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Is Coherence Essential to Account for Pulsar Radio Emission?
Astrophysics · Submitted 4 Feb 1999
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Coherence may not be an essential condition to account for pulsar radio emission.
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The abstract, sentence by sentence
Based on definitions, two joint-criteria, namely, the optical-thin constraint and the energy budget constraint, are proposed to judge whether the emission nature of radio pulsars is incoherent or obligatory to be coherent. We find that the widely accepted criterion, $kT_B \le \epsilon$, is not a rational criterion to describe the optical-thin condition, even for the simplest case. The energy budget constraint could be released by introducing a certain efficient radiation mechanism (e.g. the inverse Compton scattering, QL98) with emission power of a single particle as high as a critical value $P_{sing,c} \sim 10^{-4}-10^{-3} {erg s}^{-1}$. This in principle poses the possibilities to interpret high luminosities of pulsars in terms of incoherent emission mechanisms, if the optical-thin constraint could be released by certain mechanism as well. Coherence may not be an essential condition to account for pulsar radio emission.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Based on definitions, two joint-criteria, namely, the optical-thin constraint and the energy budget constraint, are proposed to judge whether the emission nature of radio pulsars is incoherent or obligatory to be coherent. | contribution 0.58 | 0.79 | 0.04 | asserted 0.99 |
| s1 | We find that the widely accepted criterion, $kT_B \le \epsilon$, is not a rational criterion to describe the optical-thin condition, even for the simplest case. | result 0.99 | 0.92 | 0.04 | asserted 1.00 |
| s2 | The energy budget constraint could be released by introducing a certain efficient radiation mechanism (e.g. the inverse Compton scattering, QL98) with emission power of a single particle as high as a critical value $P_{sing,c} \sim 10^{-4}-10^{-3} {erg s}^{-1}$. | result 0.77 | 0.47 | 0.04 | hedged possibility 0.97 |
| s3 | This in principle poses the possibilities to interpret high luminosities of pulsars in terms of incoherent emission mechanisms, if the optical-thin constraint could be released by certain mechanism as well. | interpretation 0.99 | 0.33 | 0.08 | hedged possibility 0.97 |
| s4 | Coherence may not be an essential condition to account for pulsar radio emission. | interpretation 0.83 | 0.69 | 0.93 | hedged possibility 1.00 |
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The paper
Original abstract
Based on definitions, two joint-criteria, namely, the optical-thin constraint and the energy budget constraint, are proposed to judge whether the emission nature of radio pulsars is incoherent or obligatory to be coherent. We find that the widely accepted criterion, $kT_B \le \epsilon$, is not a rational criterion to describe the optical-thin condition, even for the simplest case. The energy budget constraint could be released by introducing a certain efficient radiation mechanism (e.g. the inverse Compton scattering, QL98) with emission power of a single particle as high as a critical value $P_{sing,c} \sim 10^{-4}-10^{-3} {erg s}^{-1}$. This in principle poses the possibilities to interpret high luminosities of pulsars in terms of incoherent emission mechanisms, if the optical-thin constraint could be released by certain mechanism as well. Coherence may not be an essential condition to account for pulsar radio emission.
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