Results 81 to 90 of about 2,148 (181)

Analysis of WISPR Images of the Near-Sun Heliospheric Current Sheet Region from Parker Solar Probe Encounters 4 and 5 and Comparison with the in Situ Observations

The Astrophysical Journal
We present an analysis of Wide-field Imager for Solar PRobe (WISPR) images of the near-Sun heliospheric current sheet (HCS) region from the Parker Solar Probe (PSP) in 2020 January and June.
Paulett C. Liewer, Samuel T. Badman, Mark Linton, T. D. Phan, Guillermo Stenborg, Angelos Vourlidas   +5 more
doaj   +1 more source

Exploring the Origin of Solar Energetic Electrons. II. Investigating Turbulent Coronal Acceleration

The Astrophysical Journal
Nonthermal particle acceleration in the solar corona is evident from both remote hard X-ray sources in the chromosphere and direct in situ detection in the heliosphere.
Ross Pallister, Natasha L. S. Jeffrey, Morgan Stores   +2 more
doaj   +1 more source

The Role of Farside Magnetic Structures in Modeling the 2024 Solar Eclipse

The Astrophysical Journal
The corona is a crucial region that connects the solar surface to the solar wind and serves as the primary site of solar activity. The 2024 total solar eclipse (TSE) provides a unique opportunity to investigate the large-scale coronal structure. Combined
Guanglu Shi, Jiahui Shan, Li Feng, Jun Chen, Weiqun Gan   +4 more
doaj   +1 more source

Generalized Coronal Loop Scaling Laws and Their Implication for Turbulence in Solar Active Region Loops

The Astrophysical Journal
Recent coronal loop modeling has emphasized the importance of combining both Coulomb collisions and turbulent scattering to characterize field-aligned thermal conduction, which invokes a hybrid loop model.
Y. Dai, J. J. Xiang, M. D. Ding
doaj   +1 more source

High-resolution Imaging of the Magnetic Reconfiguration of the Corona from inside the Corona by WISPR on Parker Solar Probe

The Astrophysical Journal Letters
During the 22nd perihelion of Parker Solar Probe at 9.86 solar radii on 2024 December 24, the WISPR telescope captured a detailed sequence of events marking the return of open magnetic flux back to the Sun via the heliospheric current sheet (HCS ...
Angelos Vourlidas, Evangelos Paouris, Mark G. Linton, Guillermo Stenborg, Paulett C. Liewer, Pete Riley, Phillip Hess, Russell A. Howard, Nour E. Raouafi   +8 more
doaj   +1 more source

Solar activity cycle variation of the K corona

The Astrophysical Journal, 1984
R. Fisher, D. G. Sime
openaire   +1 more source

Secular variations in the solar corona shape according to observations during a solar activity minimum epoch

, 2008
Analysis of the solar corona structure during the periods of minimum solar activity from 1867 till 2006 has been carried out. A new flattening index for the large coronal streamers has been proposed. It has been shown that the index has been smoothly changing during the last 140 years.
openaire   +2 more sources

The Behaviour of the EUV Corona Before Flares in Regions with High Free Magnetic Energy. [PDF]

Sol Phys
Harra L, Kusano K, Zhu Y, Barczynski K, De-Sassi A, Stiefel MZ, Kontogiannis I, West MJ, Brooks DH.   +8 more
europepmc   +1 more source

The Sun as a driver of the inner heliosphere: Modern investigations of fundamental plasma processes. [PDF]

Nat Commun
Ervin T, Nakhleh AJ, Bharati Das S.
europepmc   +1 more source

Revealing Flare Energetics and Dynamics with SDO EVE Solar Extreme Ultraviolet Spectral Irradiance Observations. [PDF]

Sol Phys
Woods TN, Chamberlin PC, Jones A, Mason JP, Qian L, Warren HP, Woodraska D, Borelli R, Eparvier FG, Gonzalez G.   +9 more
europepmc   +1 more source