论文标题
WD 1856 b：一个围绕白色矮人的近距离行星，可以在一个共同的阶段幸存下来
WD 1856 b: a close giant planet around a white dwarf that could have survived a common-envelope phase
论文作者
论文摘要
发现一个巨大的行星候选者绕着白矮人WD 1856+534的轨道时期1.4 d的发现提出了地球如何达到其当前位置的问题。我们在这里重建了系统的进化历史，假设共同的包膜演变为将行星带到其当前位置的主要机制。我们发现，如果寄主恒星在AGB上时，则可以解释当前的配置，在质量转移开始时，行星的分离在1.69-2.35 au范围内，并且除了在存活的星球的轨道能量外，是否还存储在信封中或其他能源源代替其他能源的源代码源。我们还讨论了在共同包膜演化之前和之后行星的演变。最后，我们发现，如果系统通过共同的包膜演化形成，则其总年龄与银河系薄盘的成员资格一致。因此，我们得出的结论是，常见的包膜演化至少与以前建议的替代形成场景一样的可能性，例如行星范围散射或Kozai-Lidov振荡。
The discovery of a giant planet candidate orbiting the white dwarf WD 1856+534 with an orbital period of 1.4 d poses the questions of how the planet reached its current position. We here reconstruct the evolutionary history of the system assuming common envelope evolution as the main mechanism that brought the planet to its current position. We find that common envelope evolution can explain the present configuration if it was initiated when the host star was on the AGB, the separation of the planet at the onset of mass transfer was in the range 1.69-2.35 au, and if in addition to the orbital energy of the surviving planet either recombination energy stored in the envelope or another source of additional energy contributed to expelling the envelope. We also discuss the evolution of the planet prior to and following common envelope evolution. Finally, we find that if the system formed through common envelope evolution, its total age is in agreement with its membership to the Galactic thin disc. We therefore conclude that common envelope evolution is at least as likely as alternative formation scenarios previously suggested such as planet-planet scattering or Kozai-Lidov oscillations.
