Planets around evolved binary systems

演化双星系统周围的行星

• 批准号: 400397976
• 负责人: Professor Dr. Robi Stefan Banerjee
• 金额: --
• 依托单位: Hamburger Sternwarte
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/400397976?language=en
• 关键词: Planets; around; evolved; binary; systems

From the more than 3000 observed white dwarf plus main-sequence (WDMS) systems, by now more than 200 post common envelope binaries (PCEBs) are known. Such post-common-envelope binaries (PCEBs) are not only exciting objects by themselves but could also harbour planets around them. To date, a handfull of PCEB systems have provided evidence for the presence of planets, despite their violent dynamical evolution. Currently, the most studied and hence most certain case is NN Ser, whose eclipse-timing variations can be explained by the presence of a planetary system consisting of two massive Jovian planets with roughly 7 and 2 MJup, orbiting their hosting binary at distances of 3 and 5 AU, respectively. Yet it is unclear how those planets are formed. In principle, such planets orbiting PCEBs can either form together with the binary, i.e. as first generation (FG) planets, or can be formed after the CE phase, as second generation (SG) planets. Here we will study both scenarios with three dimensional hydrodynamical simulations including N-body interaction.

从3000多个观察到的白矮人加上主序（WDM）系统中，到现在为止200多个普通信封后二进制文件（PCEB）。这样的后常见后二进制文件（PCEB）不仅是令人兴奋的物体，而且还可以藏在它们周围的行星。迄今为止，尽管有剧烈的动力发展，但少数PCEB系统已经为存在行星提供了证据。目前，研究最多，因此最确定的情况是NN Ser，可以通过由两个大约7和2 MJUP组成的行星系统的存在来解释其Eclipse-tim-Timpient-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-tim-timpiettim-tim-tim-tim-the的变化。和5 au。然而，目前尚不清楚这些行星是如何形成的。原则上，旋转PCEB的行星可以与二进制形成，即作为第一代行星，或者可以在CE阶段之后形成，作为第二代（SG）行星。在这里，我们将使用三维流体动力学模拟（包括N体相互作用）研究两个方案。