Connecting Solar Wind Velocity Spikes Measured by Solar Orbiter and Coronal Brightenings Observed by SDO

被引：2

作者：

Hou, Chuanpeng ^{[1
,2
]}

Rouillard, Alexis P. ^{[2
]}

He, Jiansen ^{[1
]}

Gannouni, Bahaeddine ^{[2
]}

Reville, Victor ^{[2
]}

Louarn, Philippe ^{[2
]}

Fedorov, Andrey ^{[2
]}

Prech, Lubomir ^{[3
]}

Owen, Christopher J. ^{[4
]}

Verscharen, Daniel ^{[4
]}

D'Amicis, Raffaella ^{[5
]}

Sorriso-Valvo, Luca ^{[6
,7
]}

Fargette, Nais ^{[8
]}

Coburn, Jesse ^{[4
,9
]}

Genot, Vincent ^{[2
]}

Raines, Jim M. ^{[10
]}

Bruno, Roberto ^{[5
]}

Livi, Stefano ^{[11
]}

Lavraud, Benoit ^{[2
,12
]}

Andre, Nicolas ^{[2
,13
]}

Fruit, Gabriel ^{[2
]}

Kieokaew, Rungployphan ^{[2
]}

Plotnikov, Illya ^{[2
]}

Penou, Emmanuel ^{[2
]}

Barthe, Alain ^{[15
]}

Kataria, Dhiren ^{[11
]}

Berthomier, Matthieu ^{[16
]}

Allegrini, Frederic ^{[11
,14
]}

Fortunato, Vito ^{[17
]}

Mele, Gennaro ^{[18
]}

Horbury, Timothy ^{[8
]}

机构：

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

[2] Univ Toulouse III Paul Sabatier, IRAP, CNRS, CNES, Toulouse, France

[3] Charles Univ Prague, Fac Math & Phys, V Holesovickach 2, Prague 8, Czech Republic

[4] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, England

[5] Ist Astrofis & Planetol Spaziali, INAF, Via Fosso Cavaliere 100, I-00133 Rome, Italy

[6] Inst Sci & Technol Plasmas, Natl Res Council, Via Amendola 122-D, I-70126 Bari, Italy

[7] KTH Royal Inst Technol, Sch Elect Engn & Comp Sci, Space & Plasma Phys Div, Tekn ringen 31, Stockholm, Sweden

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

[9] Space Sci Inst, 4765 Walnut St,Suite B, Boulder, CO 80301 USA

[10] Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI USA

[11] Southwest Res Inst, 6220 Culebra Rd, San Antonio, TX 78238 USA

[12] Univ Bordeaux, Lab Astrophys Bordeaux, CNRS, Pessac, France

[13] Univ Toulouse, Inst Super Aeronaut & Espace ISAE SUPAERO, Toulouse, France

[14] Univ Texas San Antonio, Dept Phys & Astron, San Antonio, TX USA

[15] AKKA, Toulouse, France

[16] Ecole Polytech, Lab Phys Plasmas, Palaiseau, France

[17] Planetek Italia Srl, Via Massaua 12, I-70132 Bari BA, Italy

[18] Leonardo, Viale lavoro 101, I-74123 Taranto, Italy

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2024年 / 968卷 / 02期

基金：

英国科学技术设施理事会;

关键词：

X-RAY JETS; MAGNETIC SWITCHBACKS; ALFVEN WAVES; SUN; RECONNECTION; EVOLUTION; ORIGIN; MICROSTREAMS; GENERATION; PROBE;

D O I：

10.3847/2041-8213/ad4eda

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Parker Solar Probe's discovery that magnetic switchbacks and velocity spikes in the young solar wind are abundant has prompted intensive research into their origin(s) and formation mechanism(s) in the solar atmosphere. Recent studies, based on in situ measurements and numerical simulations, argue that velocity spikes are produced through interchange magnetic reconnection. Our work studies the relationship between interplanetary velocity spikes and coronal brightenings induced by changes in the photospheric magnetic field. Our analysis focuses on the characteristic periodicities of velocity spikes detected by the Proton Alpha Sensor on the Solar Orbiter during its fifth perihelion pass. Throughout the time period analyzed here, we estimate their origin along the boundary of a coronal hole. Around the boundary region, we identify periodic variations in coronal brightening activity observed by the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory. The spectral characteristics of the time series of in situ velocity spikes, remote coronal brightenings, and remote photospheric magnetic flux exhibit correspondence in their periodicities. Therefore, we suggest that the localized small-scale magnetic flux within coronal holes fuels a magnetic reconnection process that can be observed as slight brightness augmentations and outward fluctuations or jets. These dynamic elements may act as mediators, bonding magnetic reconnection with the genesis of velocity spikes and magnetic switchbacks.

引用

页数：9

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