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Support of the Astronomical Research of the Cavendish Astrophysics Group

卡文迪什天体物理学组天文研究的支持

基本信息

批准号：
ST/V000918/1
负责人：
Christopher Haniff
金额：
$ 118.53万
依托单位：
University of Cambridge
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：
已结题

来源：
https://gtr.ukri.org/projects?ref=ST%2FV000918%2F1
关键词：
Support Astronomical Research Cavendish Astrophysics

项目摘要

This proposal requests support for the Cavendish Astrophysics (CA) group in Cambridge. Our research has a strong emphasis on observational astrophysics, backed by fundamental theoretical work, a substantial track-record in Bayesian data analysis, and extensive expertise in technologies that span the spectrum from radio to near-infrared wavelengths. We aim to work in a number of thematic areas where we have contributed significantly either experimentally or via leadership roles, or where we will be developing new technologies for next generation experiments in astrophysics.Theme 1 - Galaxy formation and Evolution: we will exploit our access to new proprietary data from JWST's NIRSpec instrument and the MOONS multi-object spectrograph to investigate the chemical enrichment of galaxies from the time they were formed, at Cosmic Dawn, through to more recent epochs. This will use new measurements ofgalactic metallicities from redshifts 9 through 0.7, and will explore the impact of the galactic environment on the chemical evolution of galaxies and the extent to whichdifferent feedback mechanisms, e.g., accretion from the intergalactic medium, play a role in this process.Theme 3 - Exoplanet discovery: we will build on our expertise in precision radial-velocity measurement to lead the search for Earth-like exoplanets.We will perform the first analysis of data from the Terra Hunting Experiment, a 10-year survey of nearby stars with the HARPS-3 spectrograph at the Isaac Newton Telescope using an in-depth characterisation of the instrument and new statistical techniques to reduce false detections arising from instrumental effects. In a parallel study, we will combine data from the HARPS-N spectrograph with new data from the TESS satellite to fully characterise potential planets around nearby K dwarfs, usingnew methods to remove spurious detections resulting from stellar instabilities which can easily mimic the signatures of low-mass planets.

这项提议要求对剑桥的卡文迪什天体物理学(CA)小组提供支持。我们的研究非常重视观测天体物理学，有基本的理论工作、贝叶斯数据分析方面的大量记录以及从无线电到近红外波长的广泛技术专业知识。我们的目标是在一些专题领域工作，在这些领域，我们已经通过实验或通过领导作用做出了重大贡献，或者我们将为下一代天体物理实验开发新的技术。主题1-星系形成和演化：我们将利用我们从JWST的NIRSpec仪器和卫星多目标光谱仪获得的新的专有数据来研究星系从宇宙黎明形成到最近的新纪元的化学丰度。这将使用从红移9到0.7的新的星系金属度测量，并将探索星系环境对星系化学演化的影响，以及不同的反馈机制，如来自星际介质的吸积，在这一过程中发挥作用的程度。主题3-系外行星发现：我们将利用我们在精确径向速度测量方面的专业知识来领导寻找类地系外行星。我们将对来自Terra Hunting实验的数据进行第一次分析，使用艾萨克·牛顿望远镜的HARPS-3光谱仪对附近恒星进行了为期10年的调查，使用了对该仪器的深入描述和新的统计技术，以减少由于仪器效应而产生的错误探测。在一项平行的研究中，我们将结合来自HARPS-N光谱仪的数据和来自TESS卫星的新数据来全面描述附近K矮星周围的潜在行星，使用新的方法来消除由恒星不稳定性引起的虚假探测，这种不稳定可以很容易地模仿低质量行星的特征。