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| Paper: |
Double Notches: The Imprint of Microscopic Radio Emission Beam |
| Volume: |
466, Electromagnetic Radiation from Pulsars and Magnetars |
| Page: |
137 |
| Authors: |
Dyks, J.; Rudak, B. |
| Abstract: |
High-quality integrated radio profiles of some pulsars contain
double, highly symmetric absorption features (double notches).
They can be interpreted as an imprint of the microscopic beam of curvature
radiation in the orthogonal polarization mode. This model explains:
1) the double and symmetric form of double notches;
2) high-polarization degree of the emission that contains the notches;
3) the rate of merging of the minima in the notches
with increasing frequency ν;
4) the shape of double notches observed in B1929+10;
5) fixed (ν-independent) location of notches in the pulse profiles.
Oblique cuts of sightline through the notches can furthermore
explain their observed size and imperfections of symmetry.
The same beam which is observed as the notches, is likely responsible for
the bifurcated emission components observed in pulse profiles of some
pulsars. |
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