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    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/53959


    Title: INTERSTELLAR AMMONIA
    Authors: HO PTP;TOWNES CH
    教師: 賀曾樸
    Date: 1983
    Publisher: ANNUAL REVIEWS INC
    Relation: ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS,Volume: 21,Pages: 239-270,Published: 1983
    Keywords: ASTRONOMICAL MAPS
    INTERSTELLAR GAS
    MOLECULAR EXCITATION
    REACTION KINETICS
    Abstract: Investigations and results on interstellar NH3 are discussed. The physics of the molecule, its interstellar excitation, and its formation and dissociation mechanisms are reviewed. The observing techniques and instruments, including single-antenna facilities, infrared and submillimeter techniques, and interferometric studies using the Very Large Array are briefly considered. Spectral data analysis is discussed, including the derivation of optical depths, excitation measurements, ortho-para measurements, and cross sections. Progress achieved in understanding the properties and evolution of the interstellar medium through NH3 studies is reviewed, including observations of nearby dark clouds and of clumping effects in molecular clouds, as well as interferometric observations of hot molecular cores in Orion, W51, and Sagittarius A. Research results on extragalactic NH3, far-infrared, submillimeter, and midinfrared NH3 observations are described.
    URI: http://www.annualreviews.org/
    http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/53959
    Appears in Collections:[天文研究所] 期刊論文

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