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2018/12/18(二)13:00綜合大樓1樓48111B教室演講 : 林忠義 博士(中央大學天文研究所)

張貼者:2018年12月11日 下午9:29Dabby Lu   [ Ann-Chen Jang 已於 2018年12月11日 下午9:29 更新 ]
講題:The study of comets from ground-based observations to space missions
摘要:With almost a century of experience and several decade observations using ground‐based and space telescopes monitoring in a wavelength band from the cm‐wave radio astronomy to x‐ray, we are confident that we were able to use such data effectively for studying the most of physical properties and chemical abundance of cometary nuclei. However, the chemical composition of cometary nuclei could be different from comet to comet. For instance, SPCs (short period comets) have been subjected more times to solar radiation than LPCs (long period comets), and they should show a lower content of volatile material and a more highly processed surface. In addition, the investigation of the chemical composition is indirect because it considers only molecules that are released from the nucleus surface that can be affected by numerous processes, for instance cosmic ray. Therefore, how the molecular composition and abundance of the coma is related to the one inside the nucleus is still an open issue. 
In this talk, I will present recent study of comets from the ground-based observations to space mission and show how important to link ROSETTA’s incredible detail results to ground‐based observations. The link and direct comparison between 67P and other comets observed in the same ways from Earth will be discussed. Furthermore, I will discuss the interaction between cometary plasma tail and solar wind using our observing data set.
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Ann-Chen Jang,
2018年12月11日 下午9:29
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