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Stellar flares

open access: yesLiving Reviews in Solar Physics
Magnetic storms on stars manifest as remarkable, randomly occurring changes of the luminosity over durations that are tiny in comparison to the normal evolution of stars.
Adam F. Kowalski
doaj   +3 more sources

White-Light Continuum in Stellar Flares [PDF]

open access: yesProceedings of the International Astronomical Union, 2015
In this talk, we discuss the formation of the near-ultraviolet and optical continuum emission in M dwarf flares through the formation of a dense, heated chromospheric condensation.
Kowalski, Adam F.
core   +2 more sources

Scaling laws of solar and stellar flares [PDF]

open access: yesThe Astrophysical Journal, 2007
In this study we compile for the first time comprehensive data sets of solar and stellar flare parameters, including flare peak temperatures T_p, flare peak volume emission measures EM_p, and flare durations t_f from both solar and stellar data, as well ...
Doyle J. G.   +9 more
core   +2 more sources

Self-organized Criticality in Stellar Flares [PDF]

open access: yesThe Astrophysical Journal, 2021
Abstract Power-law size distributions are the hallmarks of nonlinear energy dissipation processes governed by self-organized criticality (SOC). Here we analyze 75 data sets of stellar flare size distributions, mostly obtained from the Extreme-Ultraviolet Explorer and the Kepler mission.
Markus J. Aschwanden, Manuel Güdel
openaire   +3 more sources

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

open access: yesThe 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

White-light Superflare and Long-term Activity of the Nearby M7-type Binary EI Cnc Observed with GWAC System

open access: yesThe Astrophysical Journal, 2023
Stellar white-light flares are believed to play an essential role in the physical and chemical properties of the atmosphere of the surrounding exoplanets.
Hua-Li Li   +16 more
doaj   +1 more source

Radio Stars of the SKA

open access: yesUniverse, 2021
Radio emission from stars can be used, for example, to study ionized winds or stellar flares. The radio emission is faint and studies have been limited to few objects.
Bin Yu, Albert Zijlstra, Biwei Jiang
doaj   +1 more source

Bridging High-density Electron Beam Coronal Transport and Deep Chromospheric Heating in Stellar Flares

open access: yesThe Astrophysical Journal Letters, 2023
The optical and near-ultraviolet (NUV) continuum radiation in M-dwarf flares is thought to be the impulsive response of the lower stellar atmosphere to magnetic energy release and electron acceleration at coronal altitudes.
Adam F. Kowalski
doaj   +1 more source

Stellar flares with PLATO

open access: yes, 2023
Stellar flares are powerful localized eruptions caused by magnetic reconnection events in a star's magnetosphere that can be seen across the entire electromagnetic spectrum. Over short timescales of minutes to a few hours, they emit energies up to 10^38 erg.
Raetz, Stefanie   +6 more
openaire   +1 more source

Analysis and modeling of high temporal resolution spectroscopic observations of flares on AD Leo [PDF]

open access: yes, 2006
We report the results of a high temporal resolution spectroscopic monitoring of the flare star AD Leo. During 4 nights, more than 600 spectra were taken in the optical range using the Isaac Newton Telescope (INT) and the Intermediate Dispersion ...
Abada-Simon   +93 more
core   +3 more sources

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