Results 21 to 30 of about 152,015 (264)

Detection of Solar Neutrons and Solar Neutron Decay Protons

Universe, 2023
Solar flares are broadly classified as impulsive or gradual. Ions accelerated in a gradual flare are thought to be accelerated through a shock acceleration mechanism, but the particle acceleration process in an impulsive flare is still largely unexplored.
Yasushi Muraki, Tatsumi Koi, Satoshi Masuda, Yutaka Matsubara, Pedro Miranda, Shoko Miyake, Tsuguya Naito, Ernesto Ortiz, Akitoshi Oshima, Takashi Sako, Shoichi Shibata, Hisanori Takamaru, Munetoshi Tokumaru, Jóse F. Valdés-Galicia, Kyoko Watanabe   +14 more
doaj   +1 more source

Solar Flares [PDF]

International Astronomical Union Colloquium, 1995
AbstractThere are many types of solar flare, but the classic type is a two-ribbon flare with three phases — a preflare phase, a rise phase and a main phase. The properties of these phases are described, together with some recent observational advances in understanding the conditions for solar flares.
openaire   +1 more source

Electric Currents through J-shaped and Non-J-shaped Flare Ribbons [PDF]

Astrophysical Journal, 2020, Volume 900, Issue 1, id.38, 2020
Recently solar flares exhibiting a double J-shaped ribbons in the lower solar atmosphere have been paid increasing attention in the context of extending the two-dimensional standard flare model to three dimensions, as motivated by the spatial correlation between photospheric current channels and flare ribbons.
arxiv   +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

Diagnostics of solar flare reconnection [PDF]

Nonlinear Processes in Geophysics, 2004
Abstract. We present new diagnostics of the solar flare reconnection, mainly based on the plasma radio emission. We propose that the high-frequency (600-2000 MHz) slowly drifting pulsating structures map the flare magnetic field reconnection. These structures correspond to the radio emission from plasmoids which are formed in the extended current sheet
Karlický, M., Bárta, M.
openaire   +5 more sources

Full-Disk Solar Flare Forecasting Model Based on Data Mining Method

Advances in Astronomy, 2019
Solar flare is one of the violent solar eruptive phenomena; many solar flare forecasting models are built based on the properties of active regions. However, most of these models only focus on active regions within 30° of solar disk center because of the
Rong Li, Yong Du
doaj   +1 more source

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

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

A solar tornado triggered by flares? [PDF]

Astronomy & Astrophysics, 2013
7 pages, 8 Figures, accepted for publication in A&A, Movies can be found at http://www.mps.mpg.de/data/outgoing/panesar/tornado/
Panesar, N. K., Innes, Davina E., Tiwari, S. K., Low, B. C.   +3 more
openaire   +4 more sources

Properties and Energetics of Magnetic Reconnection: I. Evolution of Flare Ribbons [PDF]

, 2022
In this article, we measure the mean magnetic shear from the morphological evolution of flare ribbons, and examine the evolution of flare thermal and non-thermal X-ray emissions during the progress of flare reconnection. We analyze three eruptive flares and three confined flares ranging from GOES class C8.0 to M7.0.
arxiv   +1 more source