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小郷原 一智 所属 京都産業大学 理学部 宇宙物理・気象学科 職種 准教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2017/07 |
| 形態種別 | 研究論文 |
| 査読 | 査読あり |
| 標題 | Scattering Properties of the Venusian Clouds Observed by the UV Imager on board Akatsuki |
| 執筆形態 | その他 |
| 掲載誌名 | ASTRONOMICAL JOURNAL |
| 出版社・発行元 | IOP PUBLISHING LTD |
| 巻・号・頁 | 154(1),pp.44 |
| 著者・共著者 | Y. J. Lee,A. Yamazaki,T. Imamura,M. Yamada,S. Watanabe,T. M. Sato,K. Ogohara,G. L. Hashimoto,S. Murakami |
| 概要 | We analyze the albedo of Venus obtained from the UV Imager on board Akatsuki. A relative global mean albedo over phase angle is used in this study, and we confirm the glory feature at 283 and 365. nm in the data acquired in 2016 May. We successfully simulate the observation using a radiative transfer model. Our results show that cloud aerosols of r(eff) = 1.26 mu m and v(eff) = 0.076 (mode 2) can explain the glory, consistent with a property of aerosols previously suggested by using the Venus Monitoring Camera on board Venus Express. We find that SO2 and the unknown UV absorber are necessary factors to explain the decreasing trend of the observed relative albedo at phase angles larger than 10(omicron). We suggest a range of possible SO2 abundance from 80 to 400. ppbv at the cloud top level, depending on atmospheric conditions assumed. |
| DOI | 10.3847/1538-3881/aa78a5 |
| ISSN | 0004-6256/1538-3881 |
| Put Code(ORCID) | 52340107 |
| PermalinkURL | http://orcid.org/0000-0001-7666-4442 |