Results 71 to 80 of about 10,047 (199)

IRIS Observations of Spicules and Structures Near the Solar Limb

, 2018
We have analyzed IRIS spectral and slit-jaw observations of a quiet region near the South Pole. In this article we present an overview of the observations, the corrections, and the absolute calibration of the intensity.
Alissandrakis, C. E., Buchlin, E., Chane-Yook, M., Koukras, A., Vial, J. -C.   +4 more
core   +2 more sources

PROCESSUS D'ACCÉLÉRATION EN ASTROPHYSIQUE

Le Journal de Physique Colloques, 1975
Des observations très diverses mettent en évidence la présence de particules relativistes dans divers objets astronomiques — éruptions solaires, rayonnement cosmique galactique, sources galactiques et extragalactiques de rayonnement synchrotron (restes de supernovae, noyaux de galaxies, quasars, etc.).
openaire   +2 more sources

Solar Orbiter Observations of a Self‐Consistent Ion‐Scale Magnetic Hole at 0.9AU

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract Magnetic holes (MHs) are localized structures characterized by magnetic field depressions, accompanied by an enhancement in plasma thermal pressure. These pressure‐balanced structures span a broad range of scales in space, from fluid to kinetic regimes. The kinetic‐scale MHs are ubiquitous in the solar wind; however, the exploration is limited
Jing‐Huan Li, Yuri V. Khotyaintsev, Daniel B. Graham, Timothy Horbury, Philippe Louarn   +4 more
wiley   +1 more source

Epsilon Indi Ba, Bb: a spectroscopic study of the nearest known brown dwarfs

, 2008
The discovery of Epsilon Indi Ba and Bb, a nearby binary brown dwarf system with a main-sequence companion, allows a concerted campaign to characterise the physical parameters of two T dwarfs providing benchmarks against which atmospheric and ...
Derek Homeier, Eric Stempels, France Allard, Mark J. McCaughrean, Nicolas Lodieu, Ralf-Dieter Scholz, Robert R. King   +6 more
core   +1 more source

MOST detects corotating bright spots on the mid-O type giant {\xi} Persei [PDF]

, 2014
We have used the MOST (Microvariability and Oscillations of STars) microsatellite to obtain four weeks of contiguous high-precision broadband visual photometry of the O7.5III(n)((f)) star {\xi} Persei in November 2011.
Aerts, Aerts, André-Nicolas Chené, Anthony F. J. Moffat, Auvergne, Baglin, Balona, Balona, Blomme, Boyajian, Briquet, Bumba, Cantiello, Cantiello, Chené, Cox, Cranmer, David B. Guenther, De Cat, de Jong, de Jong, Degroote, Degroote, Dimitar Sasselov, Espinosa, Foukal, Fullerton, Glatzel, Gnevyshev, Henrichs, Henrichs, Henrichs, Henrichs, Henwood, Howarth, Howarth, Howarth, Howarth, Huib F. Henrichs, Hundhausen, Jason F. Rowe, Jaymie M. Matthews, Kaper, Kaper, Kaper, Kiriakidis, Kochukhov, Lenz, Mahy, Massa, Massa, Matthews, Moreno-Insertis, Mullan, Noel D. Richardson, Pamyatnykh, Penny, Petrovay, Pigulski, Prinja, Puls, Rainer Kuschnig, Rauw, Reegen, Repolust, Ringnes, Slavek M. Rucinski, Solanki, Stankov, Sébastien Desforges, Tahina Ramiaramanantsoa, Touhami, Ud-Doula, Uuh-Sonda, van Leeuwen, Victoria Antoci, Wade, Wade, Waldmeier, Walker, Walker, Werner W. Weiss   +81 more
core   +2 more sources

Cassini CAPS‐ELS Observations of Low‐Energy Electron Beams Within Enceladus Mid‐Latitude Flux Tubes

Geophysical Research Letters, Volume 52, Issue 22, 28 November 2025.
Abstract The electrodynamic interaction between Saturn's magnetosphere and Enceladus accelerates electrons along magnetic field lines. These electrons propagate inside magnetic flux tubes connecting the moon to the giant planet, generating distinctive auroral hiss and auroral footprint signatures, both previously observed by the Cassini spacecraft.
J. Rabia, L. Z. Hadid, N. André, Q. Nénon, T. Chust, D. Pisa, A. Parsec‐Wallis, A. J. Coates, A. M. Rymer   +8 more
wiley   +1 more source

The convection of close red supergiant stars observed with near-infrared interferometry

, 2015
Our team has obtained observations of the photosphere of the two closest red supergiant stars Betelgeuse ($\alpha$ Ori) and Antares ($\alpha$ Sco) using near infrared interferometry.
Aurière, Michel, Chiavassa, Andrea, Kervella, Pierre, Montargès, Miguel, Perrin, Guy   +4 more
core   +2 more sources

TRAPPED‐S, a New Environment Model Framework for Saturn: Focus on Radiation‐Specification Model

Journal of Geophysical Research: Space Physics, Volume 130, Issue 11, November 2025.
Abstract As space agencies contemplate missions to the outer planets' systems and moons, entailing prolonged observations via local orbiters or potential landers, meticulous assessment of the local environment—encompassing radiation and plasma conditions—is paramount for the design of both the platform and scientific payload.
A. Sicard, E. Roussos, K. Dialynas, Y. Hao, Q. Nénon, P. Jiggens, F. L. Johansson, A. Kamran   +7 more
wiley   +1 more source

A Novel Neural Network‐Based Approach to Derive a Local Geomagnetic Baseline for Future Robust Characterization of Geomagnetic Indices at Mid‐Latitude

Space Weather
Geomagnetic indices derived from ground magnetic measurements characterize the intensity of solar‐terrestrial interaction. Global magnetic indices derived from multiple magnetic observatories at mid‐latitude have commonly been used for space weather ...
Rungployphan Kieokaew, Veronika Haberle, Aurélie Marchaudon, Pierre‐Louis Blelly, Aude Chambodut   +4 more
doaj   +1 more source

Meso-scale modelling and radiative transfer simulations of a snowfall event over France at microwaves for passive and active modes and evaluation with satellite observations [PDF]

Atmospheric Measurement Techniques, 2015
Microwave passive and active radiative transfer simulations are performed with the Atmospheric Radiative Transfer Simulator (ARTS) for a mid-latitude snowfall event, using outputs from the Meso-NH mesoscale cloud model.
V. S. Galligani, C. Prigent, E. Defer, C. Jimenez, P. Eriksson, J.-P. Pinty, J.-P. Chaboureau   +6 more
doaj   +1 more source