标题： RX J0719.2+6557食双星的高光谱和时间分辨率观测 显示英文标题

标题： High spectral and time resolution observations of the eclipsing polar RX J0719.2+6557

摘要： 我们呈现了在高吸积状态下，使用相对较高的时间（~600秒/15秒）和光谱（2.1 A）分辨率对食双星RX J0719.2+6557进行的相位分辨光谱和多色CCD测光观测。 拖尾光谱图清楚地显示出三个不同的线成分，这些成分具有不同的宽度和径向速度变化。 我们能够通过线去模糊解析所有三个成分，并通过多普勒断层扫描明确地将发射成分与次级星、吸积流的弹道部分以及磁约束部分识别出来。 光变曲线和食曲线提供了关于系统几何结构的额外信息。 显示英文摘要

摘要： We present phase-resolved spectral and multicolor CCD-photometric observations of the eclipsing polar RX J0719.2+6557 obtained with relatively high time (~600 sec/15 sec) and spectral (2.1 A) resolution when the system was in a high accretion state. The trailed spectrograms clearly reveal the presence of three different line components with different width and radial velocity variation. We were able to resolve all three components by line deblending, and by means of Doppler tomography were able to unambiguously identify the emission components with the secondary star, the ballistic part of the accretion stream and the magnetically funnelled part of the stream. The light curves and eclipse profiles provide additional information about the system geometry.