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    A Large-Scale, Low-Frequency Murchison Widefield Array Survey of Galactic H ii Regions between 260° </<340°

    240847_240847.pdf (2.849Mb)
    Access Status
    Open access
    Authors
    Hindson, L.
    Johnston-Hollitt, M.
    Hurley-Walker, Natasha
    Callingham, J.
    Su, H.
    Morgan, J.
    Bell, M.
    Bernardi, G.
    Bowman, J.
    Briggs, F.
    Cappallo, R.
    Deshpande, A.
    Dwarakanath, K.
    For, B.
    Gaensler, B.
    Greenhill, L.
    Hancock, P.
    Hazelton, B.
    Kapinska, A.
    Kaplan, D.
    Lenc, E.
    Lonsdale, C.
    Mckinley, B.
    McWhirter, S.
    Mitchell, D.
    Morales, M.
    Morgan, E.
    Oberoi, D.
    Offringa, A.
    Ord, S.
    Procopio, P.
    Prabu, T.
    Shankar, N.
    Srivani, K.
    Staveley-Smith, L.
    Subrahmanyan, R.
    Tingay, Steven
    Wayth, Randall
    Webster, R.
    Williams, A.
    Williams, C.
    Wu, C.
    Zheng, Q.
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hindson, L. and Johnston-Hollitt, M. and Hurley-Walker, N. and Callingham, J. and Su, H. and Morgan, J. and Bell, M. et al. 2016. A Large-Scale, Low-Frequency Murchison Widefield Array Survey of Galactic H ii Regions between 260° </<340°. Publications of the Astronomical Society of Australia. 33: e020.
    Source Title
    Publications of the Astronomical Society of Australia
    DOI
    10.1017/pasa.2016.19
    ISSN
    1323-3580
    School
    Curtin Institute of Radio Astronomy (Physics)
    URI
    http://hdl.handle.net/20.500.11937/32788
    Collection
    • Curtin Research Publications
    Abstract

    We have compiled a catalogue of H ii regions detected with the Murchison Widefield Array between 72 and 231 MHz. The multiple frequency bands provided by the Murchison Widefield Array allow us identify the characteristic spectrum generated by the thermal Bremsstrahlung process in H ii regions. We detect 306 H ii regions between 260°< / < 340° and report on the positions, sizes, peak, integrated flux density, and spectral indices of these H ii regions. By identifying the point at which H ii regions transition from the optically thin to thick regime, we derive the physical properties including the electron density, ionised gas mass, and ionising photon flux, towards 61 H ii regions. This catalogue of H ii regions represents the most extensive and uniform low frequency survey of H ii regions in the Galaxy to date.

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