OH as a probe of the Milky Way's hidden gas: first results from SPLASH

J. R. Dawson*, A. J. Walsh, SPLASH Team

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


    SPLASH (the Southern Parkes Large-Area Survey in Hydroxyl) is a deep survey of ground-state OH absorption and emission from the Galactic Plane, as well as an unbiased search for OH masers. Key early results include the detection of a rich and complex distribution of diffuse, optically thin OH with strongly non-thermal excitation temperatures, and the detection of numerous new maser sources. The survey aims to use OH as a probe of CO-dark H-2 ISM Galactic scales, with future plans including comprehensive comparisons with CO and Hi, as well as non-LTE excitation modelling of the four ground-state lines.

    Original languageEnglish
    Title of host publicationFrom interstellar clouds to star-forming galaxies
    Subtitle of host publicationuniversal processes?
    EditorsPascale Jablonka, Philippe André, Floris van der Tak
    Place of PublicationCambridge, UK
    PublisherCambridge University Press (CUP)
    Number of pages2
    ISBN (Print)9781107135208
    Publication statusPublished - 2016
    Event315th Symposium of the International Astronomical Union - Honolulu, United States
    Duration: 3 Aug 20157 Aug 2015

    Publication series

    NameIAU Symposium Proceedings Series
    ISSN (Print)1743-9213


    Conference315th Symposium of the International Astronomical Union
    Country/TerritoryUnited States


    • ISM: clouds
    • ISM: evolution
    • ISM: molecules
    • masers
    • surveys


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