Support of the Astronomical Research of the Cavendish Astrophysics Group

这个提议请求剑桥卡文迪什天体物理学（CA）小组的支持。我们的研究非常强调观测天体物理学，以基础理论工作为基础，在贝叶斯数据分析方面有大量的跟踪记录，以及在从无线电到近红外波长的频谱技术方面的广泛专业知识。我们的目标是在一些主题领域开展工作，在这些领域，我们通过实验或领导作用做出了重大贡献，或者我们将为下一代天体物理学实验开发新技术。主题1 -星系的形成和演化：我们将利用来自JWST的NIRSpec仪器和MOONS多目标光谱仪的新专有数据来研究星系从宇宙黎明形成到最近时期的化学富集。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）在这一过程中发挥作用的程度。主题3 -系外行星的发现：我们将利用我们在精密径向速度测量方面的专业知识，领导寻找类地系外行星。我们将对Terra Hunting实验的数据进行首次分析。Terra Hunting实验是一项为期10年的研究，使用艾萨克·牛顿望远镜上的HARPS-3光谱仪对附近的恒星进行调查，使用仪器的深入特征和新的统计技术来减少仪器效应引起的错误检测。在一项平行研究中，我们将把HARPS-N光谱仪的数据与TESS卫星的新数据结合起来，充分表征附近K矮星周围的潜在行星，使用新的方法去除由恒星不稳定导致的虚假探测，这些不稳定可以很容易地模仿低质量行星的特征。

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.