English  |  正體中文  |  简体中文  |  Items with full text/Total items : 54367/62174 (87%)
Visitors : 14647864      Online Users : 70
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 > 理學院 > 天文研究所 > 期刊論文 >  The CO molecular outflows of IRAS 16293-2422 probed by the submillimeter array

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/53951

    Title: The CO molecular outflows of IRAS 16293-2422 probed by the submillimeter array
    Authors: Yeh, Sherry C. C.;Hirano, Naomi;Bourke, Tyler L.;Ho, Paul T. P.;Lee, Chin-Fei;Ohashi, Nagayoshi;Takakuwa, Shigehisa
    教師: 賀曾樸
    Date: 2008
    Publisher: American Astronomical Society
    Relation: ASTROPHYSICAL JOURNAL,Volume: 675,Issue: 1,Pages: 454-463,Published: MAR 1 2008
    IRAS 16293-2422
    Abstract: We have mapped the protobinary source IRAS 16293-2422 in CO 2-1, (CO)-C-13 2-1, and CO 3-2 with the Submillimeter Array (SMA). The maps with resolution of 1.5 ''-5 '' reveal a single small-scale (similar to 3000 AU) bipolar molecular outflow along the east-west direction. We found that the blueshifted emission of this small-scale outflow mainly extends to the east and the redshifted emission to the west from the position of IRAS 16293A. A comparison with the morphology of the large-scale outflows previously observed by single-dish telescopes at millimeter wavelengths suggests that the small-scale outflow may be the inner part of the large-scale (similar to 15,000 AU) east-west outflow. On the other hand, there is no clear counterpart of the large-scale northeast-southwest outflow in our SMA maps. Comparing analytical models to the data suggests that the morphology and kinematics of the small-scale outflow can be explained by a wide-angle wind with an inclination angle of similar to 30 degrees-40 degrees with respect to the plane of the sky. The high-resolution CO maps show that there are two compact, bright spots in the blueshifted velocity range. An LVG analysis shows that the one located 1 '' to the east of source A is extremely dense, n(H-2) similar to 10(7) cm(-3), and warm, T-kin > 55 K. The other one located 1 '' southeast of source B has a higher temperature of T-kin > 65 K but slightly lower density of n(H-2) similar to 10(6) cm(-3). It is likely that these bright spots are associated with the hot core-like emission observed toward IRAS 16293. Since both bright spots are blueshifted from the systemic velocity and are offset from the protostellar positions, they are likely formed by shocks.
    URI: http://aas.org/
    Appears in Collections:[天文研究所] 期刊論文

    Files in This Item:

    File Description SizeFormat


    SFX Query


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