干旱区生态环境知识资源中心(Arid): Assessment of the probability of microbial contamination for sample return from Martian moons I: Departure of microbes from Martian surface

Arid

DOI	10.1016/j.lssr.2019.07.009
	Assessment of the probability of microbial contamination for sample return from Martian moons I: Departure of microbes from Martian surface
	Fujita, Kazuhisa; Kurosawa, Kosuke; Genda, Hidenori; Hyodo, Ryuki; Matsuyama, Shingo; Yamagishi, Akihiko; Mikouchi, Takashi; Niihara, Takafumi
通讯作者	Fujita, K (corresponding author), Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan.
会议名称	42nd Scientific Assembly of the Committee-on-Space-Research (COSPAR)
会议日期	JUL 14-22, 2018
会议地点	Pasadena, CA
英文摘要	Potential microbial contamination of Martian moons, Phobos and Deimos, which can be brought about by transportation of Mars ejecta produced by meteoroid impacts on the Martian surface, has been comprehensively assessed in a statistical approach, based on the most probable history of recent major gigantic meteoroid collisions on the Martian surface. This article is the first part of our study to assess potential microbial density in Mars ejecta departing from the Martian atmosphere, as a source of the second part (Kurosawa et al., 2019) where statistical analysis of microbial contamination probability is conducted. Potential microbial density on the Martian surface as the source of microorganisms was estimated by analogy to the terrestrial areas having the similar arid and cold environments, from which a probabilistic function was deduced as the asymptotic limit. Microbial survival rate during hypervelocity meteoroid collisions was estimated by numerical analysis of impact phenomena with and without taking internal friction and plastic deformation of the colliding meteoroid and the target ground into consideration. Trajectory calculations of departing ejecta through the Martian atmosphere were conducted with taking account of aerodynamic deceleration and heating by the aid of computational fluid dynamic analysis. It is found that Mars ejecta smaller than 0.03m in diameter hardly reach the Phobos orbit due to aerodynamic deceleration, or mostly sterilized due to significant aerodynamic heating even though they can reach the Phobos orbit and beyond. Finally, the baseline dataset of microbial density in Mars ejecta departing for Martian moons has been presented for the second part of our study.
英文关键词	Mars Phobos and Deimos Microbe transportation Panspermia Aerodynamic heating Planetary protection
来源出版物	LIFE SCIENCES IN SPACE RESEARCH
ISSN	2214-5524
EISSN	2214-5532
出版年	2019
卷号	23
页码	73-84
出版者	ELSEVIER
类型	Article; Proceedings Paper
语种	英语
开放获取类型	Green Submitted
收录类别	CPCI-S
WOS记录号	WOS:000509561800009
WOS关键词	ATACAMA DESERT ; MARS ; IMPACTS ; PERMAFROST ; BACTERIA ; VALLEY ; POINT ; STATE ; SOILS ; LIFE
WOS类目	Astronomy & Astrophysics ; Biology ; Multidisciplinary Sciences
WOS研究方向	Astronomy & Astrophysics ; Life Sciences & Biomedicine - Other Topics ; Science & Technology - Other Topics
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369952
作者单位	[Fujita, Kazuhisa] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan; [Kurosawa, Kosuke] Chiba Inst Technol, Planetary Explorat Res Ctr, 2-17-1 Tsudanuma, Narashino, Chiba 2750016, Japan; [Genda, Hidenori; Hyodo, Ryuki] Tokyo Inst Technol, Earth Life Sci Inst, Meguro Ku, 2-12-1 Ookayama, Tokyo 1528550, Japan; [Matsuyama, Shingo] Japan Aerosp Explorat Agcy, Aeronaut Technol Directorate, 7-44-1 Jindaijihigashi Machi, Chofu, Tokyo 1828522, Japan; [Yamagishi, Akihiko] Tokyo Univ Pharm & Life Sci, Sch Life Sci, Dept Appl Life Sci, 1432-1 Horinouchi, Hachioji, Tokyo 1920392, Japan; [Mikouchi, Takashi] Univ Tokyo, Univ Museum, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan; [Niihara, Takafumi] Univ Tokyo, Sch Engn, Dept Syst Innovat, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan
推荐引用方式 GB/T 7714	Fujita, Kazuhisa,Kurosawa, Kosuke,Genda, Hidenori,et al. Assessment of the probability of microbial contamination for sample return from Martian moons I: Departure of microbes from Martian surface[C]:ELSEVIER,2019:73-84.