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    Radio Astrometry of The Close Active Binary Hr 5110

    267688.pdf (1.661Mb)
    Access Status
    Open access
    Authors
    Abbuhl, E.
    Mutel, R.
    Lynch, Christene
    Gï Edel, M.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Abbuhl, E. and Mutel, R. and Lynch, C. and Gï Edel, M. 2015. Radio Astrometry of The Close Active Binary Hr 5110. Astrophysical Journal. 811 (1): Article ID 33.
    Source Title
    Astrophysical Journal
    DOI
    10.1088/0004-637X/811/1/33
    ISSN
    0004-637X
    School
    Curtin Institute of Radio Astronomy (Physics)
    Remarks

    Copyright © 2015. The American Astronomical Society. All rights reserved.

    URI
    http://hdl.handle.net/20.500.11937/69740
    Collection
    • Curtin Research Publications
    Abstract

    The close active binary HR 5110 was observed at six epochs over 26 days using a global very long baseline interferometry array at 15.4 GHz. We used phase referencing to determine the position of the radio centroid at each epoch with an uncertainty significantly smaller than the component separation. After correcting for proper motion and parallax, we find that the centroid locations of all six epochs have barycenter separations consistent with an emission source located on the KIV secondary, and not in an interaction region between the stars or on the F primary. We used a homogeneous power-law gyrosynchrotron emission model to reproduce the observed flux densities and fractional circular polarization. The resulting ranges of mean magnetic field strength and relativistic electron densities are of the order of 10 G and 105cm-3, respectively, in the source region.

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