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

    The H2O Southern Galactic Plane Survey: NH3 (1,1) and (2,2) catalogues

    Access Status
    Fulltext not available
    Authors
    Purcell, C.
    Longmore, S.
    Walsh, Andrew
    Whiting, M.
    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.
    Lowe, V.
    Phillips, C.
    Thompson, M.
    Urquhart, J.
    Voronkov, M.
    White, G.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Purcell, C. and Longmore, S. and Walsh, A. and Whiting, M. and Breen, S. and Britton, T. and Brooks, K. et al. 2012. The H2O Southern Galactic Plane Survey: NH3 (1,1) and (2,2) catalogues. Monthly Notices of the Royal Astronomical Society. 426 (3): pp. 1972-1991.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    Additional URLs
    http://mnras.oxfordjournals.org/content/426/3/1972.full.pdf+html
    ISSN
    0035-8711
    URI
    http://hdl.handle.net/20.500.11937/14116
    Collection
    • Curtin Research Publications
    Abstract

    The H2O Southern Galactic Plane Survey (HOPS) has mapped a 100° strip of the Galactic plane (-70° > l > 30°, |b| < 0°.5) using the 22 m Mopra antenna at 12 mm wavelengths. Observations were conducted in on-the-fly mode using the Mopra spectrometer (MOPS), targeting water masers, thermal molecular emission and radio-recombination lines. Foremost among the thermal lines are the 23 GHz transitions of NH3 J,K = (1,1) and (2,2), which trace the densest parts of molecular clouds (n > 104 cm-3). In this paper, we present the NH3 (1,1) and (2,2) data, which have a resolution of 2 arcmin and cover a velocity range of ±200 km s-1. The median sensitivity of the NH3 data cubes is sT mb =0.20±0.06 K. For the (1,1) transition, this sensitivity equates to a 3.2 kpc distance limit for detecting a 20 K, 400 M? cloud at the 5s level. Similar clouds of mass 5000 M? would be detected as far as the Galactic Centre, while 30 000 M? clouds would be seen across the Galaxy. We have developed an automatic emission finding procedure based on the Australian Telescope National Facility (ATNF)DUCHAMP software and have used it to create a new catalogue of 669 dense molecular clouds. The catalogue is 100 per cent complete at the 5s detection limit (Tmb = 1.0 K). A preliminary analysis of the ensemble cloud properties suggests that the near-kinematic distances are favoured. The cloud positions are consistent with current models of the Galaxy containing a long bar. Combined with other Galactic plane surveys this new molecular-line dataset constitutes a key tool for examining Galactic structure and evolution. Data cubes, spectra and catalogues are available to the community via the HOPS website.

    Related items

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

    • The HI/OH/Recombination line survey of the inner Milky Way (THOR): Survey overview and data release 1
      Beuther, H.; Bihr, S.; Rugel, M.; Johnston, K.; Wang, Y.; Walter, F.; Brunthaler, A.; Walsh, Andrew; Ott, J.; Stil, J.; Henning, T.; Schierhuber, T.; Kainulainen, J.; Heyer, M.; Goldsmith, P.; Anderson, L.; Longmore, S.; Klessen, R.; Glover, S.; Urquhart, J.; Plume, R.; Ragan, S.; Schneider, N.; McClure-Griffiths, N.; Menten, K.; Smith, R.; Roy, N.; Shanahan, R.; Nguyen-Luong, Q.; Bigiel, F. (2016)
      Context. The past decade has witnessed a large number of Galactic plane surveys at angular resolutions below 20''. However, no comparable high-resolution survey exists at long radio wavelengths around 21 cm in line and ...
    • H2O Southern Galactic Plane Survey (HOPS): Paper III - properties of dense molecular gas across the inner Milky Way
      Longmore, S.; Walsh, Andrew; Purcell, C.; Burke, D.; Henshaw, J.; Walker, D.; Urquhart, J.; Barnes, A.; Whiting, M.; Burton, M.; Breen, S.; Britton, T.; Brooks, K.; Cunningham, M.; Green, J.; Harvey-Smith, L.; Hindson, L.; Hoare, M.; Indermuehle, B.; Jones, P.; Lo, N.; Lowe, V.; Moore, T.; Thompson, M.; Voronkov, M. (2017)
      © 2017 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. The H 2 O Southern Galactic Plane Survey (HOPS) has mapped 100 deg 2 of the Galactic plane for water masers and thermal ...
    • The Mopra Southern Galactic Plane CO Survey
      Burton, M.; Braiding, C.; Glueck, C.; Goldsmith, P.; Hawkes, J.; Hollenbach, D.; Kulesa, C.; Martin, C.; Pineda, J.; Rowell, G.; Simon, R.; Stark, A.; Stutzki, J.; Tothill, N.; Urquhart, J.; Walker, C.; Walsh, Andrew; Wolfire, M. (2013)
      We present the first results from a new carbon monoxide (CO) survey of the southern Galactic plane being conducted with the Mopra radio telescope in Australia. The 12CO, 13CO, and C18O J = 1–0 lines are being mapped over ...
    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.