Circumstellar debris and pollution at white dwarf stars
Circumstellar debris and pollution at white dwarf stars
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DOI：
10.1016/j.newar.2016.03.001
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发表时间：
2016-04-01
影响因子：
6
通讯作者：
Farihi, J.
中科院分区：
文献类型：
--
作者：
Farihi, J.
现在已知或怀疑行星碎片的星周盘紧密地围绕着数百颗白色矮星运行。到目前为止，数据和理论都支持盘完全包含在之前的巨星半径内，因此必须在白色矮星阶段产生。这张照片被落在原始恒星表面的物质的特征所加强;磁盘总是与大气重元素一起被检测到。这些碎片和白色矮星宿主丰度之间的物理联系，使我们能够通过它们的残留物对太阳系外行星系统的大量化学物质进行独特的了解。这篇综述总结了支持动力学活跃行星系统的证据，在所有白色矮星的大部分，第一代，主序星行星系统的残余物，从而提供洞察初始条件以及长期的动力学和演化。(C)© 2016 Elsevier B. V.版权所有。
Circumstellar disks of planetary debris are now known or suspected to closely orbit hundreds of white dwarf stars. To date, both data and theory support disks that are entirely contained within the preceding giant stellar radii, and hence must have been produced during the white dwarf phase. This picture is strengthened by the signature of material falling onto the pristine stellar surfaces; disks are always detected together with atmospheric heavy elements. The physical link between this debris and the white dwarf host abundances enables unique insight into the bulk chemistry of extrasolar planetary systems via their remnants. This review summarizes the body of evidence supporting dynamically active planetary systems at a large fraction of all white dwarfs, the remnants of first generation, main-sequence planetary systems, and hence provide insight into initial conditions as well as long-term dynamics and evolution. (C) 2016 Elsevier B.V. All rights reserved.