当前光度观察确认并完善了先前确定的轨道周期为3.14240928 $ \ pm $ 0.0000000096小时。 SDSS J075939.79+191417.3的光曲线中的长期蚀特征的存在表明蚀可能是由于积聚盘和亮点。 SDSS J075939.79+191417.3的轨道倾斜度估计为$ \ sim $ 78 $^\ circ $使用Eclipse形态。 RBS 0490轨道循环期间的梯形光曲线变化提供了从独立的第二吸积区或第二次vain杆发射的证据。 RBS 0490和SDSS J075939.79+191417.3的光谱显示出强的Balmer的存在，弱He II（$λ$ 4686）的发射线，以及检测强$Hβ$发射线的强度宽度很高。 RBS 0490的特征似乎有利于低场面，而SDSS J075939.79+191417.3似乎与非磁性系统相似。
We present optical photometric and spectroscopic observations of two Cataclysmic Variables (CVs), namely RBS 0490 and SDSS J075939.79+191417.3. The optical variations of RBS 0490 have been found to occur at the period of 1.689$\pm$0.001 hr which appears to be a probable orbital period of the system. Present photometric observations of SDSS J075939.79+191417.3 confirm and refine the previously determined orbital period as 3.14240928$\pm$0.00000096 hr. The presence of long-duration eclipse features in the light curves of SDSS J075939.79+191417.3 indicates eclipses might be due to an accretion disc and bright spot. The orbital inclination of SDSS J075939.79+191417.3 is estimated to be $\sim$ 78 $^\circ$ using the eclipse morphology. The phased-light curve variations during the orbital cycle of RBS 0490 provide evidence of the emission from an independent second accretion region or a second fainter pole. Optical spectra of RBS 0490 and SDSS J075939.79+191417.3 show the presence of strong Balmer, weak He II ($λ$4686) emission lines, along with the detection of strong $Hβ$ emission lines with a large value of equivalent width. The characteristic features of RBS 0490 seem to favour low-field polars, while SDSS J075939.79+191417.3 appears to be similar to the non-magnetic systems.
