Response of Global Ionospheric Currents to Solar Flares with Extreme Ultraviolet Late Phases
The Astrophysical JournalIt is known that solar flares can affect the current system of the middle- and low-latitude ionosphere. Most earlier studies have focused on such effects during their impulsive phases.
Xuanqing Liu +7 more
doaj +1 more source
Direct measurements of impulsive extreme ultraviolet and hard X-ray solar flare emission
The Astrophysical Journal, 1982 Direct, simultaneous measurements of the 100--1030 A EUV and 15--150 keV X-ray emission during solar flares having impulse phases are reported. Time histories of the energy fluxes and flux ratios for three flares were obtained from Solrad 11 satellite data.
D. M. Horan, R. W. Kreplin, G. G. Fritz
openaire +1 more source
Propagating and Stationary Bright Knots in the Quiet Solar Corona
The Astrophysical JournalSmall-sized localized brightenings are an important candidate for resolving the problem of the solar atmospheric heating. They are spread over the whole solar disk and are suggested to be caused by magnetic reconnection or wave dissipation.
Shaoxuan Tong, Jun Zhang
doaj +1 more source
Hydrostatic Modeling of the Integrated Soft X‐Ray and Extreme Ultraviolet Emission in Solar Active Regions [PDF]
The Astrophysical Journal, 2006 Many studies of the solar corona have shown that the observed X-ray luminosity is well correlated with the total unsigned magnetic flux. In this paper we present results from the extensive numerical modeling of active regions observed with the Solar and Heliospheric Observatory (SOHO) EUV Imaging Telescope (EIT), the Yohkoh Soft X-Ray Telescope (SXT ...
Harry P. Warren, Amy R. Winebarger
openaire +1 more source
A UV-XUV attosecond beamline with few-femtosecond tunable ultraviolet pump pulses [PDF]
EPJ Web of ConferencesUltrafast charge transfer processes in organic materials which occur in organic materials are fundamental for advancing solar energy conversion technologies.
Colaizzi Lorenzo +10 more
doaj +1 more source
The Astrophysical JournalHigh-resolution EUV spectroscopy provides an informative diagnostic tool for the early evolution of coronal mass ejections (CMEs) since it can directly measure many physical properties of CME plasma close to the Sun that cannot be determined from white ...
E. M. Wraback +3 more
doaj +1 more source
A Possible Mechanism for the “Late Phase” in Stellar White-light Flares
The Astrophysical Journal, 2023 M dwarf flares observed by the Transiting Exoplanet Survey Satellite (TESS) sometimes exhibit a peak-bump light-curve morphology, characterized by a secondary, gradual peak well after the main, impulsive peak.
Kai E. Yang +3 more
doaj +1 more source
Extreme-ultraviolet Polarimetric Diagnostics of the Solar Corona: The Hanle Effect of Ne viii 770 Å
The Astrophysical JournalMagnetic fields are the primary driver of the plasma thermodynamics in the upper solar atmosphere, especially in the corona. However, magnetic field measurements in the solar corona are sporadic, thereby limiting us from the complete understanding of ...
Raveena Khan +3 more
doaj +1 more source
Pixel-to-pixel Translation of Solar Extreme-ultraviolet Images for DEMs by Fully Connected Networks
The Astrophysical Journal Supplement Series, 2023 In this study, we suggest a pixel-to-pixel image translation method among similar types of filtergrams such as solar extreme-ultraviolet (EUV) images. For this, we consider a deep-learning model based on a fully connected network in which all pixels of ...
Eunsu Park +8 more
doaj +1 more source
Emission of Extreme Ultraviolet Line Radiation from Solar Centers of Activity.
The Astronomical Journal, 1963 Correlation of extreme ultraviolet radiation spectral line emission intensity with active regions on solar disk based on corona electron temperature and ...
openaire +1 more source