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    First parallax measurements toward a 6.7 GHZ methanol maser with the Australian long baseline array - Distance to G 339.884-1.259

    234765_234765.pdf (527.4Kb)
    Access Status
    Open access
    Authors
    Krishnan, V.
    Ellingsen, S.
    Reid, M.
    Brunthaler, A.
    Sanna, A.
    McCallum, J.
    Reynolds, C.
    Bignall, H.
    Phillips, C.
    Dodson, R.
    Rioja, M.
    Caswell, J.
    Chen, X.
    Dawson, J.
    Fujisawa, K.
    Goedhart, S.
    Green, J.
    Hachisuka, K.
    Honma, M.
    Menten, K.
    Shen, Z.
    Voronkov, M.
    Walsh, Andrew
    Xu, Y.
    Zhang, B.
    Zheng, X.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Krishnan, V. and Ellingsen, S. and Reid, M. and Brunthaler, A. and Sanna, A. and McCallum, J. and Reynolds, C. et al. 2015. First parallax measurements toward a 6.7 GHZ methanol maser with the Australian long baseline array - Distance to G 339.884-1.259. Astrophysical Journal. 805: 129.
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/805/2/129
    ISSN
    0004-637X
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    Copyright © 2015 The American Astronomical Society. Reproduced by permission of the AAS

    URI
    http://hdl.handle.net/20.500.11937/45977
    Collection
    • Curtin Research Publications
    Abstract

    © 2015. The American Astronomical Society. All rights reserved. We have conducted the first parallax and proper motion measurements of 6.7 GHz methanol maser emission using the Australian Long Baseline Array. The parallax of G 339.8841.259 measured from five epochs of observations is 0.48 ± 0.08 mas, corresponding to a distance of - 2.1+0.4 -0.3 kpc, placing it in the Scutum spiral arm. This is consistent (within the combined uncertainty) with the kinematic distance estimate for this source at 2.5 ± 0.5 kpc using the latest Solar and Galactic rotation parameters. We find from the Lyman continuum photon flux that the embedded core of the young star is of spectral type B1, demonstrating that luminous 6.7 GHz methanol masers can be associated with high-mass stars toward the lower end of the mass range.

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