signature=86c12578fa68f633d2539c5a9a2d73f0,A planetesimal orbiting within the debris disc around a w...

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于 2021-05-30 01:32:17 发布

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研究发现白矮星SDSSJ122859.93+104032.9周围的尘埃盘中，钙II发射线强度和形状呈现123.4分钟的稳定周期性变化。这一短暂信号被解释为内部结构稳定的固态物体存在的迹象，表明该白矮星系统可能拥有行星残留物。

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摘要：

Many white dwarf stars show signs of having accreted smaller bodies, implying that they may host planetary systems. A small number of these systems contain gaseous debris discs, visible through emission lines. We report a stable 123.4min periodic variation in the strength and shape of the CaII emission line profiles originating from the debris disc around the white dwarf SDSSJ122859.93+104032.9. We interpret this short-period signal as the signature of a solid body held together by its internal strength.

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