Results 81 to 90 of about 1,700,755 (212)

LOCALISATION OF CHROMOSPHERIC EVAPORATION IN SOLAR FLARES, BY THE ANALYSIS OF X-RAY SPECTRA

Le Journal de Physique Colloques, 1988
AbstractAnalysis of solar flares using the data from the Bent Crystal Spectrometer on the SMM solar flare satellite, shows a thermal plasma which expands vertically at a velocity of up to 350 km s−1. This plasma, at a temperature of the order 25 106K is observed in the line radiation of He-like Ca XIX.
Gabriel, Aurélie, Millier, F., Lizambert, N.   +2 more
openaire   +2 more sources

Pengaruh Solar Flare Pada Perubahan Temperatur Atmosfer Bumi

, 1998
The temperature of the atmosphere and H-a flare data were used for studying solar activ-ity impact on the Earth's atmosphere. It showed that as a consequence of flare event the tem-perature of the stratosphere tended to decrease, on the other hand the ...
Nurzaman Adikusumah, Suratno
core  

Hinode EIS Observations of Plasma Composition Evolution and Radiative Cooling of Solar Flare Loops

The Astrophysical Journal
Plasma composition in flaring regions has been shown to have significant spatial and temporal variations, likely driven by dynamical processes that take place as a consequence of the sudden energy release at the reconnection site.
Teodora Mihailescu, Peter R. Young, David H. Brooks, Deborah Baker, Lucie M. Green, David M. Long, Lidia van Driel-Gesztelyi   +6 more
doaj   +1 more source

Young M-dwarfs flare activity model: Towards better exoplanetary atmospheric characterisation

Astronomy & Astrophysics
Context. Stellar flares can significantly influence the atmospheres and habitability of orbiting exoplanets, especially around young and active M dwarfs.
Mamonova E., Kowalski A. F., Herbst K., Wedemeyer S., Werner S. C.   +4 more
doaj   +1 more source

Detecting Solar Neutrino Flare and Flavors

, 2003
Intense solar flares originated in sun spots produce high energy particles (protons, $\alpha$) well observable by satellites and ground-based detectors. The flare onset produces signals in different energy bands (radio, X, gamma and neutrons).
FARGION, Daniele
core   +1 more source

Flare productivity of newly-emerged paired and isolated solar active regions [PDF]

, 2007
<p><b>Aims:</b> We investigate whether sunspot regions that emerge near existing ones are more flare productive than those that emerge isolated.</p> <p><b>Methods:</b> We analyse a sample of 2115 new regions ...
Fletcher, L, Walton, N.A., Dalla, S., Fletcher, L., L. Fletcher, N. A. Walton, S. Dalla, Walton, NA, Dalla, S   +8 more
core   +1 more source

Abundance Diagnostics from a Slitless Imaging Spectrometer: A Proof-of-concept for MaGIXS-2

The Astrophysical Journal
Elemental abundance diagnostics in the solar corona are crucial for understanding energy transport, plasma heating, and magnetic activity. Most earlier imaging-spectroscopic studies have relied on slit-based spectrometers, which offer high spectral ...
Biswajit Mondal, Amy R. Winebarger, P. S. Athiray   +2 more
doaj   +1 more source

Anisotropic Bremsstrahlung Emission and the Form of Regularized Electron Flux Spectra in Solar Flares

The Astrophysical Journal, 2004
The cross section for bremsstrahlung photon emission in solar flares is, in general, a function of the angle theta between the incoming electron and the outgoing photon directions. Thus the electron spectrum required to produce a given photon spectrum is a function of this angle, which is related to the position of the flare on the solar disk and the ...
A. M. Massone, A. G. Emslie, E. P. Kontar, PIANA, MICHELE, M. Prato, J. C. Brown   +5 more
openaire   +4 more sources

Solar flare particle radiation [PDF]

, 1972
The characteristics of the solar particles accelerated by solar flares and subsequently observed near the orbit of the earth are studied. Considered are solar particle intensity-time profiles, the composition and spectra of solar flare events, and the ...
Lanzerotti, L. J.
core  

NE V line ratios in the EUV spectra of solar flares

The Astrophysical Journal, 1992
Theoretical line ratios involving 2s(2)2p(2)-2s2p3 transitions in Ne v between 359 and 572 angstrom are presented. A comparison of these with solar flare observational data from the Naval Research Laboratory's S082A spectrograph on board Skylab reveals excellent agreement between theory and experiment, with discrepancies that average only 8%.
F. P. Keenan, E. S. Conlon, L. K. Harra, K. M. Aggarwal, K. G. Widing   +4 more
openaire   +1 more source