Open AccessRadio Emission from Pulsars due to Relativistic Plasma
Author(s) -
Tridib Roy,
R. T. Gangadhara
Publication year - 2019
Publication title -
astrophysical journal/the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.3847/1538-4357/ab1fe5
Subject(s) - physics , pulsar , neutron star , polarization (electrochemistry) , astrophysics , plasma , brightness , magnetic field , dipole , magnetic dipole , relativistic plasma , stokes parameters , computational physics , astronomy , optics , scattering , nuclear physics , chemistry , quantum mechanics
Pulsar radio emission is not well understood because of a lack of knowledge about the emission geometry and the plasma process involved. We develop a mechanism for pulsar radio emission that takes into account the detailed viewing geometry of pulsars and the dipolar magnetic field configuration. Using a suitably chosen geometry and plasma parameters, we derive analytical expressions for the Stokes parameters of the radiation field in the frame centered on the neutron star. We have simulated pulse profiles based on our analytical formulation. It seems that we can explain the enhanced radiation and most of the diverse polarization properties of radio pulsars. We have estimated the brightness temperature, which seems to agree with the observations. The polarization angle predicted by the model is in good agreement with the rotating vector model.