Meteoroid Clusters in Leonids: Evidence of Fragmentation in Space

Publications of the Astronomical Society of Japan

Hasegawa, Hitoshi³  Fuse, Tetsuharu⁵  Abe, Shinsuke¹  Hashimoto, Takema⁶  Tabe, Isshi²  Yoshikawa, Makoto¹  Watanabe, Jun-ichi⁴  Suzuki, Bunji⁷ 

[1] The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510 ,;Libra Co. Ltd., 4-5-9 Chuohrinkan, Yamato, Kanagawa 242-0007;ASTEC, Inc., 1-3-11 Koishikawa, Bunkyo-ku, Tokyo 112-0002;National Astronomical Observatory of Japan, Mitaka, Tokyo 181-8588;Subaru Telescope, National Astronomical Observatory of Japan, 650 North A’ohoku Place, Hilo, HI 96720, U.S.A.;Nippon Meteor Society, 1-28-1 Kinugaoka, Hachioji, Tokyo 192-0912;Misato Tech. HS, 3-325 Hikonari, Misato, Saitama 341-0003

关键词: "interplanetary medium";    meteoroids;    meteors;    "meteor showers: individual (Leonids)";    "solar system";   

DOI  :  10.1093/pasj/55.3.L23

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

Threeshort-duration“outbursts”,inwhichmorethan20–40meteorsappearedinafewseconds,havebeenreportedduringarecentLeonidstorm.Themeteorsintheseeventswereextremelylocalizedwithinafewhundredkm,whichshouldbecausedbyclustersofmeteoroids.Theexistenceofsuchclustersindicatesthefragmentationofmeteoroidsduringorbitalmotionininterplanetaryspace.Consideringtheextentofthespatialdistribution,thefragmentationshouldhaveoccurredataroundtheperihelionpassageofthemeteoroidsjustbeforeencounteringtheEarth.Thismaycauseapossibleenhancementofsmallermeteoroids,eveninolddusttrails.ApossibleexampleofsimilarclustersinthepastmeteorstormofGiacobinidsisalsonoted.

【 授权许可】

Unknown