A Global Map of Average Electron Densities in the Magnetosphere of Saturn
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F25%3A00639926" target="_blank" >RIV/68378289:_____/25:00639926 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/25:10510593
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JA034007" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JA034007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2025JA034007" target="_blank" >10.1029/2025JA034007</a>
Alternative languages
Result language
angličtina
Original language name
A Global Map of Average Electron Densities in the Magnetosphere of Saturn
Original language description
Measurements from the Cassini Radio and Plasma Wave Science (RPWS) experiment obtained during the entire orbital phase of the Cassini mission around Saturn (13.2 years) are processed into a meridional map of plasma densities, comprising the innermost region of the ring ionosphere, the Enceladus plasma torus, and the outer magnetosphere, up to a dipole L-shell of 30. We combine data from RPWS wave observations, such as whistler-mode waves and upper hybrid electrostatic emissions, and from the RPWS Langmuir probe when operated in the proxy mode, providing an estimate for the spacecraft potential. In the region between dipole L-shells of 2.4 and 30, observed electron densities are described by an analytic model that fits two functions, one for the water group ions and one for the protons, to observed densities across latitude on each magnetic field line. The derived electron density profiles are then augmented by a model for the cold core electron temperature as a function of L-shell to obtain a meridional map of the electrostatic potential of the ambipolar electric field. The potential is extrapolated to the inner region of the rings, i.e., to below L=2.4 , to solve for the distribution of electron density in the ring ionosphere. A solution is based on a diffusive equilibrium model for the electrons and two ion species, and on observations from Cassini along the Saturn Orbit Insertion trajectory. A combination of analytic and diffusive equilibrium results finally yields an average global picture for the distribution of electron density in Saturn's magnetosphere.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Space Physics
ISSN
2169-9380
e-ISSN
2169-9402
Volume of the periodical
130
Issue of the periodical within the volume
10
Country of publishing house
US - UNITED STATES
Number of pages
24
Pages from-to
e2025JA034007
UT code for WoS article
001586663700001
EID of the result in the Scopus database
2-s2.0-105018329756