Abstract Details

Name: Gangadhara R T
Affiliation: Indian Institute of Astrophysics
Conference ID: ASI2021_236
Title : The Coherent Radio Emission Mechanism of Pulsars
Authors and Co-Authors : R. T. Gangadhara^{1,2}, J. L. Han^1, P. F. Wang^1 Author1(National Astronomical Observatories, 
Chinese Academy of Sciences, A20 Datun Road, Chaoyang District, Beijing - 100012, China) Author2(Indian Institute of Astrophysics, Bangalore - 560034, India)
Abstract Type : Oral
Abstract Category : Stars, ISM and Galaxy
Abstract : Although almost 50 years have passed since the pulsar discovery, their radio emission mechanism still remains unknown. This is one of the most challenging problems of modern astrophysics. Curvature radiation seems to be the most natural and practically unavoidable emission process in the pulsar magnetosphere. By considering relativistic plasma motion in curved magnetic fields, we have deduced the analytical formulation for coherently emitted curvature radiation in the radio band. The pair plasma is generally believed to support the excitation of plasma waves of large amplitude, which intern phase the particles to radiate resonantly and coherently in the dipolar magnetic field of pulsars. We have developed a coherent curvature radiation model for the radio pulsars based on the implications of the tangent model. We numerically simulated the polarization profiles of pulsars by considering different viewing conditions in the pulsars having an oblique dipolar magnetic field, and estimated the flux density. We discuss (1) the emission frequency mapping into radius and (2) whether sub-pulses and micro-pulses are temporal or angular features.