Browsing Faculty of Natural and Agricultural Sciences by Author "bd504648-5776-48d9-9edd-133998ecf735"

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    • Cosmic ray flux anisotropies caused by astrospheres 

      Scherer, K.; Strauss, R.D.; Ferreira, S.E.S.; Fichtner, H. (Elsevier, 2016)
      Huge astrospheres or stellar wind bubbles influence the propagation of cosmic rays at energies up to the TeV range and can act as small-scale sinks decreasing the cosmic ray flux. We model such a sink (in 2D) by a sphere ...

    • Cosmic rays in astrospheres 

      Scherer, K.; Van der Schyff, A.; Ferreira, S.E.S.; Strauss, R.D.; Bomans, D.J. (EDP Sciences, 2015)
      Context: Cosmic rays passing through large astrospheres can be efficiently cooled inside these “cavities” in the interstellar medium. Moreover, the energy spectra of these energetic particles are already modulated in front ...

    • Unidentified galactic high-energy sources as ancient pulsar wind nebulae in the light of new high energy observations and the new code 

      Tibolla, O.; Vorster, M.; De Jager, O.; Ferreira, S.E.S.; Venter, C. (AIP, 2012)
      In a Pulsar Wind Nebula (PWN), the lifetime of inverse Compton (IC) emitting e− exceeds the lifetime of its progenitor pulsar (as well as its shell-type remnant), but it also exceeds the age of those that emit via synchrotron ...