...
首页> 外文期刊>The Astrophysical journal >A STUDY OF THE PHOTOMETRIC VARIABILITY OF THE PECULIAR MAGNETIC WHITE DWARF WD 1953–011
【24h】

A STUDY OF THE PHOTOMETRIC VARIABILITY OF THE PECULIAR MAGNETIC WHITE DWARF WD 1953–011

机译:1953–011年特有磁性白矮星WD的光度变异性研究

获取原文
   

获取外文期刊封面封底 >>

       

摘要

We present and interpret simultaneous new photometric and spectroscopic observations of the peculiar magnetic white dwarf WD 1953–011. The flux in the V-band filter and intensity of the Balmer spectral lines demonstrate variability with the rotation period of about 1.45 days. According to previous studies, this variability can be explained by the presence of a dark spot having a magnetic nature, analogous to a sunspot. Motivated by this idea, we examine possible physical relationships between the suggested dark spot and the strong-field magnetic structure (magnetic "spot" or "tube") recently identified on the surface of this star. Comparing the rotationally modulated flux with the variable spectral observables related to the magnetic "spot," we establish their correlation and therefore their physical relationship. Modeling the variable photometric flux assuming that it is associated with temperature variations in the stellar photosphere, we argue that the strong-field area and dark, low-temperature spot are comparable in size and located at the same latitudes, essentially overlapping each other with a possible slight longitudinal shift. In this paper, we also present a new, improved value of the star's rotational period and constrain the characteristics of the thermal inhomogeneity over the degenerate's surface.
机译:我们介绍并解释了特殊的磁性白矮星WD 1953–011的同时进行的新光度学和光谱学观察。 V波段滤波器的通量和Balmer谱线的强度表现出可变性,旋转周期约为1.45天。根据先前的研究,这种可变性可以通过存在类似于黑子的具有磁性的暗点来解释。受此想法的启发,我们研究了建议的暗点与恒星表面最近发现的强磁场磁结构(磁性“点”或“管”)之间的可能物理关系。将旋转调制的通量与与磁性“斑点”相关的可变光谱可观测值进行比较,我们建立了它们的相关性,因此也建立了它们的物理关系。假设可变光度通量与恒星光圈中的温度变化相关联,就可以对其建模,我们认为强场区域和暗低温点的大小可比,并且位于同一纬度,基本上彼此重叠可能会有轻微的纵向偏移。在本文中,我们还提出了一个新的,改进的恒星自转周期值,并限制了退化表面的热不均匀性特征。
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号