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    A survey for hydroxyl in the THOR pilot region around W43

    235391_235391.pdf (4.907Mb)
    Access Status
    Open access
    Authors
    Walsh, Andrew
    Beuther, H.
    Bihr, S.
    Johnston, K.
    Dawson, J.
    Ott, J.
    Longmore, S.
    Luong, Q.
    Klessen, R.
    Ragan, S.
    McClure-Griffiths, N.
    Brunthaler, A.
    Urquhart, J.
    Menten, K.
    Bigiel, F.
    Wyrowski, F.
    Rugel, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Walsh, A. and Beuther, H. and Bihr, S. and Johnston, K. and Dawson, J. and Ott, J. and Longmore, S. et al. 2015. A survey for hydroxyl in the THOR pilot region around W43. Monthly Notices of the Royal Astronomical Society. 455 (3): pp. 3494-3510.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stv2446
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    This article has been accepted for publication in Monthly Notices of The Royal Astronomical Society, © 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/45920
    Collection
    • Curtin Research Publications
    Abstract

    We report on observations of the hydroxyl radical (OH) within The Hι, OH, Recombination line survey (THOR) pilot region. The region is bounded approximately between Galactic coordinates l = 29 .2 to 31 .5 and b = −1 .0 to +1 .0 and includes the high-mass star-forming region W43. We identify 103 maser sites, including 72 with 1612 MHz masers, 42 showing masers in either of the main-line transitions at 1665 and 1667 MHz and four showing 1720 MHz masers. Most maser sites with either main-line or 1720 MHz emission are associated with star formation, whereas most of the 1612 MHz masers are associated with evolved stars. We find that nearly all of the main-line maser sites are co-spatial with an infrared source, detected by GLIMPSE. We also find diffuse OH emission, as well as OH in absorption towards selected unresolved or partially resolved sites. Extended OH absorption is found towards the well-known star-forming complex W43 Main.

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