サガワ ヒデオ   SAGAWA HIDEO
  佐川 英夫
   所属   京都産業大学  理学部 宇宙物理・気象学科
   職種   教授
言語種別 英語
発行・発表の年月 2011/01/01
形態種別 論文集(書籍)内論文
査読 査読あり
標題 New sub-millimeter heterodyne observations of CO and HCN in Titan’s atmosphere with the APEX Swedish heterodyne facility instrument
執筆形態 その他
掲載誌名 Advances in Geosciences: Volume 25: Planetary Science (PS)
出版社・発行元 World Scientific Publishing Co.
巻・号・頁 pp.173-185
著者・共著者 M. Rengel,H. Sagawa,P. Hartogh
概要 The origin of the atmosphere of the largest moon of Saturn, Titan, is poorly understood and its chemistry is rather complicated. Ground-based millimeter/sub-millimeter heterodyne spectroscopy resolves line shapes sufficiently to determine information in Titan’s atmospheric composition (on vertical profiles and isotopic ratios). We test the capabilities of the Swedish Heterodyne Facility Instrument (SHFI), Receiver APEX-1, together with the Atacama Pathfinder EXperiment APEX 12-m telescope for Titan’s atmospheric observations. In particular, we present sub-millimeter observations of the CO(2-1) and HCN(3-2) lines of the Titan stratosphere with APEX, and with SHFI taken during the science verification (SV) instrument phase in March and June 2008. With the help of appropriate radiative transfer calculations, we investigate the possibility to constrain the chemical concentrations and optimize the performance of the APEX-1 instrument for inferring vertical profiles of molecular components of the atmosphere of Titan. This study attempts to contribute to constrain radiative transfer and retrieval algorithms for planetary atmospheres, and to give hints to the current and future ground and space-based data acquisition leading to a more thorough understanding of the chemical composition of Titan.
DOI 10.1142/9789814355377_0013