报告题目：4MOST Galactic pipeline: radial velocity and pysme stellar parameters

报告人：简明杰 博士（Stockholm University,Sweden）

报告摘要：The 4-m Multi-Object Spectroscopic Telescope (4MOST) is one of the ESO community survey with a large field-of-view to survey the southern sky in a few years,delivering spectra for ≥25 million objects over ≥15 000 square degrees in R~6000 and R~20000. 4MOST is currently in its manufacturing,assembly,integration and test phase with an expected start of full science operations within a year. As the date of first light approaches,the pipelines for galactic and extragalactic sources are also in intense developments. I will introduce parts of the recent process for the 4MOST galactic pipeline (4GP):radial velocity and pysme submodule. These module serve as the main part to determine stellar parameters,and although they can be treated as merely finding the best-match template spectra to the observed ones,the implementation to a survey is not so simple. The correct uncertainty estimation requires a homogeneous set of synthetic spectra in 4MOST format,and we are in a transition period from 1D-LTE to NLTE or even 3D-NLTE template. These submodules,together with other ones in 4GP,will help us extract the information of the 4MOST spectra,and a smoother process for the following science cases.

报告时间：2024年7月4日星期四10:00

报告地点：紫台5-516会议室

欢迎大家参加！