Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence

被引：45

作者：

Bowen, Trevor A. ^{[1
]}

Mallet, Alfred ^{[1
]}

Bale, Stuart D. ^{[1
,2
,3
,4
]}

Bonnell, J. W. ^{[1
]}

Case, Anthony W. ^{[5
]}

Chandran, Benjamin D. G. ^{[6
,7
]}

Chasapis, Alexandros ^{[8
]}

Chen, Christopher H. K. ^{[4
]}

Duan, Die ^{[1
,9
]}

de Wit, Thierry Dudok ^{[10
,11
]}

Goetz, Keith ^{[12
]}

Halekas, Jasper S. ^{[13
]}

Harvey, Peter R. ^{[1
]}

Kasper, J. C. ^{[5
,14
]}

Korreck, Kelly E. ^{[5
]}

Larson, Davin ^{[1
]}

Livi, Roberto ^{[1
]}

MacDowall, Robert J. ^{[15
]}

Malaspina, David M. ^{[8
,16
]}

McManus, Michael D. ^{[1
,2
]}

Pulupa, Marc ^{[1
]}

Stevens, Michael ^{[5
]}

Whittlesey, Phyllis ^{[1
]}

机构：

[1] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Phys Dept, Berkeley, CA 94720 USA

[3] Imperial Coll London, Blackett Lab, London SW7 2AZ, England

[4] Queen Mary Univ London, Sch Phys & Astron, London E1 4NS, England

[5] Smithsonian Astrophys Observ, Cambridge, MA 02138 USA

[6] Univ New Hampshire, Dept Phys & Astron, Durham, NH 03824 USA

[7] Univ New Hampshire, Space Sci Ctr, Durham, NH 03824 USA

[8] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80303 USA

[9] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China

[10] CNRS, LPC2E, 3 Ave Rech Sci, F-45071 Orleans, France

[11] Univ Orleans, 3 Ave Rech Sci, F-45071 Orleans, France

[12] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA

[13] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

[14] Univ Michigan, Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA

[15] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA

[16] Univ Colorado, Astrophys & Planetary Sci Dept, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 02期

关键词：

SOLAR-WIND; ASTROPHYSICAL GYROKINETICS; MAGNETIC FLUCTUATIONS; KINETIC DISSIPATION; ALFVENIC TURBULENCE; WAVE; CASCADE; ACCELERATION; DYNAMICS; CORONA;

D O I：

10.1103/PhysRevLett.125.025102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We perform a statistical study of the turbulent power spectrum at inertial and kinetic scales observed during the first perihelion encounter of the Parker Solar Probe. We find that often there is an extremely steep scaling range of the power spectrum just above the ion-kinetic scales, similar to prior observations at 1 A.U., with a power-law index of around -4. Based on our measurements, we demonstrate that either a significant (>50%) fraction of the total turbulent energy flux is dissipated in this range of scales, or the characteristic nonlinear interaction time of the turbulence decreases dramatically from the expectation based solely on the dispersive nature of nonlinearly interacting kinetic Alfven waves.

引用

页数：8

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