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Circumstellar debris and pollution at white dwarf stars
New Astronomy Reviews ( IF 6 ) Pub Date : 2016-04-01 , DOI: 10.1016/j.newar.2016.03.001
J. Farihi

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.

中文翻译:

白矮星的环绕恒星碎片和污染

现在已知或怀疑行星碎片的环绕恒星盘紧密围绕数百颗白矮星运行。迄今为止,数据和理论都支持完全包含在先前巨星半径内的圆盘,因此一定是在白矮星阶段产生的。物质落入原始恒星表面的特征加强了这张图片;圆盘总是与大气重元素一起被检测到。这些碎片与白矮星宿主丰度之间的物理联系使人们能够通过它们的残余物对太阳系外行星系统的整体化学进行独特的了解。这篇综述总结了支持大部分白矮星、第一代主序行星系统残余、动态活跃行星系统的证据。
更新日期:2016-04-01
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