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| Paper: |
Mode Segregation Analysis of Pulsar B1237+25 |
| Volume: |
466, Electromagnetic Radiation from Pulsars and Magnetars |
| Page: |
113 |
| Authors: |
Smith, E. M.; Rankin, J. M. |
| Abstract: |
Pulsar radiation exhibits “modes” of two types: “profile modes” refer to intervals
(seconds to hours) during which the individual pulse trains differ significantly in
total power, polarization or other properties—thus exhibiting distinct average
profiles—and “orthogonal polarization modes” (OPMs) representing radiation
propagating parallel or perpendicular to the projected magnetic field direction.
Pulsar B1237+25 provides a remarkable example of both types of modal effects.
Moreover, its five-component profile results from a line-of-sight passage through
both an outer and inner cone of emission and a central core beam. Here, we
report on analysis of an Arecibo 327-MHz observation wherein the pulses were
segregated first according to whether they belonged to the star's “normal” or
“abnormal” mode and then according to the primary or secondary OPM. Using
these methods we develop a new understanding of the pulsar's abnormal mode
and identify intensity-dependent aberration/retardation in the abnormal core
emission. |
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