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タイトル: | Detection of an extremely large impact flash on Jupiter by high-cadence multiwavelength observations |
著者: | Arimatsu, Ko https://orcid.org/0000-0003-1260-9502 (unconfirmed) Tsumura, Kohji Usui, Fumihiko Watanabe, Jun-ichi |
著者名の別形: | 有松, 亘 津村, 耕司 臼井, 文彦 渡部, 潤一 |
キーワード: | Jupiter Impact phenomena Time domain astronomy Planetary atmospheres Solar system astronomy |
発行日: | 1-Jul-2022 |
出版者: | American Astronomical Society |
誌名: | The Astrophysical Journal Letters |
巻: | 933 |
号: | 1 |
論文番号: | L5 |
抄録: | We report the detection of an optical impact flash on Jupiter on 2021 October 15 by a dedicated telescope, Planetary ObservatioN Camera for Optical Transient Surveys, for the first time. Our temporally resolved three-band observations of the flash allowed investigations of its optical energy without the need for approximations on the impact brightness temperature. The kinetic energy of the impactor was equivalent to approximately two megatons of TNT, an order of magnitude greater than that of previously detected flashes on Jupiter and comparable with the Tunguska impact on Earth in 1908. This detection indicates that Tunguska-like impact events on Jupiter occur approximately once per year, two to three orders of magnitude more frequently than terrestrial impacts. The observed flash displayed a single-temperature blackbody spectrum with an effective temperature of approximately 8300 K without clear temporal variation, possibly representing common radiative features of terrestrial Tunguska-class superbolides. |
記述: | 木星で超大型の衝突閃光現象を発見 --京大のとある屋上の小さな望遠鏡による大発見--. 京都大学プレスリリース. 2022-09-13. |
著作権等: | © 2022. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. |
URI: | http://hdl.handle.net/2433/276263 |
DOI(出版社版): | 10.3847/2041-8213/ac7573 |
関連リンク: | https://www.kyoto-u.ac.jp/ja/research-news/2022-09-13 |
出現コレクション: | 学術雑誌掲載論文等 |
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