JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
AA1730026013.pdf789.95 kB
titleDebris Disks and the Zodiacal Light: from AKARI to SPICA
Author(jpn)石原, 大助; 金田, 英宏; 深川, 美里; 高羽, 幸; 小林, 浩; 藤原, 英明; 大坪, 貴文; Pyo, Jeonghyun; 樋口, あや; 尾中, 敬
Author(eng)Ishihara, Daisuke; Kaneda, Hidehiro; Fukagawa, Misato; Takaba, Sachi; Kobayashi, Hiroshi; Fujiwara, Hideaki; Otsubo, Takafumi; Pyo, Jeonghyun; Higuchi, Aya; Onaka, Takashi
Author Affiliation(jpn)名古屋大学; 名古屋大学; 名古屋大学; 名古屋大学; 名古屋大学; 国立天文台ハワイ観測所; 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS); Korea Astronomy and Space Science Institute; 理化学研究所 (RIKEN); 東京大学
Author Affiliation(eng)Nagoya University; Nagoya University; Nagoya University; Nagoya University; Nagoya University; Subaru Telescope, National Astronomical Observatory of Japan; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS); Korea Astronomy and Space Science Institute; The Institute of Physical and Chemical Research (RIKEN); The University of Tokyo
Issue Date2018-03-09
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA Special Publication: The Cosmic Wheel and the Legacy of the AKARI archive: from galaxies and stars to planets and life
Start page97
End page100
Publication date2018-03-09
AbstractFor 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.
DescriptionMeeting Information: 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
Physical characteristics: Original contains color illustrations
会議情報: 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
形態: カラー図版あり
KeywordsSolar system and planetary formation; zodiacal dust; protoplanetary disks
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryAstronomy
Report NoJAXA-SP-17-009E

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.