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    National Tsing Hua University Institutional Repository > 歷任校長 > 徐遐生 (2002-2006) > 期刊論文 >  ON THE DENSITY-WAVE THEORY OF GALACTIC SPIRALS .3. COMPARISONS WITH EXTERNAL GALAXIES


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/81037


    Title: ON THE DENSITY-WAVE THEORY OF GALACTIC SPIRALS .3. COMPARISONS WITH EXTERNAL GALAXIES
    Authors: SHU, F.H.;STACHNIK, R.V.;YOST, J.C.
    教師: 徐遐生
    Date: 1971
    Publisher: American Astronomical Society
    Relation: ASTROPHYSICAL JOURNAL, American Astronomical Society, Volume 166, Issue 3, 1971, Pages 465-481
    Keywords: DENSITY-WAVE THEORY
    GALACTIC SPIRALS
    EXTERNAL GALAXIES
    Abstract: We undertake a semiempirical study of the spiral patterns of three model galaxies constructed from the observed rotation curves of M33, M51, and M81. Consistent with the proposal that density waves are initiated in the outer regions of a galaxy, we find a good fit to result for the observed spiral structure if we choose a pattern speed equal to the rotation speed where the distribution of H-II regions is seen to end. The circumferential bands containing the most prominent H-II regions are located in qualitative agreement with a mechanism in which star formation is triggered by spiral galactic shocks. A suggestion is made for M51 for the coexistence of short and long trailing waves traveling with the same pattern speed.
    Relation Link: http://aas.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/81037
    Appears in Collections:[ 徐遐生 (2002-2006)] 期刊論文
    [物理系] 期刊論文

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