Results 81 to 90 of about 1,165,809 (269)

The Efficiency of Electron Acceleration during the Impulsive Phase of a Solar Flare

The Astrophysical Journal Letters, 2023
Solar flares are known to be prolific electron accelerators, yet identifying the mechanism(s) for such efficient electron acceleration in solar flare (and similar astrophysical settings) presents a major challenge.
Eduard P. Kontar, A. Gordon Emslie, Galina G. Motorina, Brian R. Dennis   +3 more
doaj   +1 more source

Critical Height of the Torus Instability in Two-ribbon Solar Flares [PDF]

, 2017
We studied the background field for 60 two-ribbon flares of M-and-above classes during 2011–2015. These flares are categorized into two groups, i.e., eruptive and confined flares, based on whether a flare is associated with a coronal mass ejection or not.
Dong Wang, Rui Liu, Yuming Wang, Kai Liu, Jun Chen, Jiajia Liu, Zhenjun Zhou, Min Zhang   +7 more
semanticscholar   +1 more source

New cases of δ‐aminolevulinic acid dehydratase deficiency: Functional insights into gene variants using an innovative mouse liver model

Journal of Internal Medicine, EarlyView.
Abstract Background Dysfunction of δ‐aminolevulinic acid dehydratase (ALAD), the second enzyme involved in heme biosynthesis, leads to two pathologies: genetic and acquired. The genetic form is an ultrarare, severe childhood‐onset disease inherited in an autosomal recessive manner, whereas the acquired form usually affects adults due to enzyme ...
Elena Di Pierro, Isabel Solares, Daniel Jericó, Francisco J. Castelbón, Javier Tomás Solera, Antoni Riera‐Mestre, María Barreda‐Sánchez, Carlo Poci, Annamaria Nicolli, Francesco Urigo, Ana Sampedro, Rafael Enríquez de Salamanca, Matteo Marcacci, Matías A. Ávila, Pauline Harper, Marta G. Fanlo‐Maresma, Encarna Guillén‐Navarro, Giovanna Graziadei, Andrea Wenzel, Bodo B. Beck, Paolo Ventura, Montserrat Morales‐Conejo, Antonio Fontanellas   +22 more
wiley   +1 more source

Modelling Quasi-Periodic Pulsations in Solar and Stellar Flares [PDF]

, 2018
Solar flare emission is detected in all EM bands and variations in flux density of solar energetic particles. Often the EM radiation generated in solar and stellar flares shows a pronounced oscillatory pattern, with characteristic periods ranging from a ...
J. McLaughlin, V. Nakariakov, V. Nakariakov, V. Nakariakov, M. Dominique, P. Jelínek, S. Takasao   +6 more
semanticscholar   +1 more source

On the Optimal Prediction of Extreme Events in Heavy‐Tailed Time Series With Applications to Solar Flare Forecasting

Journal of Time Series Analysis, EarlyView.
ABSTRACT The prediction of extreme events in time series is a fundamental problem arising in many financial, scientific, engineering, and other applications. We begin by establishing a general Neyman–Pearson‐type characterization of optimal extreme event predictors in terms of density ratios.
Victor Verma, Stilian Stoev, Yang Chen
wiley   +1 more source

The correlation between soft and hard X-rays component in flares: from the Sun to the stars

, 2007
In this work we study the correlation between the soft (1.6--12.4 keV, mostly thermal) and the hard (20--40 and 60--80 keV, mostly non-thermal) X-ray emission in solar flares up to the most energetic events, spanning about 4 orders of magnitude in peak ...
Favata, F., Hudson, H. S., Isola, C., Micela, G.   +3 more
core   +1 more source

Eruption of a multi-flux-rope system in solar active region 12673 leading to the two largest flares in Solar Cycle 24 [PDF]

Astronomy & Astrophysics, 2018
Context. Solar active region (AR) 12673 in 2017 September produced the two largest flares in Solar Cycle 24: the X9.3 flare on September 6 and the X8.2 flare on September 10. Aims.
Y. Hou, J. Zhang, T. Li, S. Yang, X. H. Li   +4 more
semanticscholar   +1 more source

Embracing the politics of transformation: Policy action as “battle‐settlement events”

Review of Policy Research, EarlyView.
Abstract Societal transformations for addressing climate change are intensely contested and at risk of resistance and backlash to ambitious policy action. But they are frequently modeled through heuristics such as S‐curves which abstract from such conflicts, assuming increasing returns to scale as a driver of transformations.
James Patterson, Matthew Paterson
wiley   +1 more source

Solar Magnetic Activity and Its Terrestrial Impact through Correlations with Drought Indices

Physical Sciences and Technology
Solar activity manifests itself in the form of sunspots on the solar surface and solar flares, which can influence Earth's climatic conditions, including drought in mid-latitude regions.
Aiganym Sarsembayeva, Laura Ryssaliyeva, Farida Belissarova, Akmaral Sarsembay   +3 more
doaj   +1 more source

Commission 10: Solar Activity [PDF]

, 2007
Commission 10 aims at the study of various forms of solar activity, including networks, plages, pores, spots, fibrils, surges, jets, filaments/prominences, coronal loops, flares, coronal mass ejections (CMEs), solar cycle, microflares, nanoflares ...
Benz, A.O., Craig, Ian J.D., Gopalswamy, N., Harrison, R.A., Klimchuk, James A., Kozlovsky, B.Z., Melrose, Donald B., Poletto, G., Schrijver, K.J., Van Driel-Gesztelyi, L., Wang, J.-X.   +10 more
core   +2 more sources