Design of a compact Near-Infrared spectrometer payload for a Low Earth-Orbit (LEO) Exo-planet spectroscopy satellite.

点击翻译按钮获取中文摘要

There are in excess of a thousand confirmed planets to have been detected outside of our solar system. The majority of these have been detected with one of two techniques (radial velocity and photometric transit). These methods of detection allow the recovery of a few basic parameters of the system but do not allow to infer what the chemical composition and basic constituents of the planet are. Most planned satellite missions in the exo-planetary field are committed to increase the number of such detected systems by ten-fold as well as searching for smaller (more distant from the parent-star) planets in an effort to establish how common Earth-like systems are. Spectroscopy of exoplanets remains however a data-starved field due to the lack of dedicated missions which require spectroscopy to be performed in the Near-IR (1-5 microns to hunt for most molecular signatures) in a sufficiently stable environment without contamination from the Earth's atmospheric variability.For this reason two studies are underway (an ESA M-class proposal and a national small Low Earth Orbit concept) to define the requirements and design in detail a small instrument which could be flown in the early JWST era dedicated to such science case.The project would (depending on the interest of the student and his capabilities) entail (and is not restrictive to) a number of the following activities:Definition of instrument parameters for evaluation of design trade-offBuild of simulation tools to predicted the behaviour of specific hardwareOptical/thermal modelling of instrumentDesign of the Fine-Guidance System of the payload with AOCS loopand depending on the outcome of recent proposed missions be prepared to take part in relevant hardware testing activities.