论文标题
发现具有非常强烈的白色矮人的天狼星样二进制系统。磁白矮人之间的二进制
Discovery of a Sirius-like binary system with a very strongly magnetic white dwarf. Binarity among magnetic white dwarfs
论文作者
论文摘要
含有磁性白色矮人和主要序列的二元系统被认为是极为罕见的，也许不存在。在搜索高质量白色矮人中的磁场的过程中，我们发现了一个像小天狼星一样的宽二进制系统，该系统由主序列G0星和$ M \ sim 1.1 \，M_ \ odot $ White Dwarf带有一个巨大的（数百mg）磁场。该恒星WDS J03038+0608B在连续体中显示圆极化幅度为5％，没有证据表明一维时尺度上的可变性，在光谱的蓝色部分中很少或没有线性极化，在光谱的红色部分中约为2％线性极化。文献中的搜索揭示了至少有四个二元系统的存在，包括磁性白矮人和非脱位伴侣 - 三种此类系统在先前的研究中没有通过。我们估计，可能发现多达几个磁白矮人的磁性矮小矮人会发生。但是，具有磁性白色矮人的五个已知二元系统中的至少四个被期望发展为经历Roche Lobe溢出的系统，并且不能被视为磁性灾难性变量的祖细胞（她和她）系统。
Binary systems containing a magnetic white dwarf and a main-sequence star are considered extremely rare, perhaps non-existent. In the course of a search of magnetic fields in high-mass white dwarfs we have discovered a Sirius-like wide binary system composed of a main-sequence G0 star and a $M\sim 1.1\,M_\odot$ white dwarf with a huge (hundreds of MG) magnetic field. This star, WDS J03038+0608B, shows a circular polarisation amplitude of 5% in the continuum, with no evidence of variability in a 1d time-scale, little or no linear polarisation in the blue part of the spectrum, and about 2% linear polarisation in the red part of the optical spectrum. A search in the literature reveals the existence of at least four more binary systems that include a magnetic white dwarf and a non-degenerate companion - three such systems passed unremarked in previous studies. We estimate that up to a few percent of magnetic white dwarfs may be found to occur in wide binary pairs. However, at least four of the five known binary systems with a magnetic white dwarf are too widely separated to be expected to evolve into systems experiencing Roche lobe overflow, and cannot be considered as progenitors of magnetic cataclysmic variable (AM Her and DQ Her) systems.
