The study of very-high-energy (VHE) emission from rotation-powered \npulsars entered a new era ten years ago with the detection of pulsed \nemission from Crab at energies in the range 25-400 GeV by MAGIC. This \nwas quickly followed by pulsed detections above 100 GeV by VERITAS, and \nup to 1.5 TeV with MAGIC. Most recently, HESS has announced detection of\n pulsed emission from Vela from 20 GeV to above 3 TeV. MAGIC has, also, \nannounced detection of pulsed emission from Geminga. Emission up to 1 \nTeV appears to connect smoothly to the GeV spectra measured by Fermi, \nexcept for the emission above 3 TeV from Vela, which may be a separate \ncomponent. In the near future, CTA will provide improved sensitivity in \ntwo energy domains very much relevant for pulsar physics, namely 30-100 \nGeV and the multi-TeV range. Meanwhile, there has been a huge \ntheoretical and numerical effort to understand the origin of \u03b3-ray \nemission in pulsars. Several magnetospheric emission models purport to \naccount for the Fermi spectra with curvature radiation. Several \nadditional models (synchrotron, inverse-Compton, cyclotron or \nsynchrotron self-Compton etc.) have been proposed to account for the \npulsed emission above 100 GeV. Unfortunately, the predictive power of \ncurrent models is at best weak.<\/p>\n\n\n\n
We have assembled an International Team of Experts on pulsar \u03b3-ray \nobservations and pulsar magnetosphere modelling. The Team will present, \ncompare, and evaluate various theoretical and numerical models based on \ntheir ability to reproduce best the VHE pulsed spectra of Crab, Vela and\n Geminga. It will quantify their limitations, will propose avenues \nbeyond the current state-of-the-art (e.g. hybrid modeling, new numerical\n methods, new emission sites), and will make predictions that will be \ntested with CTA. A review of the Team\u2019s conclusions and recommendations \nis expected at the end of the project. This effort aims to achieve a \ndeeper understanding of combined space and ground GeV\u2013TeV observations \nthrough joint multidisciplinary research, and to pave the way for future\n international collaborations, and improved high-energy pulsar modeling.<\/p>\n","protected":false},"excerpt":{"rendered":"
The study of very-high-energy (VHE) emission from rotation-powered pulsars entered a new era ten years ago with the detection of pulsed emission from Crab at energies in the range 25-400 GeV by MAGIC. This was quickly followed by pulsed detections … Continue reading