Enhanced Energy Transfer Rate in Solar Wind Turbulence Observed near the Sun from Parker Solar Probe

被引：65

作者：

Bandyopadhyay, Riddhi ^{[1
]}

Goldstein, M. L. ^{[2
,3
]}

Maruca, B. A. ^{[1
]}

Matthaeus, W. H. ^{[1
]}

Parashar, T. N. ^{[1
]}

Ruffolo, D. ^{[4
]}

Chhiber, R. ^{[1
,2
]}

Usmanov, A. ^{[1
,2
]}

Chasapis, A. ^{[5
]}

Qudsi, R. ^{[1
]}

Bale, Stuart D. ^{[6
,7
,8
,9
]}

Bonnell, J. W. ^{[7
]}

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

Goetz, Keith ^{[12
]}

Harvey, Peter R. ^{[7
]}

MacDowall, Robert J. ^{[13
]}

Malaspina, David M. ^{[14
]}

Pulupa, Marc ^{[7
]}

Kasper, J. C. ^{[15
,16
]}

Korreck, K. E. ^{[16
]}

Case, A. W. ^{[16
]}

Stevens, M. ^{[16
]}

Whittlesey, P. ^{[17
]}

Larson, D. ^{[17
]}

Livi, R. ^{[17
]}

Klein, K. G. ^{[18
]}

Velli, M. ^{[19
]}

Raouafi, N. ^{[20
]}

机构：

[1] Univ Delaware, Bartol Res Inst, Dept Phys & Astron, Newark, DE 19716 USA

[2] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[3] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA

[4] Mahidol Univ, Fac Sci, Dept Phys, Bangkok 10400, Thailand

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

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

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

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

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

[10] CNRS, LPC2E, Orleans, France

[11] Univ Orleans, Orleans, France

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

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

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

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

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

[17] Univ Calif Berkeley, Berkeley, CA 94720 USA

[18] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85719 USA

[19] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA 90095 USA

[20] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA

来源：

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES | 2020年 / 246卷 / 02期

关键词：

MAGNETOHYDRODYNAMIC TURBULENCE; CONSEQUENCES; FLUCTUATIONS; DISSIPATION; LATITUDE; CASCADE; HELIUM; LENGTH; WAVES;

D O I：

10.3847/1538-4365/ab5dae

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Direct evidence of an inertial-range turbulent energy cascade has been provided by spacecraft observations in heliospheric plasmas. In the solar wind, the average value of the derived heating rate near 1 au is similar to 10(3) J kg(-1) s(-1), an amount sufficient to account for observed departures from adiabatic expansion. Parker Solar Probe, even during its first solar encounter, offers the first opportunity to compute, in a similar fashion, a fluid-scale energy decay rate, much closer to the solar corona than any prior in situ observations. Using the Politano-Pouquet third-order law and the von Karman decay law, we estimate the fluid-range energy transfer rate in the inner heliosphere, at heliocentric distance R ranging from 54 R-circle dot (0.25 au) to 36 R-circle dot (0.17 au). The energy transfer rate obtained near the first perihelion is about 100 times higher than the average value at 1 au, which is in agreement with estimates based on a heliospheric turbulence transport model. This dramatic increase in the heating rate is unprecedented in previous solar wind observations, including those from Helios, and the values are close to those obtained in the shocked plasma inside the terrestrial magnetosheath.

引用

页数：9

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