EDP Sciences
Free access
Volume 499, Number 3, June I 2009
Page(s) 847 - 850
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361/200811599
Published online 29 April 2009
A&A 499, 847-850 (2009)
DOI: 10.1051/0004-6361/200811599

Research Note

The multicomponent model of the Crab Pulsar at energies above 25 GeV

R. Campana1, 2, E. Massaro1, T. Mineo3, and G. Cusumano3

1  Department of Physics, University of Rome “La Sapienza”, Piazzale A. Moro 2, 00185, Roma, Italy
    e-mail: riccardo.campana@uniroma1.it
2  INAF-IASF-Roma, via Fosso del Cavaliere 100, 00133 Roma, Italy
3  INAF-IASF-Palermo, via U. La Malfa 153, 90198 Palermo, Italy

Received 28 December 2008 / Accepted 13 March 2009

We review a proposed multicomponent model to explain the features of the pulsed emission and spectrum of the Crab Pulsar, in the light of the recent detection of pulsed emission above 25 GeV from the MAGIC atmospheric Čerenkov telescope. This model explains the evolution of the pulse shape and of the phase-resolved spectra, ranging from the optical/UV to the GeV energy band, on the assumption that the observed emission is due to several components, which have spectra modelled as log-parabolic laws. We show that the new MAGIC data are well consistent with the predictions of our model.

Key words: stars: pulsars: general -- X-rays: stars -- gamma rays: observations

© ESO 2009