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Probability Distribution Functions of Solar and Stellar Flares [PDF]
Physics, 2022 The paper studies the soft X-ray data of solar flares and found that the distribution functions of flare fluence are successfully modeled by tapered power law or gamma function distributions whose power exponent is slightly smaller than 2, indicating ...
Takashi Sakurai
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Living Reviews in Solar PhysicsMagnetic 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
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Empirical Models of Stellar Flares: Constraints on Flare Theories [PDF]
International Astronomical Union Colloquium, 1983 ABSTRACTA review is presented on empirical flare models of UV Cet type stars based upon optical,UV, X-ray, and radio observations. The observational constraints on the flare energetics, nature of radiation sources, and flare structures are discussed, with special attention to the geometrical dimension and the magnetic field of the flaring region.
Keiichi Kodaira
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Rosat Observations of Stellar Flares [PDF]
International Astronomical Union Colloquium, 1994 AbstractX-ray observations of stellar flares obtained during the ROSAT all-sky survey as well as in the ROSAT pointing program are discussed. The ROSAT all-sky survey allowed—for the first time—an unbiased search for stellar flares among all types of stars.
J. H. M. M. Schmitt
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Polarimetry of Stellar Active Regions and Flares [PDF]
Solar Physics, 1989 AbstractObservations of regular and irregular polarimetric variability in late-type stars are reviewed, and the related physical and geometrical effects are discussed. There are indications that the irregular part of the variability could be caused by transient events, possibly associated with flares.
I. Tuominen +4 more
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Solar and Stellar Flares: Questions and Problems [PDF]
International Astronomical Union Colloquium, 1989 AbstractAlthough progress has been made in understanding certain aspects of the physics of solar and stellar flares, there are a number of topics which, in the author's opinion, still pose a problem. We summarize these topics here.
D. J. Mullan
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Analyzing the Morphology of Late-phase Stellar Flares from G-, K-, and M-type Stars
The Astrophysical JournalStellar flares occasionally present a peak-bump light-curve morphology, consisting of an initial impulsive phase followed by a gradual late phase.
Denise G. Yudovich +2 more
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The Astrophysical JournalThe most powerful stellar flares driven by magnetic energy occur during the early pre-main-sequence (PMS) phase. The Orion Nebula represents the nearest region populated by young stars, showing the greatest number of flares accessible to a single ...
Konstantin V. Getman +10 more
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Effect of Time-varying X-Ray Emission from Stellar Flares on the Ionization of Protoplanetary Disks
The Astrophysical JournalX-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an energy ...
Haruka Washinoue +2 more
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Self-organized Criticality in Stellar Flares [PDF]
The 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
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