Investigating galaxy formation and evolution at sub-millemetre to millimetre wavelengths with Herschel and Muscat

与赫歇尔和马斯喀特一起研究亚毫米到毫米波长的星系形成和演化

• 批准号: 1938557
• 金额: --
• 依托单位: CARDIFF UNIVERSITY
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1938557
• 关键词: Investigating; galaxy; formation; evolution; sub

Observations carried out at far-infrared to sub-millimetre/millimetre wavelengths are of paramount importance to understand the formation and evolution of galaxies. In fact, most of the star formation activity in the universe occurred during a dust-obscured phase, in which the UV/optical light from newly born stars was absorbed by dust and re-emitted at far-IR/sub-mm/mm wavelengths.Recently, the Herschel Space Observatory has explored the universe at those wavelengths with unprecedented sensitivity and resolution, providing a catalogue of hundreds of thousands of dust-obscured galaxies to be used for detailed statistical studies. By leading the widest-area extragalactic survey ever conducted with Herschel, i.e. the Herschel-ATLAS, the Cardiff University is at the forefront in the analysis and scientific exploitation of this large sample of dust-obscured galaxies. Furthermore, a new large format millimetre camera, the Mexico-UK Sub-millimetre Camera for Astronomy (MUSCAT), is currently under construction here in Cardiff and, once installed on the Large Millimetre Telescope (LMT) in Mexico in early 2018, it will carry out observations of some of the extragalactic fields covered by Herschel-ATLAS, thus providing new higher resolution data at millimetre wavelengths.The student will take part in the scientific exploitation of the Herschel-ATLAS and MUSCAT data. He will develop a physical model to interpret the measured statistical properties of dust-obscured galaxies by solving the basic equations for the evolution of the gas within dark matter halos identified in N-body simulations and implementing realistic spectral energy distributions to convert the output of the equations into observables, eg flux densities. The student will also work on the final stages of the characterisation of MUSCAT before it is installed on the LMT. Once the camera is installed, he will assist in the commissioning of MUSCAT and readying the instrument for astronomical observations. He will then help with the data taking/analysis.

以远红外向亚毫米/毫米/毫米波长进行的观测对于了解星系的形成和演变至关重要。实际上，宇宙中的大多数恒星形成活动发生在一个尘埃刺激的阶段，其中新出生的恒星的紫外线/光学光被灰尘吸收并在Far-ir/sub-mm/mm波长处重新发射。通过领导与赫歇尔（Herschel）进行的最广泛的地区外恋调查，即赫歇尔 - 阿特拉斯（Herschel-Atlas），加的夫大学在分析和科学剥削中对这一大型尘埃刺激星系的分析和科学开发处于最前沿。此外，这是一种新的大格式毫米相机，墨西哥-UK亚毫米计摄像机（MUSCAT）目前正在加的夫举行，曾经在2018年初安装在墨西哥的大毫米望远镜（LMT）上对Herschel-Atlas涵盖的一些外层次领域进行观察，从而在毫米波长下提供了新的高分辨率数据。他将开发一个物理模型，以解释尘埃刺激星系的测得的统计特性，通过求解在N体模拟中鉴定出的暗物质Halos中气体演化的基本方程式，并实施逼真的光谱能量分布以转换方程成可观测值，例如通量密度。在安装在LMT上之前，学生还将在Muscat的表征的最后阶段工作。安装了相机后，他将协助摩球并准备好仪器进行天文观测。然后，他将帮助进行数据获取/分析。