软X射线选极吸积过程的探讨
Probing the accretion processes in soft X-ray selected polars
摘要：
吸积白矮星的高能量数据提供了进入初级吸积引起的能量释放和不同的建议吸积方案的制度。我们进行XMM-牛顿观测的极性选择，因为他们的ROSAT硬度比接近-1.0和模型的吸积柱和吸积区的排放过程。我们的模型考虑了发射区的多温度结构，主要由质量流密度、磁场强度和白矮星质量决定。为了以物理上一致的方式描述从红外到X射线的全光谱能量分布，我们包括恒星的贡献并建立复合模型，这也将与未来的X射线任务相关。我们证实了三个极的X射线软性质。
英文摘要：
High-energy data of accreting white dwarfs give access to the regime of the primary accretion-induced energy release and the different proposed accretion scenarios. We perform XMM-Newton observations of polars selected due to their ROSAT hardness ratios close to -1.0 and model the emission processes in accretion column and accretion region. Our models consider the multi-temperature structure of the emission regions and are mainly determined by mass-flow density, magnetic field strength, and white-dwarf mass. To describe the full spectral energy distribution from infrared to X-rays in a physically consistent way, we include the stellar contributions and establish composite models, which will also be of relevance for future X-ray missions. We confirm the X-ray soft nature of three polars.
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