Solar Wind Streams and Stream Interaction Regions Observed by the Parker Solar Probe with Corresponding Observations at 1 au - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue The Astrophysical Journal Supplement Année : 2020

Solar Wind Streams and Stream Interaction Regions Observed by the Parker Solar Probe with Corresponding Observations at 1 au

G.M. Mason
  • Fonction : Auteur
S.D. Bale
  • Fonction : Auteur
E.R. Christian
  • Fonction : Auteur
K. Goetz
M.E. Hill
  • Fonction : Auteur
J.C. Kasper
  • Fonction : Auteur
K.E. Korreck
  • Fonction : Auteur
D. Larson
R. Livi
R.J Macdowall
  • Fonction : Auteur
D.M. Malaspina
  • Fonction : Auteur
D.J. Mccomas
  • Fonction : Auteur
R. L Mcnutt
  • Fonction : Auteur
D.G. Mitchell
  • Fonction : Auteur
M. Pulupa
N. Raouafi
  • Fonction : Auteur
N. Schwadron
M.L. Stevenson
  • Fonction : Auteur
P.L. Whittlesey
  • Fonction : Auteur
M. Wiedenbeck
  • Fonction : Auteur

Résumé

Several fast solar wind streams and stream interaction regions (SIRs) were observed by the Parker Solar Probe (PSP) during its first orbit (2018 September-2019 January). During this time, several recurring SIRs were also seen at 1 au at both L1 (Advanced Composition Explorer (ACE) and Wind) and the location of the Solar Terrestrial Relations Observatory-Ahead (STEREO-A). In this paper, we compare four fast streams observed by PSP at different radial distances during its first orbit. For three of these fast stream events, measurements from L1 (ACE and Wind) and STEREO-A indicated that the fast streams were observed by both PSP and at least one of the 1 au monitors. Our associations are supported by simulations made by the ENLIL model driven by GONG-(ADAPT-) WSA, which allows us to contextualize the inner heliospheric conditions during the first orbit of PSP. Additionally, we determine which of these fast streams are associated with an SIR and characterize the SIR properties for these events. From these comparisons, we find that the compression region associated with the fast-speed streams overtaking the preceding solar wind can form at various radial distances from the Sun in the inner heliosphere inside 0.5 au, with the suprathermal ion population (energies between 30 and 586 keV) observed as isolated enhancements suggesting localized acceleration near the SIR stream interface at similar to 0.3 au, which is unlike those seen at 1 au, where the suprathermal enhancements extend throughout and behind the SIR. This suprathermal enhancement extends further into the fast stream with increasing distance from the Sun.
Fichier principal
Vignette du fichier
Allen_2020_ApJS_246_36.pdf (25.02 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

insu-02934731 , version 1 (17-09-2020)

Licence

Paternité - Pas de modifications

Identifiants

Citer

R. C. Allen, D. Lario, D. Odstrcil, G.C. Ho, L.K. Jian, et al.. Solar Wind Streams and Stream Interaction Regions Observed by the Parker Solar Probe with Corresponding Observations at 1 au. The Astrophysical Journal Supplement, 2020, Early Results from Parker Solar Probe: Ushering a New Frontier in Space Exploration, 246 (2), pp.36. ⟨10.3847/1538-4365/ab578f⟩. ⟨insu-02934731⟩
51 Consultations
45 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More