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A Magellan M2FS Spectroscopic Survey of Galaxies at Redshift >= 6
报告题目:A Magellan M2FS Spectroscopic Survey of Galaxies at Redshift >= 6
报 告  人:江林华 教授
报告时间:2019-04-25 15:00:00
报告地点:天文楼212报告厅

报告人:江林华 教授(Kavli Institute for Astronomy and Astrophysics)
  目:A Magellan M2FS Spectroscopic Survey of Galaxies at Redshift >= 6
  间:4月25日下午3点
  点:天文楼212报告厅
  要:High-redshift (z> = 6) star-forming galaxies are a natural tool to study the early galaxy evolution and explore the history of cosmic reionization. In this talk, I will present our recent work on our understanding of these high-redshift galaxies. In particular, I will introduce our on-going program that uses Magellan M2FS to spectroscopically identify a large number of galaxies at 5.5 < z < 6.7 over nearly four square-degrees on the sky. M2FS is a fiber-fed, multi-object (256 fibers) spectrograph on the Magellan Clay telescope. With a large field of view (0.5 degrees in diameter), it is efficient to identify line-emitting galaxies at high redshift. We have observed about three square degrees in a few well-studied deep fields and obtained more than 250 luminous Lyman-alpha emitting galaxies at z = 5.7 and 6.6. This is the largest sample of its kind so far. We are using this unique sample to study a variety of galaxy properties and their implications to cosmic reionization. I will list a few examples of current results, including Lyman-alpha luminosity function, Lyman-alpha emission halos, protoclusters of galaxies, etc.
报告人简介:Linhua Jiang is a Youth Qianren Research Professor at the Kavli Institute for Astronomy and Astrophysics, Peking University. He obtained his B.S. and M.S. degrees from Peking University. In 2008 he obtained his Ph.D. degree from University of Arizona. Before he joined Peking University as a faculty member in 2014, he was a Hubble Fellow at Arizona State University. Professor Jiang has a broad research interests in extragalactic astronomy and observational cosmology, including high-redshift quasars and supermassive black holes, high-redshift galaxies and clusters, their physical properties and implications to cosmic reionization.