Kavli Affiliate: Kejia Lee
| First 5 Authors: Shunshun Cao, Jinchen Jiang, Jaroslaw Dyks, Longfei Hao, Kejia Lee
| Summary:
As one of the paradigm examples to probe into pulsar magnetospheric dynamics,
PSR B0943+10 (J0946+0951) manifests representatively, showing mode switch,
orthogonal polarization and subpulse drifting, frequently studied below 600
MHz. Here both integrated and single pulses are studied at a high frequency
(1.25 GHz) with FAST. The mode switch is studied using a profile decomposition
method. A phase space evolution for the pulsar’s mode switch shows a
strange-attractor-like pattern. The radiative geometry is proposed by fitting
polarization position angles with the rotating vector model. The pulsar pulse
profile is then mapped to the sparking locations on pulsar surface, and the
differences between the main pulse’s and the precursor component’s radiative
processes may explain the X-ray’s synchronization with radio mode switch.
Detailed single pulse studies on B0943+10’s orthogonally polarized radiation
are presented, which may support for certain models of radiative transfer of
polarized emission. Especially, the difference in OPMs’ circular polarization
might reflect the cyclotron absorption in pulsar magnetospheres. B0943+10’s B
and Q modes evolve differently with frequency and have different proportions of
orthogonal modes, which indicates possible magnetospheric changes during mode
switch. For Q mode pulse profile, the precursor and the main pulse components
are orthogonally polarized, and are probably originated from different depths
in the magnetosphere. The findings could impact significantly on pulsar
electrodynamics and the radiative mechanism related.
| Search Query: ArXiv Query: search_query=au:”Kejia Lee”&id_list=&start=0&max_results=3