Exploring the Diversity of Exoplanets Bulk Densities in multi-parameter space

探索多参数空间中系外行星体积密度的多样性

• 批准号: 446253935
• 负责人: Professor Dr. Artie P. Hatzes
• 金额: --
• 依托单位: Thüringer Landessternwarte Tautenburg (TLS) - Karl-Schwarzschild-Observatorium
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/446253935?language=en
• 关键词: Exploring; Diversity; Exoplanets; Bulk; Densities

This project is proposed by a consortium of three closely working German teams located at DLR Berlin-Adlershof (DLR-EPA), the Thüringer Landessternwarte Tautenburg (TLS) and the Rheinisches Institut für Umweltforschung at the University Cologne in Köln (RIU-PF) who have a considerable experience in transit detection in stellar light curves (RIU, DLR), in radial velocity measurements and interpretation (TLS) and in transit modelling (DLR). Unlike other efforts in the community all of this expertise is maintained in a single working group. This proposal aims at understanding the structures found in the planet densities as a function of several planetary parameters (mass, scaled distance, insolation, etc.), aims at discovering many more planets in the mass range of interest and that it can provide clues as to the formation and evolution of exoplanets and will therefore make a substantial contribution to the fundamental question posed by SPP. This proposal also connects to questions raised during the first phase of SPP from our own observations and research: (i) recompute precisely and consistently the stellar, planetary and orbital properties of planetary systems with measured mass as a base to achieve the objectives; (ii) understand the distribution of the low (3-11 Mearth) and intermediate (11-100 Mearth) mass planets in the mass-density diagram. Can a third parameter (insolation, scaled semi-major axis etc) help to explain the distribution?; (iii) understand from the mass-density diagram and planet detections how the ice planets between low mass planets and giant planets form; (iv) define the boundary between giant planets and Brown Dwarfs considering their properties (mass-density relationship, formation, interiors etc.); (v) Define more precisely the transition mass between Brown Dwarfs and stars from new discoveries; (vi) study ultra-short period planets: survival expectancy under tides, and mass loss by evaporation, shape deformations which may give clues on their formation. The previous funding period enabled us to complete our K2 activities and to focus on the study of TESS transit candidates. During the next funding period we want to proceed with the science exploitation of TESS and CHEOPS light curves. This work will also prepare this consortium and the German community for exoplanet science in the PLATO era.

这个项目是由三个密切合作的德国小组组成的联合体提出的，这三个小组分别位于德国航空航天中心柏林-阿德勒肖夫（DLR-EPA）、图林根-陶滕堡（TLS）和科隆科隆大学的莱茵环境研究所（RIU-PF），他们在恒星光变曲线的凌日探测方面具有相当丰富的经验（RIU，DLR），径向速度测量和解释（TLS）和过境建模（DLR）。与社区中的其他工作不同，所有这些专业知识都由一个工作组维护。这项建议旨在了解行星密度中发现的结构，这些结构是几个行星参数（质量、比例距离、日射等）的函数，它的目标是在感兴趣的质量范围内发现更多的行星，它可以为系外行星的形成和演化提供线索，因此将对SPP提出的基本问题做出重大贡献。这一建议还与SPP第一阶段期间从我们自己的观测和研究中提出的问题有关：（一）以测量的质量为基础，精确和一致地重新计算行星系统的恒星、行星和轨道特性，以实现目标;（二）了解低质量（3-11 Mearth）和中等质量（11-100 Mearth）行星在质量密度图中的分布。第三个参数（日射量、比例半长轴等）能帮助解释这种分布吗？(iii)从质量密度图和行星探测中了解低质量行星和巨行星之间的冰行星是如何形成的;（iv）根据它们的性质（质量密度关系、形成、内部等）定义巨行星和棕矮星之间的边界; (v)（vi）研究超短周期行星：在潮汐下的生存期望，蒸发造成的质量损失，形状变形，这可能会给它们的形成提供线索。上一个资助期使我们能够完成我们的K2活动，并专注于TESS过境候选人的研究。在下一个资助期间，我们希望继续进行TESS和CHEOPS光变曲线的科学开发。这项工作还将为该财团和德国社区在PLATO时代的系外行星科学做好准备。