English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Rotationally driven VHE emission from the Vela pulsar

MPS-Authors
/persons/resource/persons30943

Rieger,  F. M.
Division Prof. Dr. Werner Hofmann, MPI for Nuclear Physics, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Osmanov, Z., & Rieger, F. M. (2019). Rotationally driven VHE emission from the Vela pulsar. Astronomy and Astrophysics, 627: A22. doi:10.1051/0004-6361/201935030.


Cite as: https://hdl.handle.net/21.11116/0000-0005-4DB2-C
Abstract
Context. The recent detection of pulsed gamma-ray emission from the Vela pulsar in the similar to 10 to 100 GeV range by H.E.S.S. promises important potential to probe into the very high energy (VHE) radiation mechanisms of pulsars.
Aims. A combined analysis of H.E.S.S. and Fermi-LAT data suggests that the leading wing of the P2 peak shows a new, hard gamma-ray component (with photon index as hard as Gamma similar to 3.5), setting in above 50 GeV and extending beyond 100 GeV. We study these findings in the context of rotationally driven (centrifugal) particle acceleration.
Methods. We analyze achievable particle energies in the magnetosphere of the Vela pulsar and calculate the resultant emission properties.
Results. Inverse Compton up-scattering of thermal photons from the surface of the star is shown to lead a pulsed VHE contribution reaching into the TeV regime with spectral characteristics compatible with current findings. If confirmed by further observations this could be the second case where rotationally driven processes turn out to be important to understand the VHE emission in young pulsars.