Browsing Faculty of Natural and Agricultural Sciences by Author "de596532-0214-40f0-9955-a15702cdd3d1"

Now showing items 1-7 of 7

    • The aid of optical studies in understanding millisecond pulsar binaries 

      Wadiasingh, Zorawar; Venter, Christo; Böttcher, Markus; Harding, Alice K. (Sissa Medialab, 2016)
      A large number of new “black widow” and “redback” energetic millisecond pulsars with irradiated stellar companions have been discovered through radio and optical searches of unidentified Fermi sources. Synchrotron emission, ...

    • Hard spectral tails in magnetars 

      Wadiasingh, Zorawar; Baring, Matthew G.; Gonthier, Peter L.; Harding, Alice K. (Cambridge Univ Press, 2017)
      Pulsed non-thermal quiescent emission between 10 keV and around 150 keV has been observed in ~10 magnetars. For inner magnetospheric models of such hard X-ray signals, resonant Compton upscattering of soft thermal photons ...

    • High-energy emission from Black Widows and Redbacks 

      Wadiasingh, Zorawar; Venter, Christo; Böttcher, Markus; Harding, Alice K. (Sissa Medialab, 2015)
      A large number of new black widow and redback energetic millisecond pulsars with irradiated stellar companions have been discovered through radio searches of unidentified Fermi sources. We construct a 3D emission model ...

    • MSP binaries as astrophysical laboratories 

      Wadiasingh, Zorawar; Venter, Christo; Böttcher, Markus; Harding, Alice K.; Baring, Matthew G. (Cambridge Univ Press, 2018)
      Follow-up of unidentified Fermi sources has expanded the number of known galactic-field “black widow” and “redback” millisecond pulsar binaries from four to nearly 30. Several systems observed by Chandra, XMM-Newton, Suzaku, ...

    • Opacities for photon splitting and pair creation in neutron star magnetospheres 

      Hu, Kun; Wadiasingh, Zorawar; Baring, Matthew G.; Harding, Alice K. (Oxford Univ Press, 2019)
      Over the last four decades, persistent and flaring emission of magnetars observed by various telescopes has provided us with a suite of light curves and spectra in soft and hard X-rays, with no emission yet detected above ...

    • Pressure balance and intrabinary shock stability in rotation-powered-state redback and transitional millisecond pulsar binary systems 

      Wadiasingh, Zorawar; Venter, Christo; Böttcher, Markus; Kilian, Patrick; Harding, Alice K. (IOP Publishing, 2018)
      A number of low-mass millisecond pulsar (MSP) binaries in their rotation-powered state exhibit double-peaked X-ray orbital modulation centered at inferior pulsar conjunction. This state, which has been known to persist for ...

    • Resonant inverse Compton scattering spectra from highly magnetized neutron stars 

      Wadiasingh, Zorawar; Baring, Matthew G.; Gonthier, Peter L.; Harding, Alice K. (IOP Publishing, 2018)
      Hard, nonthermal, persistent pulsed X-ray emission extending between 10 and ~150 keV has been observed in nearly 10 magnetars. For inner-magnetospheric models of such emission, resonant inverse Compton scattering of soft ...