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  • 02월 23일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Molecules, Atoms, Radicals, Ions, and Dimers in the Atmospheres of Planets and Comets

2009년 2월 17일 14시 56분 47초
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목 15시 : 20분
물리화학 - Astrochemistry
저자 및
경희대학교 우주과학전공, Korea
Spectroscopic observations of planets and comets from Earth-based and spaceborne observatories during the last 3 decades have produced a long list of molecules, atoms, radicals, ions, and dimers. The formation of these gas-phase constituents in solar system environment has fascinated planetary astronomers for many years. Nevertheless, important questions, such as, "How do these molecules arise, and what are spectroscopic processes?" remain unanswered or contentious. In searching for answers to the questions, planetary astronomers need helps from chemists to obtain crucial information relevant to the chemistry of our solar system, of which environment is very different from chemistry labs. The detections of these constituents are chronologically presented. Spectroscopic studies on the auroral and thermal emissions and airglows of the giant planets are reviewed and spectroscopic observations of dimers in the atmospheres of the giant planets and Titan are briefly summarized. The recent detections of new molecular emissions and absorptions in the spectra of the giant planets, Titan, and recent bright comets from spaceborne or ground-based observatories are also highlighted. Current thoughts and theories on how to understand spectroscopically obtained molecular abundances and isotopic ratios in the atmospheres are also reviewed in terms of the origin and evolution of the solar system.