Kavli Affiliate: Kejia Lee
| First 5 Authors: Zhengli Wang, Jiguang Lu, Jinchen Jiang, Jie Lin, Kejia Lee
| Summary:
Pulsars, known as the "lighthouses" in the universe, are thought to emit
periodic pulses with duty-cycle ~10%. In this report, the 160min-data of a
nearby pulsar, PSR B0950+08, observed with the Five-hundred-meter Aperture
Spherical radio Telescope (FAST) is analysed. Thanks to the extremely high
sensitivity of FAST, it is found that the radiation of PSR B0950+08 could be
detected over the entire pulse period. To investigate the radiative
characteristics of the pulsar’s bridge emission, a function, ${Theta}$(n), is
defined to reveal the weak radiation there. It is suggested that the narrow
peaks of both the main and the inter pulses could be radiated at low altitude,
while other weak emission (e.g., the "bridges") from high magnetosphere far
away from the surface though its radiative mechanism is still a matter of
debate. The measured mean pulse behaviors are consistent with previous results
in the phase of strong emission, and both the frequency-independent separation
between the interpulse and main pulse and the narrow pulse width may support a
double-pole model. Nonetheless, in order to finalize the magnetospheric
geometry, further polarization observation with FAST is surely required, which
would only be believable in the phase of weak emission if the baseline is
determined with certainty in the future.
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