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Communication Dans Un Congrès Année : 2019

Parker Solar Probe Observations of Magnetic Reconnection Exhausts during Encounter 1

T. Phan
S. D. Bale
  • Fonction : Auteur
J. P. Eastwood
  • Fonction : Auteur
M. Pulupa
M. L. Stevens
  • Fonction : Auteur
R. J. Macdowall
  • Fonction : Auteur
A. W. Case
  • Fonction : Auteur
D. E. Larson
  • Fonction : Auteur
J. C. Kasper
  • Fonction : Auteur
P. L. Whittlesey
  • Fonction : Auteur
A. Szabo
K. E. Korreck
  • Fonction : Auteur
J. W. Bonnell
  • Fonction : Auteur
J. F. Drake
  • Fonction : Auteur
K. Goetz
P. Harvey
T. S. Horbury
  • Fonction : Auteur
E. Lehman
  • Fonction : Auteur
R. Livi
D. Malaspina
M. Oieroset
  • Fonction : Auteur
K. Paulson
J. Phan
  • Fonction : Auteur
M. A. Shay
  • Fonction : Auteur
M. Velli
B. Weschler
  • Fonction : Auteur

Résumé

Magnetic reconnection in current sheets converts magnetic energy into particle energy. It has been suggested that reconnection may therefore play an important role in the heating of the solar wind close to the Sun. Observations from Parker Solar Probe (PSP) provide a new opportunity to study this problem, as it measures the solar wind in situ at unprecedented distances to the Sun. During the 1st orbit, PSP encountered a large number of current sheets in the solar wind through perihelion at 35.7 solar radii. We have performed a comprehensive survey of these current sheets and found clear evidence for reconnection exhausts in a variety of phenomena including (1) Heliospheric current sheets, (2) coronal mass ejections, (3) small flux ropes, and (4) regular solar wind. However, we find that the majority of the current sheets encountered around the closest approach to the Sun were mostly Alfvenic structures associated with bursty radial jets. Although it has been suggested that these Alfvenic structures may be driven by reconnection lower in the corona, the majority of these current sheets do not appear to be undergoing local reconnection. We will show sample examples of reconnection in the aforementioned phenomena, and discuss why some current sheets reconnect, while others do not. The PSP findings could help reveal the key conditions that control the presence or absence of reconnection in current sheets.
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Dates et versions

hal-03562474 , version 1 (09-02-2022)

Identifiants

Citer

T. Phan, S. D. Bale, J. P. Eastwood, B. Lavraud, M. Pulupa, et al.. Parker Solar Probe Observations of Magnetic Reconnection Exhausts during Encounter 1. American Geophysical Union, 2019, San Francisco, United States. ⟨hal-03562474⟩
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