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Energy Supply for Heating the Slow Solar Wind Observed by Parker Solar Probe between 0.17 and 0.7 au
Alternative TitleWOS:000590719000001
Wu, Honghong; Tu, Chuanyi; Wang, Xin1; He, Jiansen; Yang, Liping2
Source PublicationASTROPHYSICAL JOURNAL LETTERS
2020
Volume904Issue:1Pages:L8
DOI10.3847/2041-8213/abc5b6
ISSN2041-8205
Language英语
KeywordSlow solar wind Interplanetary turbulence Solar coronal heating INTERPLANETARY ALFVENIC FLUCTUATIONS HIGH-SPEED STREAMS RADIAL EVOLUTION EQUATION TURBULENCE
AbstractEnergy supply sources for the heating process in the slow solar wind remain unknown. The Parker Solar Probe (PSP) mission provides a good opportunity to study this issue. Recently, PSP observations have found that the slow solar wind experiences stronger heating inside 0.24 au. Here for the first time we measure in the slow solar wind the radial gradient of the low-frequency breaks on the magnetic trace power spectra and evaluate the associated energy supply rate. We find that the energy supply rate is consistent with the observed perpendicular heating rate calculated based on the gradient of the magnetic moment. Based on this finding, one could explain why the slow solar wind is strongly heated inside 0.25 au but expands nearly adiabatically outside 0.25 au. This finding supports the concept that the energy added from the energy-containing range is transferred by an energy cascade process to the dissipation range, and then dissipates to heat the slow solar wind. The related issues for further study are discussed.
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/7542
Collection中国科学院国家空间科学中心
Affiliation1.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China
2.Beihang Univ, Sch Space & Environm, Beijing, Peoples R China
3.Chinese Acad Sci, Natl Space Sci Ctr, SIGMA Weather Grp, State Key Lab Space Weather, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wu, Honghong,Tu, Chuanyi,Wang, Xin,et al. Energy Supply for Heating the Slow Solar Wind Observed by Parker Solar Probe between 0.17 and 0.7 au[J]. ASTROPHYSICAL JOURNAL LETTERS,2020,904(1):L8.
APA Wu, Honghong,Tu, Chuanyi,Wang, Xin,He, Jiansen,&Yang, Liping.(2020).Energy Supply for Heating the Slow Solar Wind Observed by Parker Solar Probe between 0.17 and 0.7 au.ASTROPHYSICAL JOURNAL LETTERS,904(1),L8.
MLA Wu, Honghong,et al."Energy Supply for Heating the Slow Solar Wind Observed by Parker Solar Probe between 0.17 and 0.7 au".ASTROPHYSICAL JOURNAL LETTERS 904.1(2020):L8.
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