Coronal Heating Rate in the Slow Solar Wind

Author:

Telloni DanieleORCID,Romoli MarcoORCID,Velli MarcoORCID,Zank Gary P.ORCID,Adhikari LaxmanORCID,Downs CooperORCID,Burtovoi AleksandrORCID,Susino RobertoORCID,Spadaro DanieleORCID,Zhao LinglingORCID,Liberatore AlessandroORCID,Shi ChenORCID,De Leo YaraORCID,Abbo LuciaORCID,Frassati FedericaORCID,Jerse GiovannaORCID,Landini FedericoORCID,Nicolini GianalfredoORCID,Pancrazzi MaurizioORCID,Russano GiulianaORCID,Sasso ClementinaORCID,Andretta VincenzoORCID,Da Deppo VaniaORCID,Fineschi SilvanoORCID,Grimani CatiaORCID,Heinzel PetrORCID,Moses John D.ORCID,Naletto GiampieroORCID,Stangalini MarcoORCID,Teriaca LucaORCID,Uslenghi MichelaORCID,Berlicki ArkadiuszORCID,Bruno RobertoORCID,Capobianco GerardoORCID,Capuano Giuseppe E.ORCID,Casini ChiaraORCID,Casti MartaORCID,Chioetto PaoloORCID,Corso Alain J.ORCID,D’Amicis RaffaellaORCID,Fabi MicheleORCID,Frassetto FabioORCID,Giarrusso MarinaORCID,Giordano SilvioORCID,Guglielmino Salvo L.ORCID,Magli EnricoORCID,Massone GiuseppeORCID,Messerotti MauroORCID,Nisticò GiuseppeORCID,Pelizzo Maria G.ORCID,Reale FabioORCID,Romano PaoloORCID,Schühle UdoORCID,Solanki Sami K.ORCID,Straus ThomasORCID,Ventura RitaORCID,Volpicelli Cosimo A.ORCID,Zangrilli LucaORCID,Zimbardo GaetanoORCID,Zuppella PaolaORCID,Bale Stuart D.ORCID,Kasper Justin C.ORCID

Abstract

Abstract This Letter reports the first observational estimate of the heating rate in the slowly expanding solar corona. The analysis exploits the simultaneous remote and local observations of the same coronal plasma volume, with the Solar Orbiter/Metis and the Parker Solar Probe instruments, respectively, and relies on the basic solar wind magnetohydrodynamic equations. As expected, energy losses are a minor fraction of the solar wind energy flux, since most of the energy dissipation that feeds the heating and acceleration of the coronal flow occurs much closer to the Sun than the heights probed in the present study, which range from 6.3 to 13.3 R . The energy deposited to the supersonic wind is then used to explain the observed slight residual wind acceleration and to maintain the plasma in a nonadiabatic state. As derived in the Wentzel–Kramers–Brillouin limit, the present energy transfer rate estimates provide a lower limit, which can be very useful in refining the turbulence-based modeling of coronal heating and subsequent solar wind acceleration.

Funder

Agenzia Spaziale Italiana

Publisher

American Astronomical Society

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 6 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Near Subsonic Solar Wind Outflow from an Active Region;The Astrophysical Journal;2024-08-29

2. Thermodynamics of Alfvénic slow solar wind produced by Alfvénic turbulence;Monthly Notices of the Royal Astronomical Society;2024-07-17

3. Solar Cycle Dependence of the Turbulence Cascade Rate at 1 au;The Astrophysical Journal;2024-06-01

4. Assessing the Performance of the ADAPT and AFT Flux Transport Models Using In Situ Measurements from Multiple Satellites;The Astrophysical Journal;2024-03-29

5. Coronal heating;Magnetohydrodynamic Processes in Solar Plasmas;2024

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