Results 61 to 70 of about 18,154 (212)

Turbulence in the Solar Atmosphere: Manifestations and Diagnostics via Solar Image Processing

, 2005
Intermittent magnetohydrodynamical turbulence is most likely at work in the magnetized solar atmosphere. As a result, an array of scaling and multi-scaling image-processing techniques can be used to measure the expected self-organization of solar ...
A. C. Cadavid, A. N. Zhukov, A. O. Benz, B. De Pontieu, B. J. Thompson, B. Mandelbrot, C. J. Schrijver, D. G. Wentzel, D. L. Mickey, D. M. Rust, D. M. Rust, D. Stauffer, E. N. Parker, E. Robbrecht, E. T. Lu, E. T. Lu, F. Cattaneo, G. Einaudi, G. Nicolis, G. Stenborg, H. G. E. Hentschel, H. S. Hudson, I. De Moortel, J. Chae, J. K. Lawrence, J. K. Lawrence, J. K. Lawrence, J. Polygiannakis, J. Qiu, K. Janßen, K. L. Harvey, K. Tziotziou, L. Vlahos, L. Vlahos, L. Vlahos, M. Georgoulis, M. J. Aschwanden, M. K. Georgoulis, M. K. Georgoulis, M. K. Georgoulis, M. K. Georgoulis, M. Turmon, Manolis K. Georgoulis, N. Meunier, N. Meunier, P. Bak, P. Bak, P. Charbonneau, P. Dmitruk, P. E. Seiden, R. H. Kraichnan, S. W. Kahler, S. W. McIntosh, T. G. Forbes, T. Roudier, T. Shimizu, U. Frisch, V. Abramenko, V. Aletti, V. Archontis, V. I. Abramenko, V. I. Abramenko, V. I. Abramenko, W. Biskamp   +63 more
core   +2 more sources

Accelerated Knowledge Discovery: A Vision for NASA Science

Earth and Space Science, Volume 13, Issue 3, March 2026.
Abstract This paper introduces the sixth paradigm of scientific discovery: accelerated knowledge discovery (AKD). This paradigm is defined by the full integration of artificial intelligence (AI) into the research workflow as a tool augmenting cognitive capabilities of human scientists.
Rahul Ramachandran, Kaylin Bugbee, Juan Bernabe‐Moreno   +2 more
wiley   +1 more source

Spatially Resolved Transport Parameters in Solar Flares

The Astrophysical Journal
The time profile of solar flare radio emission is often modeled as an injection of energetic particles onto a closed magnetic loop, where they may be trapped by the pinching of field lines and remain for a time before decaying through loss of energy to ...
Brian O’Donnell, Dale Gary
doaj   +1 more source

Silicon abundance from RESIK solar flare observations [PDF]

, 2012
The RESIK instrument on the CORONAS-F spacecraft obtained solar flare and active region X-ray spectra in four channels covering the wavelength range 3.8 -- 6.1 \AA in its operational period between 2001 and 2003. Several highly ionized silicon lines were
Kepa, A., Phillips, K. J. H., Sylwester, B., Sylwester, J.   +3 more
core   +2 more sources

Characterization of Mercury's Atomic and Molecular Hydrogen Exosphere and the First Detection of H2 Ions

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract From 1974 to 1975, the Mariner 10 spacecraft studied Mercury's environment during three flybys and detected hydrogen, helium, and possibly atomic oxygen in the exosphere using its ultraviolet spectrometer, but no molecular hydrogen. Based on the sensitivity of the occultation instrument, an upper limit for the H2 ${\mathrm{H}}_{2}$ surface ...
F. Weichbold, D. Schmid, H. Lammer, M. Volwerk, M. Scherf, N. V. Erkaev, A. Varsani, C. Simon Wedlund, C. Mazelle   +8 more
wiley   +1 more source

Detecting and Classifying Flares in High-resolution Solar Spectra with Supervised Machine Learning

The Astrophysical Journal
Flares are a well-studied aspect of the Sun’s magnetic activity. Detecting and classifying solar flares can inform the analysis of contamination caused by stellar flares in exoplanet transmission spectra.
Nicole Hao, Laura Flagg, Ray Jayawardhana   +2 more
doaj   +1 more source

Peak-intensity energy spectra of intense solar energetic electron events measured with Solar Orbiter in 2020–2022

Astronomy & Astrophysics
Context. The energy spectra of energetic particles offer valuable insights into particle acceleration processes. While the commonly observed spectral breaks in solar energetic electron (SEE) spectra could serve as fingerprints of the acceleration process,
Fedeli Annamaria, Dresing Nina, Gieseler Jan, Warmuth Alexander, Schuller Frederic, Gómez-Herrero Raúl, Jebaraj Immanuel Christopher, Espinosa Francisco, Vainio Rami   +8 more
doaj   +1 more source

The Soft X-Ray and EUV Spectra of Solar Flares [PDF]

International Astronomical Union Colloquium, 1984
The Japanese solar maximum satellite HINOTORI was launched on 21 February 1981, and so far 720 Solar flares were detected including many large flares; the largest observed was a X12 class flare occurred on June 6, 1982. Unfortunately, the data recorder malfunctioned in June, 1982, since then the real time basis observation has been possible to continue.
K. Nishi, K. Tanaka
openaire   +1 more source

Localized Threats: How Ground Conductivity Shapes the Geoelectric Response

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Geomagnetic storms can induce strong geoelectric fields in the ground. These fields drive geomagnetically induced currents in technological conductor systems, such as power grids. In this study, we analyze 4‐hr periods of two such major geomagnetic storms: the Halloween storm (29–31 October 2003) and the 7–8 September 2017 storm.
M. Kellinsalmi, E. Marshalko, L. Juusola, A. Viljanen   +3 more
wiley   +1 more source

Delayed Development of Cool Plasmas in X-Ray Flares from the Young Sun-like Star κ 1 Ceti

The Astrophysical Journal, 2023
The Neutron star Interior Composition Explorer (NICER) X-ray observatory observed two powerful X-ray flares equivalent to superflares from the nearby young solar-like star κ ^1 Ceti in 2019. NICER follows each flare from the onset through the early decay,
Kenji Hamaguchi, Jeffrey W. Reep, Vladimir Airapetian, Shin Toriumi, Keith C. Gendreau, Zaven Arzoumanian   +5 more
doaj   +1 more source