报告人：江林华　 教授 （北京大学KIAA）

时间：2015年12月15日下午4：00

地点：东区理化大楼18层天文台报告厅

报告摘要：Star-forming galaxies at redshifts higher than 6 are natural tools to study the early galaxy formation and explore the history of cosmic reionization. In this talk, I will present the physical properties of a large sample of spectroscopically confirmed galaxies at z>=6. The sample consists of nearly 70 Lyman-alpha emitters (LAEs) and Lyman-break galaxies (LBGs). They have extremely deep optical images in a series of broad and narrow bands. They also have deep imaging data in the near-IR and mid-IR from our HST and Spitzer programs. The wealth of the multi-band data and secure redshifts provide great advantages to measure their physical properties. I will first present some basic properties of the rest-frame UV continuum and Lyman-alpha emission, and a structural and morphological study of these galaxies. I will then model the SEDs of these galaxies and derive their stellar populations. I will argue that LAEs and LBGs with strong Lyman-alpha lines are indistinguishable, that LAEs represent a subset of LBGs with strong Lyman-alpha emission.