论文标题
磁白矮人的起源和特性的线索
Clues to the origin and properties of magnetic white dwarfs
论文作者
论文摘要
大量的白色矮人具有一个磁场，其强度范围从几公斤到约1000 mg。然而，当白矮人种群分解为不同的光谱类型时，磁性的发生率会有所不同，从而为白矮星形成磁场的形成线索。在各个进化阶段，已经提出了从化石场来源到发电机生成的磁场来源的几种情况。通常认为偏移偶极子足以模拟场结构，但是时间分辨的光谱观测表明，揭示了更复杂的结构，例如磁斑或多物。这些场结构与测量的旋转速率结合使用的表面映射有助于区分涉及单星进化的场景与涉及二进制相互作用的其他场景。我描述了磁性白矮人（例如年龄，质量和田间强度）的关键观察性特性，并与这些特性面对所提出的形成场景。
A significant fraction of white dwarfs possess a magnetic field with strengths ranging from a few kG up to about 1000 MG. However, the incidence of magnetism varies when the white dwarf population is broken down into different spectral types providing clues on the formation of magnetic fields in white dwarfs. Several scenarios for the origin of magnetic fields have been proposed from a fossil field origin to dynamo generation at various stages of evolution. Offset dipoles are often assumed sufficient to model the field structure, however time-resolved spectropolarimetric observations have revealed more complex structures such as magnetic spots or multipoles. Surface mapping of these field structures combined with measured rotation rates help distinguish scenarios involving single star evolution from other scenarios involving binary interactions. I describe key observational properties of magnetic white dwarfs such as age, mass, and field strength, and confront proposed formation scenarios with these properties.
