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Towards an understanding of astronomical silicate dust based on mineralogy, meteoritics and infrared spectroscopy

基于矿物学、陨石学和红外光谱学来了解天文硅酸盐尘埃

基本信息

批准号：
ST/S004106/1
负责人：
Janet Bowey
金额：
$ 24.78万
依托单位：
CARDIFF UNIVERSITY
依托单位国家：
英国
项目类别：
Fellowship
财政年份：
2019
资助国家：
英国
起止时间：
2019 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=ST%2FS004106%2F1
关键词：
Towards understanding astronomical silicate dust

项目摘要

Tiny dust grains exist throughout the Universe: from the most distant galaxies, to our own Solar System. These grains cause galaxies to shine at infrared wavelengths. Much of the space dust is made of silicates, with a similar composition to rocks, soil and sand on the Earth and to meteorites which are rocks which fall to Earth from space. Mineralogists and meteoriticists study silicate rocks and meteoritic silicates in great detail, but this knowledge is not often used to interpret astronomical data. I am an astrophysicist who tries to understand dusty regions of space, galaxies, exploding stars, newly-forming stars and comets by comparing data from telescopes with laboratory data; I apply the results to computational models to interpret the physics. Where there is insufficient laboratory data, I work with mineralogists, meteoriticists, chemists and physicists to obtain new data. This project will underpin the interpretation of infrared spectra obtained with the James Webb Space Telescope, and older under-interpreted Spitzer and ISO-telescope data. It will also provide an archive of laboratory data for physical models of the passage of light through dusty space and help other astrophysicists to know the composition and physics of astronomical silicate dust.

微小的尘埃颗粒存在于整个宇宙中：从最遥远的星系，到我们自己的太阳系。这些颗粒使星系发出红外波长的光。大部分太空尘埃由硅酸盐组成，其成分与地球上的岩石、土壤和沙子以及从太空坠落到地球的陨石相似。矿物学家和陨石学家非常详细地研究硅酸盐岩石和陨石硅酸盐，但这些知识并不经常用于解释天文数据。我是一名天体物理学家，试图通过将望远镜数据与实验室数据进行比较来了解太空中的尘埃区域、星系、爆炸的恒星、新形成的恒星和彗星；我将结果应用到计算模型中来解释物理学。当实验室数据不足时，我会与矿物学家、陨石学家、化学家和物理学家合作以获得新数据。该项目将支持对詹姆斯·韦伯太空望远镜获得的红外光谱以及早期未充分解释的斯皮策和ISO望远镜数据的解释。它还将为光穿过尘埃空间的物理模型提供实验室数据档案，并帮助其他天体物理学家了解天文硅酸盐尘埃的成分和物理性质。