Life Origin in the Milky Way Galaxy: II. Scanning for Habitable Stellar Systems on Behalf of Future Space Missions

作     者：Alexander N. Safronov Alexander N. Safronov

作者机构：Obukhov Institute of Atmospheric Physics Russian Academy of Sciences Moscow Russia 

出 版 物：《Journal of High Energy Physics, Gravitation and Cosmology》 (高能物理（英文）)

年 卷 期：2024年第10卷第2期

页      面：681-692页

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

主　　题：Interstellar Mission Stellar Abundance Habitability Hypatia Stellar Catalog DNA-Star 

摘      要：The possibility of the life origin in the stellar systems, located at a distance of ~200 pc from the solar system, was investigated. The stars, in the spectrums of which C (carbon), O (oxygen), N (nitrogen), and P (phosphorus) are found, are called DNA-stars. Based on stellar abundances a new method for searching for habitable exoplanets has been developed and a list of 48 DNA-stars in the solar neighborhood, on which life is possible, has been defined. The quota of DNA-stars is equal 1.3% of the total amount of Hypatia Stellar Catalog. Only three DNA-stars out of selected 48 stars belong to the spectral class as our Sun (G2V). The closest to the solar system is the DNA-star with the number HIP 15510, which belongs to the G8V class and is 6 pc away from the solar system. Nine DNA-stars, which have the highest chemical similarity with solar spectrum, were identified. It is identified that one of these nine stars, HIP 24681, has six planets.