Constraint on parameters of the Inverse Compton Scattering model for radio pulsars

Details Constraint on parameters of the Inverse Compton Scattering model for radio pulsars Constraint on parameters of the Inverse Compton Scattering model for radio pulsars

2011-08-19

arxiv.org/abs/1108.3939v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

32 pages,18 figures, Accepted by the ApJ

Scientific paper

The inverse Compton scattering (ICS) model can explain various pulse profile shapes and diversity of pulse profile evolution based on the mechanism that the radio emission is generated through inverse Compton scattering between secondary relativistic particles and radio waves from polar gap avalanches. In this paper, we study the parameter space of ICS model for 15 pulsars, which share the common pulse profile evolution phenomena that the pulse profiles are narrower at higher observing frequencies. Two key parameters, the initial Lorentz factor and the energy loss factor of secondary particles are constrained using the least square fitting method, where we fit the theoretical curve of the "beam-frequency mapping" of the ICS model to the observed pulse widths at multiple frequencies. The uncertainty of the inclination and viewing angles are taken into account in the fitting process. It is found that the initial Lorentz factor is larger than 4000, and the energy loss factor is between 20 and 560. The Lorentz factor is consistent with the prediction of the inner vacuum gap model. Such high energy loss factors suggest significant energy loss for secondary particles at altitudes of a few tens to hundreds of kilometers.

Affiliated with

Also associated with

No associations

Rating

Constraint on parameters of the Inverse Compton Scattering model for radio pulsars 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 Constraint on parameters of the Inverse Compton Scattering model for radio pulsars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constraint on parameters of the Inverse Compton Scattering model for radio pulsars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-108275