Browsing Research Output by Author "Harding, A.K."

Now showing items 1-9 of 9

    • The anatomy of γ-ray pulsar light curves 

      Seyffert, A.S.; Venter, C.; Johnson, T.J.; Harding, A.K. (South African Institute of Physics, 2014)
      To obtain constraints on the inclination and observer angles, <i>α</i> and <i>ζ</i>, of a <i>γ</i>-ray pulsar from its observed light curve (LC), we make use of geometric models detailing the position and extent of emission ...

    • Constraints on the emission geometries and spin evolution of gamma-ray millisecond pulsars 

      Johnson, T.J.; Venter, C.; Harding, A.K.; Guillemot, L.; Smith, D.A. (IOP Publishing, 2014)
      Millisecond pulsars (MSPs) are a growing class of gamma-ray emitters. Pulsed gamma-ray signals have been detected from more than 40 MSPs with the Fermi Large Area Telescope (LAT). The wider radio beams and more compact ...

    • The effect of different magnetospheric structures on predictions of gamma-ray pulsar light curves 

      Breed, M.; Venter, C.; Harding, A.K.; Johnson, T.J. (South African Institute of Physics, 2012)
      The second pulsar catalogue of the Fermi Large Area Telescope (LAT) will contain in excess of 100 gamma-ray pulsars. The light curves (LCs) of these pulsars exhibit a variety of shapes, and also different relative phase ...

    • High-energy pulsar models: developments and new questions 

      Venter, C.; Harding, A.K. (Wiley, 2014)
      The past few years have seen a major advance in observational knowledge of high-energy (HE) pulsars. The Fermi Large Area Telescope (LAT) and AGILE have increased the number of known γ-ray pulsars by an order of magnitude, ...

    • Implementation of an offset-dipole magnetic field in a pulsar modelling code 

      Breed, M.; Venter, C.; Harding, A.K.; Johnson, T.J. (South African Institute of Physics, 2013)
      The field of gamma-ray pulsars (rapidly spinning and highly magnetized neutron stars (NSs)) has been revolutionized by the launch of <i>Fermi</i> Large Area Telescope (LAT) in June 2008. <i>Fermi</i> LAT will soon release ...

    • Modeling phase-aligned gamma-ray and radio millisecond pulsar light curves 

      Venter, C.; Johnson, T.J.; Harding, A.K. (IOP Publishing, 2012)
      Since the discovery of the first eight gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope, this population has been steadily expanding. Four of the more recent detections, PSR J0034–0534, PSR J1939+2134 ...

    • Modelling the light curves of Fermi LAT millisecond pulsars 

      Venter, C.; Johnson, T.J.; Harding, A.K.; Grove, J.E. (South African Institute of Physics, 2014)
      There are 40 millisecond pulsars (MSPs) in the second pulsar catalogue of the Fermi Large Area Telescope (LAT). This pulsar subpopulation is unique owing to their relatively small magnetospheres. This may result in radio ...

    • Modelling the y-ray and radio light curves of the double pulsar system 

      Seyffert, A.S.; Venter, C.; Harding, A.K.; Johnson, T.J. (South African Institute of Physics, 2014)
      Guillemot et al. recently reported the discovery [1] of -ray pulsations from the 22.7 ms pulsar (pulsar A) in the famous double pulsar system J0737−3039A/B. The -ray light curve (LC) of pulsar A has two peaks separated ...

    • Probing millisecond pulsar emission geometry using light curves from the fermi/large area telescope 

      Venter, C.; Harding, A.K.; Guillemot, L. (IOP Publishing, 2009)
      An interesting new high-energy pulsar sub-population is emerging following early discoveries of gamma-ray millisecond pulsars (MSPs) by the Fermi Large Area Telescope (LAT). We present results from three-dimensional emission ...