@inproceedings{oai:jaxa.repo.nii.ac.jp:00003049,
 author = {尾中, 敬 and 藤原, 英明 and 石原, 大助 and Onaka, Takashi and Fujiwara, Hideaki and Ishihara, Daisuke},
 book = {宇宙航空研究開発機構特別資料, JAXA Special Publication: Proceedings of the SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe},
 month = {Mar},
 note = {SPICA Science Conference from Exoplanets to Distant Galaxies: SPICA's New Window on the Cool Universe (June 18-21, 2013. Ito Hall, the University of Tokyo), Bunkyou-ku, Tokyo, Japan, Recent space infrared observations with Spitzer and AKARI have discovered excess emission in the mid-infrared around main-sequence stars, which suggests the presence of warm ( greater than 150 K) debris dust. These warm debris objects constitute a new class of debris disks distinct from those found in the far-infrared. A significant fraction of them show too high a fractional luminosity (a ratio of the excess to the stellar flux) to be accounted for by the steady-state collisional cascade model and often show solid features in the mid-infrared, some of which are attributed to silica, species rarely seen in other celestial objects. These facts suggest that they are formed by recent violent events, such as giant impacts or late heavy bombardments, the former of which have a direct link to the formation of terrestrial planets. While a variability of the features is predicted since they must originate in submicron-sized particles that will be blown out in a short time scale by the radiation from the central star, no systematic variation has so far been detected over 20-30 years except for a few cases, suggesting continuous replenishment of debris possibly from outer regions. Observations in the far-infrared are thus indispensable for the understanding of the origin and spatial distribution of the debris in these objects. Unprecedented sensitivities and wide field-of-views of MCS and SAFARI onboard SPICA enable us to make efficient imaging and spectroscopic surveys of warm debris disks from mid- to far-infrared and revolutionizes our understanding of the terrestrial plant formation for the first time. We discuss possible observations of warmdebris disks with SPICA to study the formation process of the warm debris and their relation to the formation of terrestrial planets., 形態: カラー図版あり, Physical characteristics: Original contains color illustrations, 資料番号: AA1730027072, レポート番号: JAXA-SP-17-010E},
 pages = {335--338},
 publisher = {宇宙航空研究開発機構(JAXA), Japan Aerospace Exploration Agency (JAXA)},
 title = {Warm Debris Disks with SPICA},
 volume = {JAXA-SP-17-010E},
 year = {2018}
}