Results 41 to 50 of about 1,141,583 (297)

Interrogating solar flare loop models with IRIS observations 1: Overview of the models, and mass flows

Frontiers in Astronomy and Space Sciences, 2022
Solar flares are transient yet dramatic events in the atmosphere of the Sun, during which a vast amount of magnetic energy is liberated. This energy is subsequently transported through the solar atmosphere or into the heliosphere, and together with ...
Graham S. Kerr, Graham S. Kerr
doaj   +1 more source

Estimating the frequency of extremely energetic solar events, based on solar, stellar, lunar, and terrestrial records [PDF]

, 2012
The most powerful explosions on the Sun [...] drive the most severe space-weather storms. Proxy records of flare energies based on SEPs in principle may offer the longest time base to study infrequent large events.
Aschwanden, Aschwanden, Audard, Audard, Basri, Benz, Benz, Berdyugina, C. J. Schrijver, Caballero-Lopez, Castagnoli, Cliver, Cliver, D. R. Soderblom, Dreschhoff, E. W. Cliver, E. W. Wolff, Emslie, Emslie, Endl, Ercolano, Field, Fletcher, Fuhrer, Gopalswamy, Gopalswamy, Güdel, Güdel, Güdel, Güdel, H. S. Hudson, Hall, Hapgood, Hawley, Hawley, Heikkilä, I. G. Usoskin, J. Beer, Jackman, Jackman, Jackman, Jokipii, Judge, K. G. McCracken, Kahler, Kane, Kovaltsov, Kretzschmar, Krucker, Kürster, Lal, Lange, Legrand, Lin, Lingenfelter, Lingenfelter, M. Güdel, Masarik, Masarik, Masarik, McCracken, McCracken, Metcalf, Neupert, Nishiizumi, Osten, Osten, Osten, Parnell, Potgieter, R. A. Osten, Raisbeck, Reames, Reames, Reames, Reedy, Rishbeth, Rouillard, Schaefer, Schrijver, Schrijver, Schrijver, Schrijver, Schrijver, Schrijver, Shea, Shea, Shimizu, Shimizu, Solanki, Space Studies Board, Steinhilber, Steinhilber, Stelzer, Stelzer, T. Peter, Taylor, Tranquille, Tsurutani, Tylka, Tylka, U. Baltensperger, Usoskin, Usoskin, Usoskin, Usoskin, Vainio, Van Hollebeke, Veronig, Veronig, Vonmoos, Walkowicz, Webber, Whitlow, Wiedenbeck, Wolff, Wolff, Woods, Woods, Zhang   +119 more
core   +3 more sources

Chromospheric Bubbles in Solar Flares [PDF]

The Astrophysical Journal Letters, 2020
Abstract We analyze a grid of radiative hydrodynamic simulations of solar flares to study the energy balance and response of the atmosphere to nonthermal electron beam heating. The appearance of chromospheric bubbles is one of the most notable features that we find in the simulations.
A. Reid, B. Zhigulin, M. Carlsson, M. Mathioudakis   +3 more
openaire   +6 more sources

Solar flare effects on D-region ionosphere using VLF measurements during low- and high-solar activity phases of solar cycle 24

Earth, Planets and Space, 2018
The effects of solar flares on the propagation of subionospheric VLF signals from NWC and NLK transmitter stations monitored at a low-latitude station, Suva (18.2°S, 178.4°E), Fiji, between December 2006 and December 2010 (an unprecedented solar minimum ...
Abhikesh Kumar, Sushil Kumar
doaj   +1 more source

Power-law Distribution of Solar Cycle–modulated Coronal Jets

The Astrophysical Journal Supplement Series, 2023
Power-law distributions have been studied as a significant characteristic of nonlinear dissipative systems. Since discovering the power-law distribution of solar flares that was later extended to nanoflares and stellar flares, it has been widely accepted
Jiajia Liu, Anchuan Song, David B. Jess, Jie Zhang, Mihalis Mathioudakis, Szabolcs Soós, Francis P. Keenan, Yuming Wang, Robertus Erdélyi   +8 more
doaj   +1 more source

Global Energetics of Solar Flares. V. Energy Closure in Flares and Coronal Mass Ejections [PDF]

, 2017
In this study we synthesize the results of four previous studies on the global energetics of solar flares and associated coronal mass ejections (CMEs), which include magnetic, thermal, nonthermal, and CME energies in 399 solar M- and X-class flare events
M. Aschwanden, A. Caspi, C. Cohen, Gordon D. Holman, J. Jing, M. Kretzschmar, E. P. Kontar, J. McTiernan, R. Mewaldt, A. O’Flannagain, I. Richardson, D. Ryan, H. Warren, Yan Xu   +13 more
semanticscholar   +1 more source

Mini-filament Eruptions Triggering Confined Solar Flares Observed by ONSET and SDO [PDF]

Astrophysical Journal, 2018
Using the observations from the Optical and Near-infrared Solar Eruption Tracer (ONSET) and the Solar Dynamics Observatory (SDO), we study an M5.7 flare in AR 11476 on 2012 May 10 and a micro-flare in the quiet Sun on 2017 March 23.
Shuhong Yang, Jun Zhang
semanticscholar   +1 more source

A model of solar flares [PDF]

Symposium - International Astronomical Union, 1968
A model of solar flares is proposed in which the preflare state comprises a bipolar magnetic-field structure associated with a bipolar photospheric magnetic region. At low heights, the magnetic-field lines are closed but, at sufficiently great heights, the lines are drawn out into an open structure comprising a bipolar flux tube containing a ‘neutral ...
openaire   +2 more sources

Solar–Stellar Connection: X-Ray Flares to Energetic (E > 10 MeV) Particle Events

The Astrophysical Journal, 2023
Energetic particle environments are an important factor for the viability of life on exoplanets surrounding flare stars. In the heliosphere, large gradual solar energetic ( E > 10 MeV) particle (SEP) events are produced by shocks from fast coronal mass ...
S. W. Kahler, A. G. Ling
doaj   +1 more source

Latitudinal distribution of solar microflares and high-temperature plasma at solar minimum

Solar-Terrestrial Physics, 2023
The paper analyzes the latitudinal distribution of high-temperature plasma (T>4 MK) and microflares on the solar disk during low solar activity in 2009.
Kirichenko A. S., Loboda I. P., Reva A. A., Ulyanov A. S., Bogachev S. A.   +4 more
doaj   +1 more source