Title: 系外与河外天体的星冕仪成像/ Coronagraphic imaging of extrasolar and extragalactic objects

Speaker: 任彬

Institute: 欧洲蔚蓝海岸天文台/ Côte d’Azur Observatory

Host: 方陶陶

Time: 11.16 周四 16:30-17:30

Location: 物理楼552

Abstract: 

高对比度成像是研究恒星周边0.1至1角秒的天体的科学。在过去的十年中，利用地基及天基的星冕仪，此领域已获取了近二十个系外行星及褐矮星的图像及光谱，从而直接确认了系外行星的存在。目前工程师及天文学家们正在积极研发新仪器及相应的数据处理算法，并期望在2040年附近获取第一颗类地行星的图像和光谱。本报告将对此领域进行简介，报告内容将包括：系外行星及星周盘的成像及光谱分析，哈勃及韦伯太空望远镜的星冕仪成像，以及哈勃星冕仪的首次对类星体的宿主星系的研究。

High-contrast imaging aims at studying astrophysical objects that are within 0.1 to 1 arcsec from central stars. Using ground- and space-based coronagraphic instruments, the field has directly confirmed the existence for nearly two dozen exoplanets. Engineers and astronomers are developing state-of-the-art instrumentation and data reduction methods, aiming at directly imaging the first Earth-like exoplanet in the 2040s. I will briefly review the field of high-contrast imaging, including but not limited to: exoplanet and circumstellar disk imaging and spectroscopy, coronagraphic imaging with Hubble and James Webb, and our first coronagraphic  imaging the host galaxy of a quasar with Hubble.

Bio：

任彬是厦大物理及数理统计 2013 届本科毕业生，目前是在欧洲蔚蓝海岸天文台工作的玛丽·居里学者。他从美国约翰斯·霍普金斯大学获取了博士学位，随后在加州理工学院进行了博士后研究。他的科研兴趣在于应用数学与天文学的交叉科学，从而对天文学及望远镜的仪器观测模式进行探索。他对哈勃 STIS 星冕仪探索被用于哈勃用户手册中，并一共发表了 50 篇以上的科研论文，其中 15 篇以上是第一及通讯作者。他已与 7 名本科及研究生合作，且与他们发表了 5 篇论文：他指导的本科生均被世界领先的天文学机构录取为博士生（亚利桑那、密歇根、夏威夷）。

Graduated from Xiamen University with a B.Sc. in Physics and a B.Ec. in Mathematical Statistics in 2013, Dr. Bin Ren is currently a Marie S.-Curie Fellow based at the Côte d’Azur Observatory. He obtained his PhD from the Johns Hopkins University, and conducted postdoctoral work in California Institute of Technology. His research focuses on interdisciplinary work between applied math and astronomy, and he works on both astronomical science and telescope instrument observational techniques. His study on the Hubble/STIS coronagraph is included in its instruction manual. With a total of over 50 published research articles, he is the first or corresponding author for over 15 of them. He has published 5 papers with 7 undergraduate and graduate students: all the advisees are the first authors for these papers, among which all the undergrads have been accepted to top global astronomy PhD programs (U Arizona, U Michigan, U Hawaii).