Results 101 to 110 of about 18,154 (212)
The Astrophysical JournalVariations in X-ray and extreme ultraviolet (EUV) irradiance during solar flares lead to a noticeable increase in the electron concentration in the illuminated part of the Earth’s ionosphere.
Susanna Bekker +2 more
doaj +1 more source
Source energy spectra from demodulation of solar particle data by interplanetary and coronal transport [PDF]
The data on source energy spectra of solar cosmic rays (SCR), i.e. the data on the spectrum form and on the absolute SCR are of interest for three reasons: (1) the SCR contain the energy comparable to the total energy of electromagnetic flare radiation ...
Alvarez-Madrigal, M. +3 more
core +1 more source
Plasma heating in the very early and decay phases of solar flares
, 2011 In this paper we analyze the energy budgets of two single-loop solar flares under the assumption that non-thermal electrons are the only source of plasma heating during all phases of both events.
Aschwanden +18 more
core +1 more source
Energetic proton spectra in the 11 June 1991 solar flare
AIP Conference Proceedings, 2000 The June 11, 1991 gamma-ray flare seen by the Compton Gamma-ray Observatory (CGRO) displays several features that make it a dynamic and rich event. It is a member of a class of long duration gamma-ray events with both 2.223 MeV and greater than 8 MeV emission for hours after the impulsive phase. It also contains an inter-phase between the impulsive and
Young, C A +9 more
openaire +4 more sources
Double Power-law Formation by Sequential Particle Acceleration
The Astrophysical JournalSpectral double power laws are common in solar high-energy phenomena such as flares and interplanetary energetic-electron events. However, the physical mechanism that produces the changes in power-law index within a single spectrum is unclear.
S. E. Guidoni +3 more
doaj +1 more source
Intense Hard X-Ray Emissions in C-class Flares: A Statistical Study with ASO-S/HXI Data
The Astrophysical Journal LettersIn the standard model of solar eruptive events, coronal mass ejections (CMEs) and flares are associated with each other through magnetic reconnection initiated by erupting flux ropes.
Changxue Chen +5 more
doaj +1 more source
The Astrophysical JournalHow the plasma in the atmosphere is heated during a solar flare remains inconclusive. Nonthermal electron beams are usually considered as an essential heating source, yet Alfvén waves have also been proposed as a promising heating mechanism.
Jun Tian, Ying Li, Jie Hong, M. D. Ding
doaj +1 more source
Sun-as-a-star Study of an X-class Solar Flare with Spectroscopic Observations of CHASE
The Astrophysical JournalSun-as-a-star spectroscopic characteristics of solar flares can be used as a benchmark for the detection and analysis of stellar flares. Here, we study the Sun-as-a-star properties of an X1.0 solar flare, using high-resolution spectroscopic data obtained
Y. L. Ma +7 more
doaj +1 more source
Energy Conversion and Electron Acceleration and Transport in 3D Simulations of Solar Flares
The Astrophysical JournalRecent observations and simulations indicate that solar flares undergo extremely complex 3D evolution, making 3D particle transport models essential for understanding electron acceleration and interpreting flare emissions.
Xiaocan Li +8 more
doaj +1 more source
The Astrophysical Journal LettersPostflare loops are loop-like plasmas observed during the decay phase of solar flares, and they are expected to exist for stellar flares. However, it is unclear how postflare loops are observed in stellar flares’ cases.
Takato Otsu +3 more
doaj +1 more source