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.

该提案请求剑桥卡文迪什天体物理学 (CA) 小组的支持。我们的研究重点是观测天体物理学，并以基础理论工作、贝叶斯数据分析方面的大量记录以及涵盖从无线电到近红外波长的光谱的广泛技术专业知识为支持。我们的目标是在许多主题领域开展工作，在这些主题领域，我们通过实验或通过领导角色做出了重大贡献，或者我们将为下一代天体物理学实验开发新技术。主题 1 - 星系形成和演化：我们将利用我们的机会来自 JWST 的 NIRSpec 仪器和 MOONS 多目标摄谱仪的新专有数据，用于研究星系从宇宙黎明形成时到最近的化学富集情况纪元。这将使用从红移 9 到 0.7 的星系金属丰度的新测量，并将探索星系环境对星系化学演化的影响以及不同反馈机制（例如，星系间介质的吸积）在此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密径向速度测量方面的专业知识来领导类地系外行星的搜索。我们将执行第一个分析来自 Terra Hunting Experiment 的数据，该实验是使用艾萨克·牛顿望远镜的 HARPS-3 摄谱仪对附近恒星进行的为期 10 年的调查，使用仪器的深入表征和新的统计技术来减少仪器效应引起的错误检测。在一项并行研究中，我们将把来自 HARPS-N 摄谱仪的数据与来自 TESS 卫星的新数据结合起来，以充分描述附近 K 矮星周围潜在行星的特征，使用新方法消除由恒星不稳定性引起的虚假检测，这些不稳定性可以很容易地模仿低矮行星的特征。 -质量行星。