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    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80894


    Title: Chaos in spiral galaxies
    Authors: Shu, FH;Chakrabarti, S;Laughlin, G
    教師: 徐遐生
    Date: 2004
    Publisher: Springer Verlag
    Relation: International Conference on Penetrating Bars Through Masks of Cosmic Dust, Pilanesberg Natl Pk, SOUTH AFRICA, JUN 07-12, 2004
    Keywords: DENSITY WAVES
    INTERSTELLAR-MEDIUM
    GALACTIC SHOCKS
    STAR-FORMATION
    DISKS
    RESONANCES
    STABILITY
    ARMS
    AMPLIFICATION
    IMAGES
    Abstract: We review spiral density-wave theory and its realtionship to the disordered appearance of population I objects in some disk galaxies. We discuss mechanisms proposed for the formation of (a) feathers by gravitational instability behind galactic shocks, (b) branches by the action of ultraharmonic resonances, (c) spurs by reflection of leading waves off sharp features induced by nonlinear dredging, and (d) flocculence by the chaos produced from overlapping resonances. We conclude that disorder arises in spiral galaxies not so much from disorderly causes as from too sensitive a response of the interstellar medium to an orderly but nonlinear spiral gravitational field.
    Relation Link: http://adsabs.harvard.edu/abs/2004csg..book.....S
    http://www.springerlink.com/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80894
    Appears in Collections:[ 徐遐生 (2002-2006)] 會議論文
    [物理系] 會議論文

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