Modelling of relativistic ion-acoustic waves in ultra-degenerate plasmas

Haas, Fernando

doi:10.1017/s0022377816001100

Cited by 16 publications

(16 citation statements)

References 30 publications

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“…where n 0 is the equilibrium electron number density,h is the reduced Planck constant, and p F =h(3π 2 n 0 ) 1/3 is the electron Fermi momentum, yielding the specific enthalpy H = dP/(m e c 2 n e ) = 1 + ζ 2 , responsible for the relativistic electron mass increase due to a high Fermi velocity. It is important to note that the Chandrasekhar equation of state gives a linear dispersion for ion-acoustic waves in the absence of neutrinos, which agrees with the result from the relativistic Vlasov equation, in the long-wavelength limit [17]. In addition, magnetized plasmas can be treated by simply including the magnetic force on electrons and ions [15].…”

Section: Basic Modelsupporting

confidence: 73%

Neutrino oscillations and instabilities in degenerate relativistic astrophysical plasmas

Haas

2019

Phys. Rev. E

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We set up a proposal to extend significantly recent works on neutrino-plasma interaction, allowing the possibility of deep degenerate and relativistic electrons, which are often present in compact stars such as high-density white dwarfs. The methodology involves the covariant hydrodynamic formulation of ultradense plasmas. We propose the generalization of previous studies, on the interaction between ion-acoustic waves and resonant neutrino flavor oscillations in a mixed neutrino beam, admitting degenerate and relativistic electron populations. Destabilization of the ion acoustic wave has higher growth rates, thanks to the very high densities present in plasmas under these extreme conditions. We take into account applications to white dwarf stars in the process of collapsing, producing type II supernovas.

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Section: Basic Modelsupporting

confidence: 73%

Neutrino oscillations and instabilities in degenerate relativistic astrophysical plasmas

Haas

2019

Phys. Rev. E

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“…We note that in above dispersion relation, the quantum effects (like recoil and pair creation) are neglected [30,32,33].…”

Section: Introductionmentioning

confidence: 99%

Nonlinear coupling of electromagnetic and electron acoustic waves in multi-species degenerate astrophysical plasma

2020

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Nonlinear wave-coupling is studied in a multi-species degenerate astrophysical plasma consisting of two electron species (at different temperatures): a highly degenerate main component plus a smaller classical relativistic flow immersed in a static neutralizing ion background. It is shown that the high frequency electromagnetic (HF EM) waves, through their strong nonlinear interactions with the electron-acoustic waves (sustained by a multi-electron component (degenerate) plasma surrounding a compact astrophysical object) can scatter to lower frequencies so that the radiation observed faraway will be spectrally shifted downwards. It is also shown that, under definite conditions, the EM waves could settle into stationary Solitonic states. It is expected that the effects of such structures may persist as detectable signatures in forms of modulated micro-pulses in the radiation observed far away from the accreting compact object. Both these effects will advance our abilities to interpret the radiation coming out of the compact objects.

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“…To study the problem of the nonlinear self-guiding of the EM beam in a highly transparent electron plasma we apply Eqs. (1)(2)(3)(4), which for the generalized momentum Π =Gp and relativistic factor Γ = Gγ reduce to the following set of dimensionless equations…”

Section: Main Considerationmentioning

confidence: 99%