Tomaschitz, R. (2014). Tachyonic quantum densities of relativistic electron plasmas: Cherenkov spectra of γ-ray pulsars, Physics Letters A 378, 2337-2344, DOI: 10.1016/j.physleta.2014.06.005
Abstract (ScienceDirect, SAO/NASA ADS)
Tachyonic Cherenkov radiation in second quantization can explain the subexponential spectral tails of GeV gamma-ray pulsars (Crab pulsar, PSR J1836+5925, PSR J0007+7303, PSR J2021+4026) recently observed with the Fermi-LAT, VERITAS and MAGIC telescopes. The radiation is emitted by a thermal ultra-relativistic electron plasma. The Cherenkov effect is derived from a Maxwell-Proca field with negative mass-square in a dispersive spacetime. The frequency variation of the tachyon mass results in exp(-betaˆomega) attenuation of the asymptotic Cherenkov energy flux, where betaˆ is a decay constant related to the electron temperature and rho is the frequency scaling exponent of the tachyon mass. An exponent in the range 0<rho<1 can reproduce the observed subexponential decay of the energy flux. For the Crab pulsar, we find rho=0.81±0.02, inferred from the substantially weaker-than-exponential decay of its spectral tail measured by MAGIC over an extended energy range. The scaling exponent rho determines whether the group velocity of the tachyonic gamma-rays is sub- or superluminal.
95.30.Gv Radiation mechanisms; polarization
41.60.Bq Cherenkov radiation
97.60.Gb Pulsars
52.27.Ny Relativistic plasmas
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Title: |
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Tachyonic quantum densities of relativistic electron plasmas: Cherenkov spectra of gamma-ray pulsars |
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Authors: |
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Tomaschitz, Roman |
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Affiliation: |
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AA(Department of Physics, Hiroshima University, 1-3-1 Kagami-yama, Higashi-Hiroshima 739-8526, Japan 0000-0001-8735-4503) |
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Publication: |
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Physics Letters A, Volume 378, Issue 32-33, p. 2337-2344. |
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Publication Date: |
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06/2014 |
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Origin: |
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Abstract Copyright: |
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(c) 2014 Elsevier B.V. |
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DOI: |
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Bibliographic Code: |
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description: Roman Tomaschitz (2014) Tachyonic quantum densities of relativistic electron plasmas: Cherenkov spectra of gamma-ray pulsars, Phys. Lett. A 378, 2337.
Keywords: quantized tachyonic Cherenkov densities, frequency-dependent tachyon mass, superluminal radiation in a permeable spacetime, transversal and longitudinal energy flux, tachyonic spectral fits to gamma-ray pulsars, subexponential Weibull decay of spectral tails, absolute spacetime, aether, radiation modes with negative mass-square, tachyonic Maxwell-Proca fields, tachyonic field strengths and inductions, tachyons in a dispersive spacetime, relativistic electron plasma, spectral asymptotics of tachyonic Cherenkov flux, Crab pulsar, PSR J1836+5925, PSR J0007+7303, PSR J2021+4026
Highlights
Quantized tachyonic Cherenkov densities lead to subexponential spectral decay.
Gamma-ray spectral fits to Crab pulsar, PSR J1836+5925, PSR J0007+7303, PSR J2021+4026.
The polarization of gamma-rays is analyzed in the quasiclassical regime and quantum limit.
Three degrees of polarization due to the negative mass-square of the Maxwell-Proca field.
Weibull decay of spectral tails caused by frequency scaling of the tachyon mass.
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