Asteroseismology and Exoplanets at Birmingham and Queen Mary

伯明翰和玛丽女王的星震学和系外行星

• 批准号: ST/V000519/1
• 负责人: William Chaplin
• 金额: $ 59.81万
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FV000519%2F1
• 关键词: Asteroseismology; Exoplanets; Birmingham; Queen; Mary

It is a golden era for studies of stars and their exoplanets thanks to new telescope and satellite observations of unprecedented quality and scope. These data are making it possible to investigate large numbers of stars using asteroseismology, the study of stars by observation and analysis of their intrinsic oscillations; and have led to the discovery of thousands of new and diverse exoplanet systems.Our programme of research here involves the asteroseismic exploitation of exquisite photometric data from the NASA TESS and Kepler missions. We will explore the evolution of stellar dynamos and near-surface magnetic activity in cool sub-giants and low-luminosity red giants, testing for example whether interactions of stars with nearby binary companions can affect the action of stellar dynamos. We will also use asteroseismology to age oscillating solar-type and red-giant stars that have very low-mass binary companions, providing key age diagnostics for understanding the evolution of activity in intrinsically faint stars. We will also develop and refine methods for inferring the fundamental properties of stars using asteroseismology. We will use the SPECULOOS telescopes at the Paranal Observatory to search for Earth-sized planets orbiting small stars, and then use JWST we will study the planets' atmospheres to search for signatures of an active biosphere. In parallel, we will characterise a population of planets orbiting stars that peculiar chemical signatures, and establish whether this population is distinct from planets around Sun-like stars.

由于新的望远镜和前所未有的质量和范围的卫星观察，这是对恒星及其系外星星进行研究的黄金时代。这些数据使使用Asterosology，通过观察和分析其内在振荡来研究大量恒星是可能的；并导致发现了数千种新的和多样化的系外行星系统。在这里，我们的研究计划涉及从NASA TESS和Kepler任务中对精美的光度数据进行的小星介剥削。我们将探索恒星迪纳摩和近地面磁性活性在凉爽的子巨头和低亮度红色巨人中的演变，例如测试恒星与附近二进制伴侣的相互作用是否会影响恒星发电机的作用。我们还将使用Asterosology来振荡太阳能型和红色巨型恒星，这些恒星具有非常低的二元伴侣，提供了关键的年龄诊断，以理解本质上微弱的恒星活动的演变。我们还将开发和完善使用星际学学推断恒星基本特性的方法。我们将使用偏an天文台上的投机望远镜来寻找绕着小恒星的地球大小的行星，然后使用JWST，我们将研究行星的气氛来寻找活跃的生物圈的签名。同时，我们将表征绕着奇特化学特征的旋转星星的人群，并确定该种群是否与阳光般的恒星周围的行星不同。

项目成果

Predicting convective blueshift and radial-velocity dispersion due to granulation for FGK stars

预测 FGK 恒星粒化导致的对流蓝移和径向速度色散

• DOI: 10.1093/mnras/stad2393
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Dalal S

Solar-like oscillations and ellipsoidal variations in TESS observations of the binary 12 Boötis

双星 12 Boátis 的 TESS 观测中的类太阳振荡和椭球变化

• DOI: 10.1093/mnras/stac2212
• 发表时间: 2022
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Ball W

Evidence of a Quasiperiodic Global-scale Oscillation in the Near-surface Shear Layer of the Sun

太阳近地表剪切层准周期全球尺度振荡的证据

• DOI: 10.3847/2041-8213/acd93f
• 发表时间: 2023
• 期刊: The Astrophysical Journal Letters
• 作者: Bogart R

Projected spin-orbit alignments from Kepler asteroseismology and Gaia astrometry

开普勒星震学和盖亚天体测量学预测的自旋轨道排列

• DOI: 10.1093/mnrasl/slad012
• 发表时间: 2023
• 期刊: Letters
• 作者: Ball W

Metal epoxy-coated mirrors for stellar seismology

用于恒星地震学的金属环氧树脂涂层镜子

• 发表时间: 1993
• 期刊: Proceedings of SPIE - The International Society for Optical Engineering
• 作者: Bedford D.K.