RECORD
Rapid Modification of Neutron Star Surface Magnetic Field: A proposed mechanism for explaining Radio Emission State Changes in Pulsars
High Energy Astrophysical Phenomena · Submitted 4 May 2021
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim This is likely to affect the observed radio emission resulting in the observed state changes.
The compiled record
The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
Open the compiled record
The abstract, sentence by sentence
The radio emission in many pulsars show sudden changes, usually within a period, that cannot be related to the steady state processes within the inner acceleration region (IAR) above the polar cap. These changes are often quasi-periodic in nature, where regular transitions between two or more stable emission states are seen. The durations of these states show a wide variety ranging from several seconds to hours at a time. There are strong, small scale magnetic field structures and huge temperature gradients present at the polar cap surface. We have considered several processes that can cause temporal modifications of the local magnetic field structure and strength at the surface of the polar cap. Using different magnetic field strengths and scales, and also assuming realistic scales of the temperature gradients, the evolutionary timescales of different phenomena affecting the surface magnetic field was estimated. We find that the Hall drift results in faster changes in comparison to both Ohmic decay and thermoelectric effects. A mechanism based on the Partially Screened Gap (PSG) model of the IAR has been proposed, where the Hall and thermoelectric oscillations perturb the polar cap magnetic field to alter the sparking process in the PSG. This is likely to affect the observed radio emission resulting in the observed state changes.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The radio emission in many pulsars show sudden changes, usually within a period, that cannot be related to the steady state processes within the inner acceleration region (IAR) above the polar cap. | background 0.97 | 0.09 | 0.03 | asserted 1.00 |
| s1 | These changes are often quasi-periodic in nature, where regular transitions between two or more stable emission states are seen. | background 1.00 | 0.09 | 0.03 | asserted 0.91 |
| s2 | The durations of these states show a wide variety ranging from several seconds to hours at a time. | background 1.00 | 0.13 | 0.02 | asserted 1.00 |
| s3 | There are strong, small scale magnetic field structures and huge temperature gradients present at the polar cap surface. | background 0.98 | 0.15 | 0.02 | asserted 1.00 |
| s4 | We have considered several processes that can cause temporal modifications of the local magnetic field structure and strength at the surface of the polar cap. | contribution 0.74 | 0.90 | 0.03 | asserted 0.51 |
| s5 | Using different magnetic field strengths and scales, and also assuming realistic scales of the temperature gradients, the evolutionary timescales of different phenomena affecting the surface magnetic field was estimated. | method 0.97 | 0.92 | 0.05 | asserted 0.81 |
| s6 | We find that the Hall drift results in faster changes in comparison to both Ohmic decay and thermoelectric effects. | result 1.00 | 0.94 | 0.33 | asserted 1.00 |
| s7 | A mechanism based on the Partially Screened Gap (PSG) model of the IAR has been proposed, where the Hall and thermoelectric oscillations perturb the polar cap magnetic field to alter the sparking process in the PSG. | contribution 0.91 | 0.76 | 0.58 | asserted 0.58 |
| s8 | This is likely to affect the observed radio emission resulting in the observed state changes. | interpretation 0.99 | 0.34 | 0.50 | hedged possibility 1.00 |
What was examined, and what was not
- arXiv listing abstract v1
- full text
- figures and tables
- references and citing sentences
- relations to other papers
- P abstract
- S sections
- T body sentences
- C citations
- R cross-paper relations
The paper
Original abstract
The radio emission in many pulsars show sudden changes, usually within a period, that cannot be related to the steady state processes within the inner acceleration region (IAR) above the polar cap. These changes are often quasi-periodic in nature, where regular transitions between two or more stable emission states are seen. The durations of these states show a wide variety ranging from several seconds to hours at a time. There are strong, small scale magnetic field structures and huge temperature gradients present at the polar cap surface. We have considered several processes that can cause temporal modifications of the local magnetic field structure and strength at the surface of the polar cap. Using different magnetic field strengths and scales, and also assuming realistic scales of the temperature gradients, the evolutionary timescales of different phenomena affecting the surface magnetic field was estimated. We find that the Hall drift results in faster changes in comparison to both Ohmic decay and thermoelectric effects. A mechanism based on the Partially Screened Gap (PSG) model of the IAR has been proposed, where the Hall and thermoelectric oscillations perturb the polar cap magnetic field to alter the sparking process in the PSG. This is likely to affect the observed radio emission resulting in the observed state changes.
Human review
References
Discussion
Know something about this paper? Leave a comment, or highlight any passage above to comment on it.