Results 11 to 20 of about 19,921 (169)
X-ray emission from solar neighbourhood flare stars [PDF]
Symposium - International Astronomical Union, 1990 A brief summary is given of a comprehensive analysis of EXOSAT observations of solar neighbourhood flare stars. Special attention is devoted to the discussion of quiescent X-ray emission and time variability.
R. Pallavicini +2 more
openaire +1 more source
Cold Solar Flares. I. Microwave Domain
The Astrophysical Journal, 2023 We identify a set of ∼100 “cold” solar flares and perform a statistical analysis of them in the microwave range. Cold flares are characterized by a weak thermal response relative to nonthermal emission.
Alexandra L. Lysenko +6 more
doaj +1 more source
SphinX MEASUREMENTS OF THE 2009 SOLAR MINIMUM X-RAY EMISSION [PDF]
The Astrophysical Journal, 2012 Astrophysical Journal, in press.
Sylwester, J +11 more
openaire +3 more sources
Solar wind charge exchange X-ray emission from Mars [PDF]
Astronomy & Astrophysics, 2012 Aims. We study the soft X-ray emission induced by charge exchange (CX) collisions between solar-wind, highly charged ions and neutral atoms of the Martian exosphere. Methods. A 3D multi species hybrid simulation model with improved spatial resolution (130 km) is used to describe the interaction between the solar wind and the Martian neutrals.
Koutroumpa, Dimitra +5 more
openaire +3 more sources
The Astrophysical Journal, 2023 Three generations of the Miniature X-ray Solar Spectrometer (MinXSS) have flown on small satellites with the goal “to explore the energy distribution of soft X-ray (SXR) emissions from the quiescent Sun, active regions, and during solar flares, and to ...
Thomas N. Woods +13 more
doaj +1 more source
Jovian X‐ray emission from solar X‐ray scattering
Geophysical Research Letters, 2000 Soft x‐ray emissions with brightnesses of about 0.01–0.2 Rayleighs have been observed from both the equatorial and auroral regions of Jupiter. It has been proposed that the equatorial emission, like the auroral emission, may be largely due to precipitation of energetic heavy ions into the atmosphere [Waite et al., 1997].
Ahilleas N. Maurellis +4 more
openaire +1 more source
The Role of Magnetic Shear in Reconnection-driven Flare Energy Release
The Astrophysical Journal, 2023 Using observations from the Solar Dynamics Observatory’s Atmosphere Imaging Assembly and the Ramaty High Energy Solar Spectroscopic Imager, we present novel measurements of the shear of post-reconnection flare loops (PRFLs) in SOL20141218T21:40 and study
J. Qiu +8 more
doaj +1 more source
Top-side ionosphere response to extreme solar events [PDF]
Annales Geophysicae, 2006 Strong X-flares and solar energetic particle (SEP) fluxes are considered as sources of topside ionospheric disturbances observed by the ROCSAT-1/IPEI instrument during the Bastille Day event on 14 July 2000 and the Halloween event on 28 ...
A. V. Dmitriev +7 more
doaj +1 more source
Statistical Properties of Soft X-Ray Emission of Solar Flares [PDF]
The Astrophysical Journal, 2019 Abstract We present a statistical analysis of properties of Soft X-Ray (SXR) emission, plasma temperature (T), and emission measure (EM), derived from Geostationary Operational Environmental Satellite observations of flares in 2002–2017.
Viacheslav M Sadykov +3 more
openaire +2 more sources
Earth and Planetary PhysicsSolar Wind Charge eXchange X-ray (SWCX) emission in the heliosphere and Earth's exosphere is a hard to avoid signal in soft X-ray observations of astrophysical targets.
Dimitra Koutroumpa
doaj +1 more source