Results 81 to 90 of about 18,154 (212)

RHESSI images and spectra of two small flares

, 2005
We studied the evolution of two small flares (GOES class C2 and C1) that developed in the same active region with different morphological characteristics: one is extended and the other is compact. We analyzed the accuracy and the consistency of different
A. Falchi, A. O. Benz, C. D. Pike, C. Liu, D. M. Smith, G. J. Hurford, H. Carmichael, J. Qiu, K. J. H. Phillips, L. Fletcher, L. Maltagliati, L. Teriaca, M. J. Aschwanden, M. J. Aschwanden, P. A. Sturrock, P. C. Grigis, P. H. Scherrer, R. A. Harrison, R. A. Kopp, R. A. Schwartz, R. P. Lin, R. P. Lin, R. P. Lin, S. Krucker, T. Hirayama, T. R. Metcalf   +25 more
core   +2 more sources

Al‐Khadhaf: The first camera‐observed (H5–6) meteorite fall from Oman

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 522-547, March 2026.
Abstract A fireball camera system installed in 2022 by the Oman Meteorite Monitoring Project (OMMP) as part of the Global Fireball Observatory (GFO) recorded a 3.2 s fireball on March 8, 2022 at 8:15 p.m. UTC. A meteoroid of 4 ± 2 kg entered the atmosphere at 14.0 km/s.
Anna Zappatini, Edwin Gnos, Beda A. Hofmann, Urs Eggenberger, Pascal M. Kruttasch, Frank Gfeller, Mohammad Tauseef, Ingo Leya, Hadrien A. R. Devillepoix, Eleanor K. Sansom, Martin Cupák, Sophie E. Deam, Thomas W. C. Stevenson, Peter Jenniskens, Sebastian Lindemann, Beat Booz, Muati. S. Al‐Muati, Abdulmunaim A. Al‐Zakwani, Hussain A. Al‐Ghafri   +18 more
wiley   +1 more source

Fe xviii and Fe xx Forbidden Lines Observed by Solar Orbiter/SPICE

The Astrophysical Journal
The first simultaneous observations of the Fe xviii 974.86 Å and Fe xx 721.56 Å forbidden lines from the Spectral Imaging of the Coronal Environment (SPICE) spectrograph on Solar Orbiter are presented.
Peter R. Young, Andrew R. Inglis, Graham S. Kerr, Therese A. Kucera, Daniel F. Ryan   +4 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

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   +1 more source

Magnetic Energy Spectra in Active Regions

, 2010
Line-of-sight magnetograms for 217 active regions (ARs) of different flare rate observed at the solar disk center from January 1997 until December 2006 are utilized to study the turbulence regime and its relationship to the flare productivity. Data from {
Abramenko, Abramenko, Abramenko, Barnes, Falconer, Falconer, Fisher, Georgoulis, Kammler, Klimchuk, Leka, Leka, Lionello, McAteer, Monin, Parnell, Sammis, Schaffenberger, Schrijver, Schrijver, Schrijver, Spirock, Valentyna Abramenko, Vasyl Yurchyshyn, Wheatland   +24 more
core   +1 more source

Solar Soft X‐Ray Proxy Derived From Observed Auger Photoelectrons by MGS and a 1999–2006 Flare Catalog at Mars

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract This study uses a novel approach to infer the solar soft X‐ray (SXR) irradiance from Auger photoelectron fluxes. Solar SXR irradiance is highly variable, particularly during solar flares. Solar SXR photons at ∼< ${\sim} < $2.5 nm produce oxygen Auger photoelectrons by photoionizing atmospheric constituents. More specifically, we derive the fit
Shaosui Xu, Edward M. Thiemann, David L. Mitchell, Phillip C. Chamberlin   +3 more
wiley   +1 more source

Further observations of protons resulting from the decay of neutrons ejected by solar flares [PDF]

The solar flare of 1984 April 24 produced a large gamma ray fluence with energy 2MeV. The time profile of the interplanetary flux from this flare indicates the presence of decaying solar neutrons.
Evenson, P. A., Kroeger, R., Meyer, P.
core   +1 more source

High-resolution X-ray spectra of solar flares. VI - Impulsive soft X-ray flares

The Astrophysical Journal, 1982
Doschek et al. (1980) and Feldman et al. (1980) have discussed high-resolution soft X-ray spectra of solar flares. The present investigation is concerned with the characteristics of the impulsive events as observed in soft X rays and the cooling of the flare plasma in terms of energy loss processes.
U. Feldman, G. A. Doschek, R. W. Kreplin
openaire   +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