English  |  正體中文  |  简体中文  |  Items with full text/Total items : 54367/62174 (87%)
Visitors : 13541815      Online Users : 46
RC Version 6.0 © Powered By DSPACE, MIT. Enhanced by NTHU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    National Tsing Hua University Institutional Repository > 歷任校長 > 徐遐生 (2002-2006) > 會議論文 >  A quantitative model for bipolar molecular outflows


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80903


    Title: A quantitative model for bipolar molecular outflows
    Authors: Li, ZY;Shu, FH
    教師: 徐遐生
    Date: 1996
    Publisher: Astronomical Society of the Pacific
    Relation: IAU Colloquium 163 on Accretion Phenomena and Related Outflows, PORT DOUGLAS, AUSTRALIA, JUL 15-19, 1996
    Keywords: bipolar molecular outflows
    Abstract: Since their first discovery in 1980, nearly 200 bipolar molecular outflows have now been observed. These outflows appear to be a ubiquitous phenomenon in the star formation process, although their origin remains unclear. Here, we adopt the thin-shell model of Shu, Ruden, Lada, & Lizano (1991, ApJL, 370, 31) in which bipolar molecular outflows are the swept-up ambient material by powerful winds from central young stellar objects. Besides explaining many observed features of bipolar sources, such as shape, velocity, and the typical extent, this model also naturally accounts for the so-called “Hubble law” of velocity field. However, it was criticized by Masson & Chernin (1992, ApJ, 387, L47) on the ground that much less mass is observed at the high velocity end of some bipolar outflows than expected from this thin-shell model, unless the wind and/or the ambient medium are extremely anisotropic. We show that the extreme anisotropy is in fact inevitable both in the wind and in the ambient medium, because of the presence of dynamically important magnetic fields.
    Relation Link: http://adsabs.harvard.edu/abs/1997ASPC..121..757L
    http://www.astrosociety.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80903
    Appears in Collections:[ 徐遐生 (2002-2006)] 會議論文
    [物理系] 會議論文

    Files in This Item:

    File SizeFormat
    index.html0KbHTML928View/Open


    在NTHUR中所有的資料項目都受到原著作權保護,僅提供學術研究及教育使用,敬請尊重著作權人之權益。若須利用於商業或營利,請先取得著作權人授權。
    若發現本網站收錄之內容有侵害著作權人權益之情事,請權利人通知本網站管理者(smluo@lib.nthu.edu.tw),管理者將立即採取移除該內容等補救措施。

    SFX Query

    與系統管理員聯絡

    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback