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    Inverse mapping of polarized optical emission from pulsars: basic formulation and determination of emission altitude

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    Date
    2011-08-22
    Author
    Mc Donald, J.
    O’ Connor, P.
    de Burca, D.
    Golden, A.
    Shearer, A.
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    Cited 10 times in Scopus (view citations)
    
    Recommended Citation
    Mc Donald, J. O’ Connor, P.; de Burca, D.; Golden, A.; Shearer, A. (2011). Inverse mapping of polarized optical emission from pulsars: basic formulation and determination of emission altitude. Monthly Notices of the Royal Astronomical Society 417 (1), 730-744
    Published Version
    https://academic.oup.com/mnras/article-pdf/417/1/730/3033993/mnras0417-0730.pdf
    Abstract
    We present an inverse mapping approach to determining the emission height of the optical photons from pulsars, which is directly constrained by empirical data. The model discussed is for the case of the Crab pulsar. Our method, using the optical Stokes parameters, determines the most likely geometry for emission including magnetic field inclination angle (alpha), observer's line-of-sight angle (chi) and emission height. We discuss the computational implementation of the approach, along with any physical assumptions made. We find that the most likely emission altitude is at 20 per cent of the light cylinder radius above the stellar surface in the open field region. We also present a general treatment of the expected polarization from synchrotron source with a truncated power-law spectrum of particles.
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    http://hdl.handle.net/10379/12695
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    • Externally hosted open access publications with NUI Galway authors (2)

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