主讲人单位 (Speaker's Institute): 上海天文台

邀请人 (Invited by): 马波 黄志琦

时间 (Time): 星期二,2022/06/07-16:30 to 17:30

地点 (Location): 腾讯会议/珠海校区天琴中心3416会议室

摘要 (Abstract): 

ALMA has been in operation for years and produced numerous discoveries, thanks to its capabilities of high angular resolution, high sensitivity, and large bandwidth. These capabilities are especially important for studies of Galactic star formation, where we need to spatially resolve star forming regions to detect physical and chemical conditions in faint sources that may give birth to stars and planets. In this talk, I will introduce our recent work as well as future plans to make use of ALMA's most formidable power, to explore details of star formation around the Galactic Center, using data from my top-ranked PI proposals and many other collaborative projects. These include tomography of a molecular cloud using molecular lines at four different wavelengths from Band 3 (90 GHz) to Band 8 (460 GHz); high dynamic range spectral line imaging of filamentary structures in molecular clouds; mapping of magnetic fields in dense cores using polarization observations; and the discovery of a Keplerian protostellar disk with flyby-induced spirals by using long-baseline data.

主讲人简介 (Speaker's CV): 

Xing Lu is an associated researcher at Shanghai Astronomical Observatory. His research focusses on observations of star formation in massive molecular clouds in the Galaxy, by using interferometers such as ALMA, SMA, and JVLA. He obtained a PhD degree in astrophysics in 2016 at Nanjing University. He also visited Harvard-Smithsonian Center for Astrophysics as an SMA predoctoral fellow in 2012-2015. In 2016-2021, he worked in the ALMA Project of National Astronomical Observatory of Japan as an ALMA project research fellow, and participated in on-site observations, science goal projections, and proposal reviews of ALMA.