National Tsing Hua University Institutional Repository:ECCENTRIC GRAVITATIONAL INSTABILITIES IN NEARLY KEPLERIAN DISKS
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    NTHUR > Presidents > Shu, Frank Hsia-San (2002-2006 ) > SFHS Conference papers >  ECCENTRIC GRAVITATIONAL INSTABILITIES IN NEARLY KEPLERIAN DISKS


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80909


    Title: ECCENTRIC GRAVITATIONAL INSTABILITIES IN NEARLY KEPLERIAN DISKS
    Authors: ADAMS, FC;RUDEN, SP;SHU, FH
    Teacher: 徐遐生
    Date: 1988
    Publisher: Cambridge University Press
    Relation: CONF ON THE DYNAMICS OF ASTROPHYSICAL DISCS, UNIV MANCHESTER, DEPT ASTRON, MANCHESTER, ENGLAND, DEC 13-16, 1988
    Keywords: ECCENTRIC GRAVITATIONAL INSTABILITIES
    KEPLERIAN DISKS
    Abstract: The growth of global gravitational instabilities in young stellar objects (YSOs) with associated circumstellar disks is studied. The possibility that the accretion ultimately owes its origin to the growth of spiral gravitational instabilities is explored. The results indicate that YSO disks will be unstable to the growth of eccentric distortions which have growth rates comparable to the orbital frequency at the outer edge of the disk. Thus, the distortions grow on nearly a dynamical time scale. Perturbations with m = 1 force the star to move from the center of mass and thereby transfer angular momentum to the stellar orbit. Depending on whether or not an axisymmetric stability parameter Q barrier exists near the corotation radius of the disturbance, this coupling may lead to mass accretion or to the formation of a binary companion from the disk, or both.
    Relation Link: http://www.cambridge.org/home/home/item5655304/?site_locale=zh_TW
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80909
    Appears in Collections:[Shu, Frank Hsia-San (2002-2006 )] SFHS Conference papers
    [Department of Physics] PHYS Conference Papers

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