Results 101 to 110 of about 10,701,163 (203)

Solar activity cycle variation of the K corona

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

Observational Evidence of Solar Spicules Associated with Microfilament Eruptions Using DKIST

The Astrophysical Journal Letters
The formation mechanism of spicules is fundamentally important for understanding mass and energy transport from the chromosphere into the corona. Recent studies suggested that spicules may be powered by microfilament eruptions.
Qifan Dong, Xiaoli Yan, Zhike Xue, Liheng Yang, Jincheng Wang, Yadan Duan, Zhe Xu, Yian Zhou, Xinsheng Zhang, Zongyin Wu, Guotang Wu   +10 more
doaj   +1 more source

The origin and dynamic interaction of solar magnetic fields [PDF]

, 2008
The dynamics of the solar corona are dominated by the magnetic field which creates its structure. The magnetic field in most of the corona is ‘frozen’ to the plasma very effectively.
Wilmot-Smith, A.L.
core   +1 more source

Sun–Earth System Under Extreme Solar Stress: Corona Hole Dynamics and N–K Model Interpretation

Title: Sun–Earth System Under Extreme Solar Stress: Corona Hole Dynamics and N–K Model Interpretation   Description: This publication presents an urgent and prophetic analysis of the current extraordinary transformations on the Sun—specifically the collapse of sunspots and the formation of massive coronal holes—through the lens of the N–K ...
openaire   +2 more sources

Photometry of the solar corona of March 7, 1970

, 1973
Isophotes obtained by equidensitometry techniques from four exposures of the March 7, 1970 corona are used for derivation of intensity distributions along the equator, poles, streamers and dark 'gaps' in the visible corona.
Bappu, M. K. V., Bhattacharyya, J. C., Sivaraman, K. R.   +2 more
core   +1 more source

Photospheric Hot Spots at Solar Coronal Loop Footpoints Revealed by Hyperspectral Imaging Observations

The Astrophysical Journal
Poynting flux generated by random shuffling of photospheric magnetic footpoints is transferred through the upper atmosphere of the Sun where the plasma is heated to over 1 MK in the corona.
L. P. Chitta, M. van Noort, H. N. Smitha, E. R. Priest, L. H. M. Rouppe van der Voort   +4 more
doaj   +1 more source

Chaotic Motion of Ions in Finite-amplitude Low-frequency Alfvén Waves

The Astrophysical Journal
Finite-amplitude low-frequency Alfvén waves (AWs) are ubiquitous in space plasmas, where they play a key role in the transport and dissipation of energy, particularly in the heating of ions in the solar corona and solar wind.
Jingyu Peng, Jiansen He, Rong Lin
doaj   +1 more source

Current sheet magnetic model for the solar corona [PDF]

, 1971
Current sheet magnetic model to calculate quiet large-scale magnetic field in solar corona compared with accuracy of other ...
Schatten, K. H.
core  

An Elemental Abundance Diagnostic for Coordinated Solar Orbiter/SPICE and Hinode/EIS Observations

The Astrophysical Journal
Plasma composition measurements are a vital tool for the success of current and future solar missions, but density- and temperature-insensitive spectroscopic diagnostic ratios are sparse, and their underlying accuracy in determining the magnitude of the ...
David H. Brooks, Harry P. Warren, Deborah Baker, Sarah A. Matthews, Stephanie L. Yardley   +4 more
doaj   +1 more source

Ubiquitous Small-scale Extreme-ultraviolet Upflow-like Events above Network Regions Observed by the Solar Orbiter/Extreme Ultraviolet Imager

The Astrophysical Journal
Universal small-scale solar activity in the quiet region is suggested to be a potential source of solar wind and the upper solar atmosphere. Here, with the high-resolution 174 Å imaging observations from the Solar Orbiter/Extreme Ultraviolet Imager, we ...
Yadan Duan, Hechao Chen, Zhenyong Hou, Zheng Sun, Yuandeng Shen   +4 more
doaj   +1 more source