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    Tracking dispersion measure variations of timing array pulsars with the GMRT

    Access Status
    Open access via publisher
    Authors
    Kumar, U.
    Gupta, Y.
    Van Straten, W.
    Oslowski, S.
    Roy, J.
    Bhat, Ramesh
    Bailes, M.
    Keith, M.
    Date
    2012
    Type
    Conference Paper
    
    Metadata
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    Citation
    Kumar, U. and Gupta, Y. and Van Straten, W. and Oslowski, S. and Roy, J. and Bhat, R. and Bailes, M. et al. 2012. Tracking dispersion measure variations of timing array pulsars with the GMRT, in van Leeuwen, J. (ed), Proceedings of the International Astronomical Union (IAU): Neutron Stars and Pulsars: Challenges and Opportunities after 80 years Symposium No. 291, Aug 20 2012, pp. 434-436. Bejing, China: IAUS.
    Source Title
    Proceedings of the International Astronomical Union
    DOI
    10.1017/S1743921312024404
    Additional URLs
    http://www.pulsarastronomy.net/IAUS291/proceedings/
    ISBN
    9781107033801
    School
    Curtin Institute of Radio Astronomy (Physics)
    URI
    http://hdl.handle.net/20.500.11937/50727
    Collection
    • Curtin Research Publications
    Abstract

    We present the results from nearly three years of monitoring of the variations in dispersion measure (DM) along the line-of-sight to 11 millisecond pulsars using the Giant Metrewave Radio Telescope (GMRT). These results demonstrate accuracies of single epoch DM estimates of the order of 5 × 10-4 cm-3 pc. A preliminary comparison with the Parkes Pulsar Timing Array (PPTA) data shows that the measured DM fluctuations are comparable. We show effects of DM variations due to the solar wind and solar corona and compare with the existing models.

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