Results 91 to 100 of about 15,087 (215)

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

Influence of Mars Topography on Neutral Surface Radiation: Modeling and MSL/RAD Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 3, March 2026.
Abstract Since landing in 2012, the Radiation Assessment Detector (RAD) onboard the Mars science laboratory (MSL) Curiosity rover has encountered different local landscapes, which have induced variations in the local surface environment. The aim of this study is to include realistic and site‐specific local topography for any position in a radiation ...
Gabin Charpentier, Bent Ehresmann, Jingnan Guo, Salman Khaksarighiri, Rémi Bénacquista, Jean Christophe Malapert, Robert Ecoffet, Julien Mekki, Alexis Paillet, Sven Löffler, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Cary Zeitlin, Philippe Valet, Yves Gourinat   +14 more
wiley   +1 more source

Solar origins of coronal mass ejections [PDF]

The large scale properties of coronal mass ejections (CMEs), such as morphology, leading edge speed, and angular width and position, have been cataloged for many events observed with coronagraphs on the Skylab, P-78, and SMM spacecraft.
Kahler, Stephen
core   +1 more source

Solar Coronal Mass Ejection and Post–Coronal Mass Ejection Blob Formation in Two-fluid Simulations

The Astrophysical Journal
Abstract A coronal mass ejection (CME) and post-CME blob phenomena in the solar atmosphere, associated with shear flow and convergent flow perturbations in the photosphere, are investigated using a resistive two-fluid (electron–ion) code. It is found that there are notable deviations between the two-fluid and previous magnetohydrodynamic
J. C. Du, Z. W. Ma
openaire   +2 more sources

Solar flares, coronal mass ejections and solar energetic particle event characteristics

Journal of Space Weather and Space Climate, 2016
A new catalogue of 314 solar energetic particle (SEP) events extending over a large time span from 1984 to 2013 has been compiled. The properties as well as the associations of these SEP events with their parent solar sources have been thoroughly ...
Papaioannou Athanasios, Sandberg Ingmar, Anastasiadis Anastasios, Kouloumvakos Athanasios, Georgoulis Manolis K., Tziotziou Kostas, Tsiropoula Georgia, Jiggens Piers, Hilgers Alain   +8 more
doaj   +1 more source

Observations on a series of merging magnetic flux ropes within an interplanetary coronal mass ejection

, 2018
Coronal mass ejections (CMEs) are intense solar explosive eruptions. CMEs are highly important players in solar-terrestrial relationships, and they have important consequences for major geomagnetic storms and energetic particle events.
Feng, Hengqiang, Liu, Qiang, Wu, Dejin, Zhao, Guoqing, Zhao, Yan   +4 more
core   +1 more source

Coronal Mass Ejections and Solar Radio Emissions (invited) [PDF]

PLANETARY RADIO EMISSIONS VII, 2011
Three types of low-frequency nonthermal radio bursts are associated with coronal mass ejections (CMEs): Type III bursts due to accelerated electrons propagating along open magnetic field lines, type II bursts due to electrons accelerated in shocks, and type IV bursts due to electrons trapped in post-eruption arcades behind CMEs.
openaire   +1 more source

Two classes of solar energetic particle events associated with impulsive and long duration soft X-ray flares [PDF]

Solar energetic particle events observed in space have different properties depending on the class of associated flare. Impulsive flares, which occur low in the corona in regions of high energy density, are associated with particle events which are ...
Cane, H. V., Mcguire, R. E., Vonrosenvinge, T. T.   +2 more
core   +1 more source

Solar flares with and without SOHO/LASCO coronal mass ejections and type II shocks

, 2010
We analyse of a set of radio rich (accompanied by type IV or II bursts) solar flares and their association with SOHO/LASCO Coronal Mass Ejections in the period 1998 2000. The intensity, impulsiveness and energetics of these events are investigated.
A. Hillaris, A. Kontogeorgos, Andrews, C. Alissandrakis, C. Caroubalos, C. Vassiliou, Caroubalos, Classen, E. Mitsakou, Falconer, G. Dumas, Garcia, Harra, Harrison, J. Polygiannakis, J.-L. Bougeret, Kahler, Kay, Magdalenic, Moon, Nindos, P. Preka-Papadema, P. Tsitsipis, Pearson, Sheeley, V. Petousis, Venkatakrishnan, Vrsnak, Vrsnak, X. Moussas   +29 more
core   +1 more source

Large-scale Coronal Dimming Foreshadowing a Solar Eruption on 2011 October 1

The Astrophysical Journal
Understanding large-scale solar eruptions requires detailed investigation of the entire system’s evolution, including the magnetic environment enveloping the source region and searches for precursor activity prior to event onset.
Chunming Zhu, C. Richard DeVore, Joel T. Dahlin, Jiong Qiu, Maria D. Kazachenko, Vadim M. Uritsky, Jackson S. Vandervelde   +6 more
doaj   +1 more source