Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    SPLASH: the Southern Parkes Large-Area Survey in Hydroxyl – first science from the pilot region

    198446_112736_MNRAS-2014-Dawson-1596-6141.pdf (1.798Mb)
    Access Status
    Open access
    Authors
    Dawson, J.
    Walsh, Andrew
    Jones, P.
    Breen, S.
    Cunningham, M.
    Lowe, V.
    Jones, C.
    Purcell, C.
    Caswell, J.
    Carretti, E.
    McClure-Griffiths, N.
    Ellingsen, S.
    Green, J.
    Gómez, J.
    Krishnan, V.
    Dickey, J.
    Imai, H.
    Gibson, S.
    Hennebelle, P.
    Lo, N.
    Hayakawa, T.
    Fukui, Y.
    Mizuno, A.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Dawson, J.R. and Walsh, A.J. and Jones, P.A. and Breen, S.L. and Cunningham, M.R. and Lowe, V. and Jones, C. and Purcell, C. and Caswell, J.L. and Carretti, E. and McClure-Griffiths, N.M and Ellingsen, S.P. and Green, J.A. and Gómez, J.F. and Krishnan, V. and Dickey, J.M. and Imai, H. and Gibson, S.J. and Hennebelle, P. and Lo, N. and Hayakawa, T. and Fukui, Y. and Mizuno, A. 2014. SPLASH: the Southern Parkes Large-Area Survey in Hydroxyl – first science from the pilot region. Monthly Notices of the Royal Astronomical Society. 439 (2): pp. 1596-1614.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1093/mnras/stu032
    ISSN
    0035-8711
    Remarks

    This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society. ©: 2014 The Authors, Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/23538
    Collection
    • Curtin Research Publications
    Abstract

    The Southern Parkes Large-Area Survey in Hydroxyl (SPLASH) is a sensitive, unbiased, and fully sampled survey of the southern Galactic plane and Galactic Centre in all four ground-state transitions of the hydroxyl (OH) radical. The survey provides a deep census of 1612-, 1665-, 1667-, and 1720-MHz OH absorption and emission from the Galactic interstellar medium, and is also an unbiased search for maser sources in these transitions. We present here first results from the SPLASH pilot region, which covers Galactic longitudes 334° to 344° and latitudes ±2?. Diffuse OH is widely detected in all four transitions, with optical depths that are always small (averaged over the Parkes beam), and with departures from local thermodynamic equilibrium common even in the 1665- and 1667-MHz main lines. To a 3σ sensitivity of ~30 mK, we find no evidence of OH envelopes extending beyond the CO-bright regions of molecular cloud complexes, and conclude that the similarity of the OH excitation temperature and the level of the continuum background is at least partly responsible for this. We detect masers and maser candidates in all four transitions, approximately 50 per cent of which are new detections. This implies that SPLASH will produce a substantial increase in the known population of ground-state OH masers in the southern Galactic plane.

    Related items

    Showing items related by title, author, creator and subject.

    • Accurate OH maser positions from the SPLASH pilot region
      Qiao, H.; Walsh, Andrew; Green, J.; Breen, S.; Dawson, J.; Ellingsen, S.; Gómez, J.; Jordan, Christopher; Shen, Z.; Lowe, V.; Jones, P. (2016)
      We report on high spatial resolution observations, using the Australia Telescope Compact Array (ATCA), of ground-state OH masers. These observations were carried out toward 196 pointing centers previously identified in ...
    • Discovery of the new class I methanol maser transition at 23.4 GHz
      Voronkov, M.; Walsh, Andrew; Caswell, J.; Ellingsen, S.; Breen, S.; Longmore, S.; Purcell, C.; Urquhart, J. (2011)
      We report the first detection of a methanol maser in the 101–92 A- transition at 23.4 GHz,discovered during the H2O southern Galactic Plane Survey (HOPS) with the 22-m MopraRadio Telescope. In the region covered by HOPS, ...
    • The H2O Southern Galactic Plane Survey (HOPS) – I. Techniques and H2O maser data
      Walsh, Andrew; Breen, S.; Britton, T.; Brooks, K.; Burton, M.; Cunningham, M.; Green, J.; Harvey-Smith, L.; Hindson, L.; Hoare, M.; Indermuehle, B.; Jones, P.; Lo, N.; Longmore, S.; Lowe, V.; Phillips, C.; Purcell, C.; Thompson, M.; Urquhart, J.; Voronkov, M.; White, G.; Whiting, M. (2011)
      We present first results of the H2O Southern Galactic Plane Survey (HOPS), using the MopraRadio Telescope with a broad-band backend and a beam size of about 2 arcmin. We haveobserved 100 deg2 of the southern Galactic plane ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.