论文标题
盖亚可以在白矮人周围找到行星吗？
Can Gaia find planets around white dwarfs?
论文作者
论文摘要
盖亚航天器为揭示长期（> 1 \，au）的跨H-R图中的恒星（包括白矮人）的恒星揭示长期（> 1 \，au）的人口的前所未有的机会。白色矮人行星系统在行星构图的研究中发挥了重要作用，从其在其大气中提供散装元素丰度的独特能力。然而，对白矮人周围的行星人口知之甚少。本文预测，盖亚（Gaia）将在围绕白色矮人周围检测到的行星种群，这些行星是从已知的行星旋转主要序列恒星演变而来的。我们预测，盖亚（Gaia）将检测到白色矮人周围的$ 8 \ pm2 $行星：$ 8 \ pm \，3 \％$将位于3 \，au和$ 40 \ pm10 \，\％$的内部，而不是木星。随着幸存的行星可能会与外部系统动态脱离，因此那些带有Gaia检测到的行星的白色矮人可能在其大气中没有行星材料。预测的行星种群与盖亚发现的比较将揭示动力不稳定性和行星散射的重要性，以及在其巨型分支演化期间光蒸发是否消除了气体巨人的信封。
The Gaia spacecraft presents an unprecedented opportunity to reveal the population of long period (a>1\,au) exoplanets orbiting stars across the H-R diagram, including white dwarfs. White dwarf planetary systems have played an important role in the study of planetary compositions, from their unique ability to provide bulk elemental abundances of planetary material in their atmospheres. Yet, very little is known about the population of planets around white dwarfs. This paper predicts the population of planets that Gaia will detect around white dwarfs, evolved from known planets orbiting main-sequence stars. We predict that Gaia will detect $8\pm2$ planets around white dwarfs: $8\pm\,3\%$ will lie inside 3\,au and $40\pm10\,\%$ will be less massive than Jupiter. As surviving planets likely become dynamically detached from their outer systems, those white dwarfs with Gaia detected planets may not have planetary material in their atmospheres. Comparison between the predicted planet population and that found by Gaia will reveal the importance of dynamical instabilities and scattering of planets after the main-sequence, as well as whether photoevaporation removes the envelopes of gas giants during their giant branch evolution.
