Results 91 to 100 of about 11,319 (196)

Modeling Time-variable Elemental Abundances in Coronal Loop Simulations

The Astrophysical Journal Letters
Numerous recent X-ray observations of coronal loops in both active regions and solar flares have shown clearly that elemental abundances vary with time.
Jeffrey W. Reep, John Unverferth, Will T. Barnes, Sherry Chhabra   +3 more
doaj   +1 more source

Unprecedented Fine Structure of a Solar Flare Revealed by the 1.6~m New Solar Telescope

, 2016
Solar flares signify the sudden release of magnetic energy and are sources of so called space weather. The fine structures (below 500 km) of flares are rarely observed and are accessible to only a few instruments world-wide.
Cao, Wenda, Gary, Dale, Jing, Ju, Liu, Chang, Wang, Haimin, Xu, Yan   +5 more
core   +1 more source

Coronal Heating from Alfvén Wave Turbulence in Solar Coronal Loops

, 2020
This work is supported by the NSF-REU Solar Physics program at SAO, grant number AGS-1850750.
openaire   +1 more source

SWAP Observations of Post-flare Giant Arches in the Long-Duration 14 October 2014 Solar Eruption

, 2015
On 14 October 2014 the Sun Watcher with Active Pixels and Image Processing (SWAP) EUV solar telescope on-board the Project for On-Board Autonomy 2 (PROBA2) spacecraft observed an eruption that led to the formation of perhaps the largest post-eruptive ...
Seaton, Daniel B., West, Matthew J.
core   +1 more source

On the Existence of Long-period Decayless Oscillations in Short Active Region Loops

The Astrophysical Journal
Decayless kink oscillations, characterized by their lack of decay in amplitude, have been detected in coronal loops of varying scales in active regions, the quiet Sun, and coronal holes. Short-period (
Arpit Kumar Shrivastav, Vaibhav Pant, Rohan Kumar, David Berghmans, Tom Van Doorsselaere, Dipankar Banerjee, Elena Petrova, Daye Lim   +7 more
doaj   +1 more source

Coronal Behavior Before the Large Flare Onset

, 2014
Flares are a major explosive event in our solar system. They are often followed by coronal mass ejection that has a potential to trigger the geomagnetic storms.
Bamba, Yumi, Imada, Shinsuke, Kusano, Kanya   +2 more
core   +1 more source

Spectroscopic Study of Heating Distributions and Mechanisms Using Hinode/EIS

The Astrophysical Journal
Heating distributions along coronal loops are obtained from spectroscopic data with the Hinode/EUV Imaging Spectrometer. The loop half-lengths L _half are in the range of 24–107 Mm for our analysis of 18 loops.
Shun Ishigami, Hirohisa Hara, Takayoshi Oba   +2 more
doaj   +1 more source

Magnetic Jam in the Corona of the Sun

, 2015
The outer solar atmosphere, the corona, contains plasma at temperatures of more than a million K, more than 100 times hotter that solar surface. How this gas is heated is a fundamental question tightly interwoven with the structure of the magnetic field ...
Bingert, S., Chen, F., Cheung, M. C. M., Peter, H.   +3 more
core   +1 more source

Understanding the Magnetic Field and Plasma-β along Umbral Fan Loops Traced Using 3 Minute Slow Waves

The Astrophysical Journal Letters
Plasma- β is an important fundamental physical quantity in solar plasma physics, which determines the dominating process in the solar atmosphere, i.e., magnetic or thermodynamic processes. Here, for the first time, we provide variations of magnetic field
Ananya Rawat, Girjesh Gupta, Tom Van Doorsselaere, S. Krishna Prasad, Robertus Erdélyi   +4 more
doaj   +1 more source

On the Connection of Coronal Loop Plasma with the Ambient Magnetic Field

The Astrophysical Journal Letters
Solar coronal loops are magnetically confined plasma structures whose properties are closely linked to the ambient magnetic field. Using 3D magnetohydrodynamic simulations of kink-unstable coronal flux tubes, we investigate how the intensity of the ...
F. Reale, G. Cozzo, P. Pagano, P. Testa
doaj   +1 more source