Strength of the spontaneously emitted collective aperiodic magnetic field fluctuations in the reionized early intergalactic medium

Schlickeiser, R.

doi:10.1088/0004-637X/778/1/39

Title: Strength of the spontaneously emitted collective aperiodic magnetic field fluctuations in the reionized early intergalactic medium

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Abstract

Nonmagnetized, fully ionized plasmas spontaneously emit aperiodic turbulent magnetic field fluctuations. Its fluctuation intensities are dominated by the contribution from a recently discovered collective, damped mode, which modifies the earlier estimate of the total magnetic field strength in a thermal nonrelativistic electron-proton plasma to |δB|=24β{sub e}{sup 1/4}(gn{sub e}m{sub e}c{sup 2}){sup 1/2} G, where g denotes the plasma parameter and β {sub e} the thermal electron velocity in units of the speed of light, in the case of no collisional damping. Accounting for simultaneous viscous damping reduces the estimate to |δB|{sub eq} = 2305g(n{sub e}m{sub e}c {sup 2}){sup 1/2} G, depending only on the plasma parameter g and the electron density n{sub e} . For the unmagnetized intergalactic medium, immediately after the reionization onset the field strengths from this mechanism are about 6.8 × 10{sup –13} G for no collisional damping and 1.5 × 10{sup –16} G for viscous damping. Maximum spatial scales of 10{sup 15} cm of the emitted aperiodic fluctuations in cosmic voids are possible.

Authors:: Schlickeiser, R.

Publication Date:: Wed Nov 20 00:00:00 EST 2013

OSTI Identifier:: 22342034

Resource Type:: Journal Article

Journal Name:: Astrophysical Journal

Additional Journal Information:: Journal Volume: 778; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X

Country of Publication:: United States

Language:: English

Subject:: 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCOUNTING; DAMPING; ELECTRON DENSITY; ELECTRONS; EMISSION; FLUCTUATIONS; MAGNETIC FIELDS; PLASMA; PROTONS; STARS; TURBULENCE; VELOCITY; VISIBLE RADIATION

Citation Formats


                    Schlickeiser, R., and Felten, T., E-mail: rsch@tp4.rub.de, E-mail: tim.felten@rub.de. Strength of the spontaneously emitted collective aperiodic magnetic field fluctuations in the reionized early intergalactic medium.  United States: N. p., 2013. 
        Web.  doi:10.1088/0004-637X/778/1/39.

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                    Schlickeiser, R., & Felten, T., E-mail: rsch@tp4.rub.de, E-mail: tim.felten@rub.de. Strength of the spontaneously emitted collective aperiodic magnetic field fluctuations in the reionized early intergalactic medium.  United States.  https://doi.org/10.1088/0004-637X/778/1/39

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                    Schlickeiser, R., and Felten, T., E-mail: rsch@tp4.rub.de, E-mail: tim.felten@rub.de. 2013.  
        "Strength of the spontaneously emitted collective aperiodic magnetic field fluctuations in the reionized early intergalactic medium".  United States.  https://doi.org/10.1088/0004-637X/778/1/39.

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@article{osti_22342034,

  title        = {Strength of the spontaneously emitted collective aperiodic magnetic field fluctuations in the reionized early intergalactic medium},

  author       = {Schlickeiser, R. and Felten, T., E-mail: rsch@tp4.rub.de, E-mail: tim.felten@rub.de},

  abstractNote = {Nonmagnetized, fully ionized plasmas spontaneously emit aperiodic turbulent magnetic field fluctuations. Its fluctuation intensities are dominated by the contribution from a recently discovered collective, damped mode, which modifies the earlier estimate of the total magnetic field strength in a thermal nonrelativistic electron-proton plasma to |δB|=24β{sub e}{sup 1/4}(gn{sub e}m{sub e}c{sup 2}){sup 1/2} G, where g denotes the plasma parameter and β {sub e} the thermal electron velocity in units of the speed of light, in the case of no collisional damping. Accounting for simultaneous viscous damping reduces the estimate to |δB|{sub eq} = 2305g(n{sub e}m{sub e}c {sup 2}){sup 1/2} G, depending only on the plasma parameter g and the electron density n{sub e} . For the unmagnetized intergalactic medium, immediately after the reionization onset the field strengths from this mechanism are about 6.8 × 10{sup –13} G for no collisional damping and 1.5 × 10{sup –16} G for viscous damping. Maximum spatial scales of 10{sup 15} cm of the emitted aperiodic fluctuations in cosmic voids are possible.},

  doi          = {10.1088/0004-637X/778/1/39},

  url          = {https://www.osti.gov/biblio/22342034},
  journal      = {Astrophysical Journal},

  issn         = {0004-637X},

  number       = 1,

  volume       = 778,

  place        = {United States},

  year         = {Wed Nov 20 00:00:00 EST 2013},

  month        = {Wed Nov 20 00:00:00 EST 2013}

}

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