Subjects: Astronomy >> Astrophysics submitted time 2024-01-16
Abstract：
The pulsar radio emission mechanism remains an enigma over half a century.
A successful radiation process requires not only to explain the coherency, but also
microstructures, characteristic frequency of emission, and the “death line" problem, etc.
These challenge both the long standing gap models and recent models of magnetic reconnection
with emission based on open field lines.
This article points out that each intermittent plasma ejection from Y-point,
the boundary of closed zone intersecting the equatorial plane,
near the light cylinder of pulsar magnetosphere can
stretch a bundle of closed field lines significantly. Corresponding magnetic pressure imposed on the trapped plasma provides ideal site of
magnetic reconnection and hence generating pairs and Alfven wave near light cylinder.
The resultant marginal stable instability is expected for coherent curvature emission. This not only interprets above problems in a simple and unified way, but also offers hints to the behavior of Rotating Radio Transients (RRATs) and Fast Radio Bursts (FRBs).
Peer Review Status:
Awaiting Review
Subjects: Astronomy >> Astrophysics submitted time 2023-12-04
Abstract： The pulsar radio emission mechanism remains an enigma over half a century.
A successful radiation process requires not only to explain the coherency and high degree of polarization of the emission, but also
microstructures, characteristic frequency of emission, and the “death line" problem, etc. These issues challenge both the long standing cap models and recent models of magnetic reconnection assuming stationary magnetosphere of a pulsar.
This article proposes a radio emission through global-local interaction of pulsar magnetosphere. The centrifugal force at the light cylinder leads to the concentration of both field lines and plasma in an equatorial layer much less than that of a pulsar magnetosphere.
The resultant magnetic reconnection with chain of plasmoids interprets not only the above problems in a simple and unified way, but also Rotating Radio Transients (RRATs) and Fast Radio Bursts (FRBs).
Peer Review Status:Awaiting Review
Hits
Hits
Downloads
Comment