Multi-star System Observations Based on the Direct-imaging Method |
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| Institution: | 1. National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing 210042, China;2. CAS Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Nanjing 210042, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;4. School of Astronomy and Space Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;1. Beijing Planetarium, Beijing 100044 China;2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101 China;3. Space Debris Observation and Data Application Center, China National Space Administration, Beijing 100101 China;4. Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023 China;5. Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing 100094 China;6. School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049 China;1. College of Mathematics and Physics Science, Hunan University of Arts and Science, Changde 415000, China;2. Center for Astrophysics, Guangzhou University, Guangzhou 510006, China;1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030 China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. National Time Service Center, Chinese Academy of Sciences, Xi’an 710600;2. School of Electronic Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049;3. Key Laboratory of Precise Positioning and Timing Technology, Chinese Academy of Sciences, Xi’an 710600;4. Key Laboratory of Time and Frequency Primary Standards, Chinese Academy of Sciences, Xi’an 710600;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023;2. School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026;3. National Basic Discipline Public Science Data Center, Beijing 100190;1. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023 China;2. National Astronomical Observatory of Japan, Mitaka 181-8511, China |
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| Abstract: | The direct-imaging exploration can obtain comprehensive physical information of exoplanets, which is a key technology to search for extraterrestrial life in the future. In this paper, based on our recent high-contrast imaging data of ground-based telescope, the newly discovered multi-star candidates are presented. In the early stage, combined with the ability of high-contrast imaging equipment for the exoplanets in the ground-based system, we select about 1000 targets from published works which are compiled using the catalogs released by Gaia. These targets are distributed in different young star clusters. Recently, we used Hale Telescope at Palomar Observatory to carry out high-contrast imaging observation on 42 of the above targets in the K-band. Most of the observed targets are 7.5–14 in the V-band. In 2019, after two rounds of observation, we discover six multi-star system candidates. It is however difficult to find out whether these targets are single-star or multi-star systems in Gaia DR2 (Data Release 2) catalog and Gaia EDR3 (early Data Release 3) catalog. |
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