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.

由于新的望远镜和卫星观测的质量和范围前所未有，这是研究恒星及其系外行星的黄金时代。这些数据使得有可能利用星震学研究大量恒星，即通过观察和分析恒星的内在振荡来研究恒星;并导致发现了数千个新的和不同的系外行星系统，我们在这方面的研究方案涉及利用美国航天局TESS和开普勒飞行任务提供的精密光度数据进行星震研究。我们将探索恒星发电机的演化和冷亚巨星和低光度红巨星的近表面磁活动，例如测试恒星与附近的双星同伴的相互作用是否会影响恒星发电机的作用。我们还将使用星震学来老化振荡的太阳型和红巨星，这些恒星具有非常低质量的二元伴星，为了解本质上暗淡的恒星活动的演变提供关键的年龄诊断。我们还将开发和改进利用星震学推断恒星基本特性的方法。我们将使用Paranal天文台的SPECULOOS望远镜来搜索围绕小恒星运行的地球大小的行星，然后使用JWST我们将研究行星的大气层来寻找活跃生物圈的特征。与此同时，我们将研究一群围绕恒星运行的行星，这些行星具有特殊的化学特征，并确定这群行星是否与围绕类太阳恒星运行的行星不同。

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

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.

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