@inproceedings{oai:jaxa.repo.nii.ac.jp:00003087, author = {石原, 大助 and 金田, 英宏 and 深川, 美里 and 高羽, 幸 and 小林, 浩 and 藤原, 英明 and 大坪, 貴文 and Pyo, Jeonghyun and 樋口, あや and 尾中, 敬 and Ishihara, Daisuke and Kaneda, Hidehiro and Fukagawa, Misato and Takaba, Sachi and Kobayashi, Hiroshi and Fujiwara, Hideaki and Otsubo, Takafumi and Pyo, Jeonghyun and Higuchi, Aya and Onaka, Takashi}, book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life}, month = {Mar}, note = {第4回「あかり」国際会議 (2017年10月17-20日. 東京大学), 文京区, 東京, The 4th AKARI International Conference: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life (October 17-20, 2017. The University of Tokyo), Bunkyo-ku, Tokyo, Japan, For the studies of the late stages of the planetary-system formation, the dust-supply and trapping processes observed in exosolar debris disks and the zodiacal dust cloud of our solar system are important clues. The debris-disk sample explored by AKARI includes 24 objects whose AKARI (2006-2007) and WISE (2009-2010) fluxes cannot be explained by the same blackbody radiation and suggests temporal variation in 2-4 years. Through the follow-up lambda 8-13 micrometers spectroscopy of them using Subaru/COMICS in 2015-2017, two of them turn out to be mysterious objects; although they have a large amount of small grains whose dissipation timescales are shorter than the observation intervals, most of the grains have been kept during the observed epochs. They cannot be simply explained by neither the conventional steady-state collisional cascade process nor transient events such as Giant Impact with rapid dust dissipation. Through the analyses of the AKARI mid-IR all-sky survey data, various non-steady dust-supply and trapping processes are indicated for the zodiacal dust cloud: temporal variation of the dust component trapped in the Earth's resonant orbits, catastrophic events in the dust-bands formation, and transportation of small grains by a coronal mass ejection, etc. We should carefully investigate the processes in the exosolar debris disks referring the phenomena in our zodiacal dust cloud and extend discussions to the statistical studies of the zodiacal dust cloud analogous by SPICA., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1730026013, レポート番号: JAXA-SP-17-009E}, pages = {97--100}, publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)}, title = {Debris Disks and the Zodiacal Light: from AKARI to SPICA}, volume = {JAXA-SP-17-009E}, year = {2018} }