Short- and Long-Period Planets around Evolved Stars

围绕演化恒星的短周期和长周期行星

• 批准号: 446158929
• 负责人: Professor Dr. Andreas Quirrenbach
• 金额: --
• 依托单位: Landessternwarte Königstuhl (LSW)
• 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/446158929?language=en
• 关键词: Short; Long; Period; Planets; around

More than one hundred planets have been identified around giant stars in recent years, and thus the occurrence rate of planets in the period range of 1 to 3 years is reasonably well determined. However, there are only very few planets with periods of the order of weeks or longer than 10 years.We propose to specifically search for planets with short and long periods around giant stars, via radial velocity follow-up of TESS transiting planet candidates around evolved host stars on one side and via continued long-term radial velocity monitoring of systems which show indications for planets with periods of the order of 10 to 30 years on the other side. This will dramatically improve the occurrence rates for this so-far uncharted parameter space, and inform planet population synthesis studies. Furthermore, it will help to address differences in planet formation as a function of stellar mass (since the evolved samples are typically more massive than main-sequence samples), and also provide constraints on the evolution of planetary orbits under the influence of tides and stellar evolution by comparing main-sequence and evolved samples with the help of simulations.

近年来，围绕巨星周围已经确定了一百多个行星，因此，在1至3年的周期范围内的行星发生率是相当确定的。但是，只有很少的行星具有超过10年的数周或超过10年的阶段。我们建议通过径向速度的候选tess tess transitation候选星星周围的tess速度随访，在一个方面，通过一侧持续的长期径向速度监控，该行星的距离为期10年的时间，这是一个持续的阶段，该行星持续长期监控，该行星的持续长期速度是在10年前，该阶段的长期监控是在10年前的时间上，该行星持续的长期监控。这将显着提高这个未知的参数空间的发生率，并为行星种群综合研究提供信息。此外，它将有助于解决行星形成的差异，这是恒星质量的函数（由于进化的样品通常比主要序列样本更大），并且还通过比较潮汐和恒星进化的影响，通过比较临时和进化的样品与sipluse的帮助相比，在行星轨道的演化中提供了限制。