Results 1 to 10 of about 11,148 (232)

Oxygen torus and its coincidence with EMIC wave in the deep inner magnetosphere: Van Allen Probe B and Arase observations [PDF]

Earth, Planets and Space, 2020
We investigate the longitudinal structure of the oxygen torus in the inner magnetosphere for a specific event found on 12 September 2017, using simultaneous observations from the Van Allen Probe B and Arase satellites. It is found that Probe B observed a
M. Nosé, A. Matsuoka, A. Kumamoto, Y. Kasahara, M. Teramoto, S. Kurita, J. Goldstein, L. M. Kistler, S. Singh, A. Gololobov, K. Shiokawa, S. Imajo, S. Oimatsu, K. Yamamoto, Y. Obana, M. Shoji, F. Tsuchiya, I. Shinohara, Y. Miyoshi, W. S. Kurth, C. A. Kletzing, C. W. Smith, R. J. MacDowall, H. Spence, G. D. Reeves   +24 more
doaj   +7 more sources

Formation of the oxygen torus in the inner magnetosphere: Van Allen Probes observations [PDF]

Journal of Geophysical Research: Space Physics, 2015
AbstractWe study the formation process of an oxygen torus during the 12–15 November 2012 magnetic storm, using the magnetic field and plasma wave data obtained by Van Allen Probes. We estimate the local plasma mass density (ρL) and the local electron number density (neL) from the resonant frequencies of standing Alfvén waves and the upper hybrid ...
M. Nosé, S. Oimatsu, K. Keika, C. A. Kletzing, W. S. Kurth, S. De Pascuale, C. W. Smith, R. J. MacDowall, S. Nakano, G. D. Reeves, H. E. Spence, B. A. Larsen   +11 more
core   +9 more sources

Inner Magnetospheric Oxygen Torus Induced by Electromagnetic Ion Cyclotron Waves

Geophysical Research Letters
Cold oxygen ions escaping from the ionosphere and temporarily trapped near the plasmapause form the oxygen torus. Mass‐loading by these oxygen ions significantly affects magnetospheric plasma processes.
Zhiyong Wu, Zhenpeng Su, Huinan Zheng, Yuming Wang   +3 more
doaj   +4 more sources

Longitudinal Structure of Oxygen Torus in the Inner Magnetosphere: Simultaneous Observations by Arase and Van Allen Probe A [PDF]

Geophysical Research Letters, 2018
AbstractSimultaneous observations of the magnetic field and plasma waves made by the Arase and Van Allen Probe A satellites at different magnetic local time (MLT) enable us to deduce the longitudinal structure of an oxygen torus for the first time. During 04:00–07:10 UT on 24 April 2017, Arase flew from L = 6.2 to 2.0 in the morning sector and detected
M. Nosé, A. Matsuoka, A. Kumamoto, Y. Kasahara, J. Goldstein, M. Teramoto, F. Tsuchiya, S. Matsuda, M. Shoji, S. Imajo, S. Oimatsu, K. Yamamoto, Y. Obana, R. Nomura, A. Fujimoto, I. Shinohara, Y. Miyoshi, W. S. Kurth, C. A. Kletzing, C. W. Smith, R. J. MacDowall   +20 more
openaire   +3 more sources

Uncovering the integral spectral characteristics of the planetary nebula IC 4642 [PDF]

Scientific Reports
We report the first comprehensive spectroscopic analysis of the Galactic planetary nebula (PN; plural: PNe) IC 4642, using low-dispersion integral field unit (IFU) observations.
Mahmoud Mohery, Alaa Ali, Kholoud Ahmed Hamam, Aya Atef Khames, Abdullah Saad Alsubaie   +4 more
doaj   +2 more sources

Counterstreaming Cold H+, He+, O+, and N+ Outflows in the Plasmasphere

Frontiers in Astronomy and Space Sciences, 2021
The Naval Research Laboratory (NRL) Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere code is used to examine H+, He+, N+, and O+ thermal outflows during a storm.
J. Krall, J. D. Huba
doaj   +1 more source

Field Line Resonances and Cavity Modes at Earth and Jupiter

Frontiers in Astronomy and Space Sciences, 2022
Ultra-Low-Frequency (ULF) waves provide a means for the rapid propagation of energy and field-aligned current in planetary magnetospheres. At Earth, the ULF frequency range is usually defined as including waves with periods of 0.2–600 s; however, at ...
Robert L. Lysak
doaj   +1 more source

Io’s Optical Aurorae in Jupiter’s Shadow

The Planetary Science Journal, 2023
Decline and recovery timescales surrounding eclipse are indicative of the controlling physical processes in Io’s atmosphere. Recent studies have established that the majority of Io’s molecular atmosphere, SO _2 and SO, condenses during its passage ...
Carl Schmidt, Mikhail Sharov, Katherine de Kleer, Nick Schneider, Imke de Pater, Phillip H. Phipps, Albert Conrad, Luke Moore, Paul Withers, John Spencer, Jeff Morgenthaler, Ilya Ilyin, Klaus Strassmeier, Christian Veillet, John Hill, Mike Brown   +15 more
doaj   +1 more source

Does Ring Current Heating Generate the Observed O+ Shell?

Geophysical Research Letters, 2020
The Naval Research Laboratory (NRL) Sami3 is Also a Model of the Ionosphere (SAMI3) ionosphere/plasmasphere code is used to examine the effect of ring current heating during a storm. With a ring current heating function added to SAMI3, a cold thermal (
J. Krall, J. D. Huba, M.‐C. Fok
doaj   +1 more source

Neutral oxygen and sulfur densities in the Io torus

The Astrophysical Journal, 1986
Ultraviolet spectra (1150-1750 A) of the Io torus, obtained using a rocket-borne telescope and spectrometer in May 1981, show emissions of neutral sulfur and neutral oxygen, as well as ionic emissions of S II, S III, and S IV. The emissions are observed almost 180 deg from the location of the satellite Io and imply the existence of an extended neutral ...
T. E. Skinner, S. T. Durrance
openaire   +1 more source