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アキタヤ ヒロシ
秋田谷 洋 所属 千葉工業大学 天文学研究センター 天文学研究センター 職種 上席研究員 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2022/07/11 |
| 形態種別 | 学術雑誌 |
| 標題 | (3200) Phaethon polarimetry in the negative branch: new evidence for the anhydrous nature of the DESTINY+ target asteroid |
| 執筆形態 | 共著 |
| 掲載誌名 | Monthly Notices of the Royal Astronomical Society: Letters |
| 掲載区分 | 国外 |
| 出版社・発行元 | Oxford University Press (OUP) |
| 巻・号・頁 | 516(1),pp.L53-L57 |
| 担当区分 | 責任著者 |
| 国際共著 | 国際共著 |
| 著者・共著者 | Jooyeon Geem, Masateru Ishiguro, Jun Takahashi, Hiroshi Akitaya, Koji S Kawabata, Tatsuya Nakaoka, Ryo Imazawa, Fumiki Mori, Sunho Jin, Yoonsoo P Bach, Hangbin Jo, Daisuke Kuroda, Sunao Hasegawa, Fumi Yoshida, Ko Ishibashi, Tomohiko Sekiguchi, Jin Beniyama, Tomoko Arai, Yuji Ikeda, Yoshiharu Shinnaka, Mikael Granvik, Lauri Siltala, Anlaug A Djupvik, Anni Kasikov, Viktoria Pinter, Emil Knudstrup |
| 概要 | <jats:title>ABSTRACT</jats:title>
<jats:p>We report on the first polarimetric study of (3200) Phaethon, the target of JAXA’s DESTINY+ mission, in the negative branch to ensure its anhydrous nature and to derive an accurate geometric albedo. We conducted observations at low phase angles (Sun-target-observer angle, α = 8.8–32.4°) from 2021 October to 2022 January and found that Phaethon has a minimum polarization degree Pmin = −1.3 ± 0.1 per cent, a polarimetric slope h = 0.22 ± 0.02 per cent deg−1, and an inversion angle α0 = 19.9 ± 0.3°. The derived geometric albedo is pV = 0.11 (in the range of 0.08–0.13). These polarimetric properties are consistent with anhydrous chondrites, contradict hydrous chondrites, and typical cometary nuclei.</jats:p> |
| DOI | 10.1093/mnrasl/slac072 |
| ISSN | 17453925 |
| NAID | 1360298757435073280 |