Alfvenic turbulence generated by the interstellar pickup protons in the outer heliosphere

Gamayunov, K.; Zhang, M.; Pogorelov, N.; Heerikhuisen, J.; Rassoul, H.

doi:10.1063/1.4811015

Title: Alfvenic turbulence generated by the interstellar pickup protons in the outer heliosphere

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Abstract

Here a self-consistent model of the interstellar pickup protons, slab component of the Alfvénic turbulence, and core solar wind protons is presented for r ≤ 1 AU along with the initial results and comparison with the Voyager 2 (V2) observations. A fraction of the pickup proton free energy, f_D, which is actually released in the wave form during isotropization, is taken from the quasi-linear consideration without preexisting turbulence. Whereas we use observations to specify a strength of the large scale driving, C_sh, for turbulence. Our results show that for C_sh ≈ 1 - 1.5 and f_D ≈ 0.7 - 1, the model slab component agrees well with the V2 observations of the total transverse magnetic fluctuations starting from ~8 AU. Finally, this finding agrees with the result by Oughton et al. [17] where they also showed that the slab component dominates the two-dimensional component at the heliocentric distances beyond ~ 10 AU. So it is likely that the slab component at low-latitudes makes up a majority of the transverse magnetic fluctuations beyond 8 - 10 AU.

Authors:

Gamayunov, K. ^[1]; Zhang, M. ^[1]; Pogorelov, N. ^[2]; Heerikhuisen, J. ^[2]; Rassoul, H. ^[1]

Florida Inst. of Technology, Melbourne, FL (United States). Dept. of Physics and Space Sciences
Univ. of Alabama, Huntsville, AL (United States). Center for Space Physics and Aeronomic Research (CSPAR), Dept. of Physics

Publication Date:: 2013-06-13

Research Org.:: Univ. of Alabama, Huntsville, AL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

OSTI Identifier:: 1326062

Grant/Contract Number:: SC0008334; NNX09AG29G; NNX09AB24G; NNX09AG63G; NNX12AB30G; AGS-1156056; AGS-1203516

Resource Type:: Accepted Manuscript

Journal Name:: AIP Conference Proceedings

Additional Journal Information:: Journal Volume: 1539; Journal Issue: 1; Conference: SOLAR WIND 13: Proceedings of the Thirteenth International Solar Wind Conference., Big Island, HI (United States), 17-22 Jun 2012; Journal ID: ISSN 0094-243X

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 79 ASTRONOMY AND ASTROPHYSICS; Interplanetary medium; Solar wind; Sun: heliosphere; Turbulence; Waves

Citation Formats


                    Gamayunov, K., Zhang, M., Pogorelov, N., Heerikhuisen, J., and Rassoul, H. Alfvenic turbulence generated by the interstellar pickup protons in the outer heliosphere.  United States: N. p., 2013. 
Web.  doi:10.1063/1.4811015.

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                    Gamayunov, K., Zhang, M., Pogorelov, N., Heerikhuisen, J., & Rassoul, H. Alfvenic turbulence generated by the interstellar pickup protons in the outer heliosphere.  United States.  https://doi.org/10.1063/1.4811015

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                    Gamayunov, K., Zhang, M., Pogorelov, N., Heerikhuisen, J., and Rassoul, H. Thu .  
"Alfvenic turbulence generated by the interstellar pickup protons in the outer heliosphere".  United States.  https://doi.org/10.1063/1.4811015.  https://www.osti.gov/servlets/purl/1326062.

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@article{osti_1326062,

  title        = {Alfvenic turbulence generated by the interstellar pickup protons in the outer heliosphere},

  author       = {Gamayunov, K. and Zhang, M. and Pogorelov, N. and Heerikhuisen, J. and Rassoul, H.},

  abstractNote = {Here a self-consistent model of the interstellar pickup protons, slab component of the Alfvénic turbulence, and core solar wind protons is presented for r ≤ 1 AU along with the initial results and comparison with the Voyager 2 (V2) observations. A fraction of the pickup proton free energy, fD, which is actually released in the wave form during isotropization, is taken from the quasi-linear consideration without preexisting turbulence. Whereas we use observations to specify a strength of the large scale driving, Csh, for turbulence. Our results show that for Csh ≈ 1 - 1.5 and fD ≈ 0.7 - 1, the model slab component agrees well with the V2 observations of the total transverse magnetic fluctuations starting from ~8 AU. Finally, this finding agrees with the result by Oughton et al. [17] where they also showed that the slab component dominates the two-dimensional component at the heliocentric distances beyond ~ 10 AU. So it is likely that the slab component at low-latitudes makes up a majority of the transverse magnetic fluctuations beyond 8 - 10 AU.},

  doi          = {10.1063/1.4811015},

  journal      = {AIP Conference Proceedings},

  number       = 1,

  volume       = 1539,

  place        = {United States},

  year         = {2013},

  month        = {6}

}

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