| Pulsars are the most mysterious objects in universe, whose physical essence and radiation mechanism have not been solved for decades. With its precise periodic, for a given pulsar, a stable integrated profile can be obtained at the same frequency. Pulsar’s profile is one of the direct observable parameters, which are divided into single profile, double profile and multi profile as they appear. People established many models for radio beam, such as cone-core model, which can explain simple symmetric single profile, double profile and triple profile but cannot give a solution to unsymmetrical profile, so the patch model were be build.This thesis did two jobs around radiation pulse profile of pulsar:one is to test and verify the relationship between width of core and cone components of pulse profile, the other is to test and verify the relationship between radiation beam radii and period.To test and verify the relationship between width of core and cone components of pulse profile. Some research found that there is a relationship: for the widths of conal and core components of cone-core pulsars, W50, conal=0.7H50. core. To confirm it, we select33pulsars with significant conal and core components. Then, we use Gaussian functions to fit the profiles and obtain the width W50for each component. The relations between core and conal components for triple, five component pulsars and all of them are investigated seperately. We find that the width for core and cone components shows no relation with ratio of0.7.To test and verify the relationship between radiation beam radii and period. About this work, different people have different conclusions. Beam radii cannot be observed, but it is relative to profile width, inclining angel and impact angel. People used to get their results from assuming a is equal to90degree, but we set a is equal to30,45,60,90respectively, and we use three kinds of widths W10、W50、Wpp. We find that the relation between beam radii and period is inclining to ρ∝P1/2. |
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