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    A SiO J = 5 → 4 Survey Toward Massive Star Formation Regions

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    Li_2019_ApJ_878_29.pdf
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    Description:
    Final Published Version
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    Author
    Li, Shanghuo
    Wang, Junzhi
    Fang, Min cc
    Zhang, Qizhou
    Li, Fei
    Zhang, Zhi-Yu cc
    Li, Juan
    Zhu, Qingfeng
    Zeng, Shaoshan
    Affiliation
    Univ Arizona, Dept Astron
    Univ Arizona, Steward Observ
    Issue Date
    2019-06-11
    Keywords
    ISM: clouds
    ISM: jets and outflows
    ISM: molecules
    stars: formation
    stars: massive
    submillimeter: ISM
    
    Metadata
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    Publisher
    IOP PUBLISHING LTD
    Citation
    Shanghuo Li et al 2019 ApJ 878 29
    Journal
    ASTROPHYSICAL JOURNAL
    Rights
    Copyright © 2019. The American Astronomical Society. All rights reserved.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We performed a survey in the SiO J = 5 → 4 line toward a sample of 199 Galactic massive star-forming regions at different evolutionary stages with the Submillimeter Telescope (SMT) 10 m and Caltech Submillimeter Observatory (CSO) 10.4 m telescopes. The sample consists of 44 infrared dark clouds (IRDCs), 86 protostellar candidates, and 69 young H ii regions. We detected SiO J = 5 → 4 line emission in 102 sources, with a detection rate of 57%, 37%, and 65% for IRDCs, protostellar candidates, and young H ii regions, respectively. We find both broad line emissions with full widths at zero power >20 km s−1 and narrow line emissions of SiO in objects at various evolutionary stages, likely associated with high-velocity shocks and low-velocity shocks, respectively. The SiO luminosities do not show apparent differences among various evolutionary stages in our sample. We find no correlation between the SiO abundance and the luminosity-to-mass ratio, indicating that the SiO abundance does not vary significantly in regions at different evolutionary stages of star formation.
    ISSN
    0004-637X
    DOI
    10.3847/1538-4357/ab1e4c
    Version
    Final published version
    Sponsors
    National Key R&D Program of China [2017YFA0402704]; Natural Science Foundation of China [11590783]; CfA predoctoral fellowship; Chinese Scholarship Council; National Natural Science Foundation of China [11629302, U1731237]
    ae974a485f413a2113503eed53cd6c53
    10.3847/1538-4357/ab1e4c
    Scopus Count
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    UA Faculty Publications

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