The optical to gamma-ray emission of the Crab pulsar: a multicomponent model

Details The optical to gamma-ray emission of the Crab pulsar: a multicomponent model The optical to gamma-ray emission of the Crab pulsar: a multicomponent model

2006-07-18

arxiv.org/abs/astro-ph/0607410v1

Astron.Astrophys. 459 (2006) 859-870

Astronomy and Astrophysics

Astrophysics

14 pages, 16 figures; accepted by Astronomy and Astrophysics

Scientific paper

10.1051/0004-6361:20065118

We present a multicomponent model to explain the features of the pulsed emission and spectrum of the Crab Pulsar, on the basis of X and gamma-ray observations obtained with BeppoSAX, INTEGRAL and CGRO. 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 more components. The first component, C_O, is assumed to have the pulsed double-peaked profile observed at the optical frequencies, while the second component, C_X, is dominant in the interpeak and second peak phase regions. The spectra of these components are modelled with log-parabolic laws and their spectral energy distributions have peak energies at 12.2 and 178 keV, respectively. To explain the properties of the pulsed emission in the MeV-GeV band, we introduce two more components, C_Ogamma and C_Xgamma, with phase distributions similar to those of C_O and C_X and log-parabolic spectra with the same curvature but peak energies at about 300 MeV and 2 GeV. This multicomponent model is able to reproduce both the broadband phase-resolved spectral behaviour and the changes of the pulse shape with energy. We also propose some possible physical interpretations in which C_O and C_X are emitted by secondary pairs via a synchrotron mechanism while C_Ogamma and C_Xgamma can originate either from Compton scattered or primary curvature photons.

Affiliated with

Also associated with

No associations

Rating

The optical to gamma-ray emission of the Crab pulsar: a multicomponent model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The optical to gamma-ray emission of the Crab pulsar: a multicomponent model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The optical to gamma-ray emission of the Crab pulsar: a multicomponent model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-122592