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The implementation of consistent planetesimal formation in the population synthesis of Exo-Planets

在系外行星的族群合成中实施一致的星子形成

基本信息

批准号：
362567360
负责人：
Professor Dr. H. Hubertus Klahr
金额：
--
依托单位：
Max-Planck-Institut für Astronomie (MPIA)
依托单位国家：
德国
项目类别：
Priority Programmes
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/362567360?language=en
关键词：
implementation consistent planetesimal formation population

项目摘要

The most consistent possibility to test our ideas about the complex phenomenon of planet formation is to study the individual processes in greatest detail, then to parametrise the intermediate results and finally put them in a population synthesis code to run many MonteCarlo instances of planet formation and evolution in a disk. The outcome of these MonteCarlo runs can then be tested against the observational data for Exo-Planets. With this strategy we can test the plausibility of the assumptions we make for the individual processes and readjust our theory accordingly. In its current version the population synthesis uses an ad hoc initial distribution of planetesimals without incorporating our latest understanding of the planetesimal formation process. In this project we will link our models of planetesimal formation and evolution in competition with with pebble accretion to our model for population synthesis of Exo-Planets, removing an important shortcoming from these models. Based on our model of gravoturbulent formation of planetesimals from pebbles we adapt our models of dust evolution in disks with an incorporated recipe to form planetesimals based on the radial pebble flux in the disk to the disk evolution model used in the population synthesis models. Thus we will make the formation models for planets more realistic and at the same time can study the influence of the planetesimal formation efficiency on the predicted outcome of Exo-Planet populations.

要检验我们关于行星形成这一复杂现象的想法，最一致的可能性是最详细地研究各个过程，然后将中间结果参数化，最后将它们放入人口合成代码中，以运行许多行星形成和演化的蒙特卡洛实例。这些蒙特卡洛运行的结果可以根据外行星的观测数据进行测试。有了这个策略，我们就可以检验我们对各个过程所作假设的可验证性，并相应地调整我们的理论。在目前的版本中，人口合成使用了一个特设的初始分布的星子，而没有纳入我们的最新理解的星子形成过程。在这个项目中，我们将把我们的微行星形成和演化模型与卵石吸积竞争与我们的系外行星种群合成模型联系起来，从这些模型中消除一个重要的缺点。基于我们的模型的gravoturbulent形成的星子从卵石，我们适应我们的尘埃演化模型在磁盘与合并的配方，形成星子的基础上，在磁盘上的径向卵石通量的磁盘演化模型中使用的人口合成模型。从而使行星的形成模型更加真实，同时可以研究星子形成效率对系外行星种群预测结果的影响。