MR丝氨酸高态多线多普勒成像
Multi-line Doppler imaging of MR Ser in high-state
摘要:
多普勒图像在巴耳末,HeI,HeII和CII线,并同时I波段光度的极性MR Ser的介绍和分析。在高质量转移状态下,这颗亮极星的巴耳末和氦多普勒断层图显示了吸积流和伴星加热表面的辐射。作为多普勒断层图像之间的比较的结果,可以约束流的电离结构。最高的电离区被发现在磁层半径附近。吸积柱的光电离模型表明,在这个系统中的巴耳末和氦发射线的产生可以解释的软X射线照明的唯一中心。MR Ser的轨道星历表已被修订。
英文摘要:
Doppler images in Balmer, HeI, HeII and CII lines, and simultaneous I-band photometry of the polar MR Ser are presented and analyzed. The Balmer and Helium Doppler tomograms of this bright polar at high mass transfer state show the emission from the accretion flow and the heated surface of the companion star. As a result of a comparison between the Doppler tomograms the ionization structure of the flow could be constrained. The highest ionization region was found in the vicinity of the magnetospheric radius. Photoionization modeling of the accretion column indicates that the Balmer and Helium emission line production in this system can be explained by the central soft Xray illumination only. The orbital ephemeris of MR Ser has been revised.
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