Results 101 to 110 of about 41,536 (207)

X-ray imaging of flare loops and coronal arches [PDF]

HXIS (Hard X-ray Imaging Spectrometer) results related to preflare, flare-decay, and post-flare phases in the solar corona are summarized. Particularly discussed are miniflares, long-lived X-ray enhancements along filament channels, flare precursors ...
Svestka, Z.
core   +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

Solar activity cycle variation of the K corona

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

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

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 Error Estimation of Transverse Coronal Loop Oscillation Parameters Based on Least Chi-squares Fitting

The Astrophysical Journal Supplement Series
Transverse oscillations of coronal loops not only influence coronal dynamics, but also provide a new perspective for coronal detection. To enhance their exploitation and utilization, accurately estimating the oscillation parameters is crucial.
Hongbo Li, Hengqiang Feng, Zhanjun Tian, Qiangwei Cai, Guoqing Zhao, Yan Zhao   +5 more
doaj   +1 more source

Coronal and chromospheric physics [PDF]

Achievements and completed results are discussed for investigations covering solar activity during the solar maximum mission and the solar maximum year; other studies of solar activity and variability; infrared and submillimeter photometry; solar-related
Jefferies, J. T., Landman, D. A., Orrall, F. Q.   +2 more
core   +1 more source