High-contrast coronagraph for ground-based imaging of Jupiter-like planets  

作　　者：Jiang-Pei Dou De-Qing Ren Yong-Tian Zhu 

机构地区：[1]National Astronomical Observatories / Nanjing Institute of Astronomical Optics ＆ Technology, Chinese Academy of Sciences, Nanjing 210042, China [2]Key Laboratory of Astronomical Optics ＆ Technology, Nanjing Institute of Astronomical Optics ＆ Technology, Chinese Academy of Sciences, Nanjing 210042, China [3]Physics ＆ Astronomy Department, California State University Northridge, 18111 Nordhoff Street, Northridge, California 91330-8268

出　　处：《Research in Astronomy and Astrophysics》2010年第2期189-198,共10页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China (NSFC) (Grant No. 10873024)

摘　　要：We propose a high-contrast coronagraph for direct imaging of young Jupiter-like planets orbiting nearby bright stars. The coronagraph employs a step- transmission filter in which the intensity is apodized with a finite number of steps with identical transmission in each step. It should be installed on a large ground-based telescope equipped with a state-of-the-art adaptive optics system. In this case, contrast ratios around 10-6 should be accessible within 0.1 arcsec of the central star. In recent progress, a coronagraph with a circular apodizing filter has been developed, which can be used for a ground-based telescope with a central obstruction and spider structure. It is shown that ground-based direct imaging of Jupiter-like planets is promising with current technology.We propose a high-contrast coronagraph for direct imaging of young Jupiter-like planets orbiting nearby bright stars. The coronagraph employs a step- transmission filter in which the intensity is apodized with a finite number of steps with identical transmission in each step. It should be installed on a large ground-based telescope equipped with a state-of-the-art adaptive optics system. In this case, contrast ratios around 10-6 should be accessible within 0.1 arcsec of the central star. In recent progress, a coronagraph with a circular apodizing filter has been developed, which can be used for a ground-based telescope with a central obstruction and spider structure. It is shown that ground-based direct imaging of Jupiter-like planets is promising with current technology.

关 键 词：instrumentation： high angular resolution- methods： laboratory numer- ical -- techniques： coronagraphy apodization -- planetary systems 

分 类 号：TN141.32[电子电信—物理电子学] TP391.9[自动化与计算机技术—计算机应用技术]