Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Joshua Dreyer"'
Helium ions, He+, react only slowly with molecular hydrogen. A consequence of this is that He+ ions produced by, for example, photoionization of He in H2-dominated ionospheres, such as those of Jupiter and Saturn, can have principal loss mechanisms o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2e63fc6ad9eac2635778efb828ad7ed
https://doi.org/10.5194/egusphere-egu23-14642
https://doi.org/10.5194/egusphere-egu23-14642
Deriving mixing ratios of heavier neutral species in Saturn's ionosphere from light ion measurements
Autor:
Joshua Dreyer, Erik Vigren
Helium ions, He+, react only slowly with molecular hydrogen. A consequence of this is that He+ ions produced by, for example, photoionization of He in H2-dominated ionospheres, such as those of Jupiter and Saturn, can have principal loss mechanisms o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33d9cdee5fe7fe6cf1e9434d3cc9c5ce
https://doi.org/10.5194/epsc2022-1053
https://doi.org/10.5194/epsc2022-1053
Autor:
Lisa Baddeley, Daniel Whiter, Noora Partamies, Joshua Dreyer, Stephan Buchert, Pål Gunnar Ellingsen
Publikováno v:
Annales Geophysicae, Vol 39, Pp 277-288 (2021)
Annales Geophysicae
Annales Geophysicae
This study analyses the observations of a new type of small-scale aurora-like feature, which is further referred to as fragmented aurora-like emission(s) (FAEs). An all-sky camera captured these FAEs on three separate occasions in 2015 and 2017 at th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d4bf0c06e0c5601421b475d37f251eb9
https://doi.org/10.5194/angeo-39-277-2021
https://doi.org/10.5194/angeo-39-277-2021
Autor:
Joshua Dreyer, Noora Partamies, Daniel Whiter, Pål G. Ellingsen, Lisa Baddeley, Stephan C. Buchert
We present observations of a new type of small-scale aurora-like feature, which is further referred to as fragmented aurora-like emission(s) (FAEs).They seem to appear in two categories – randomly occurring individual FAEs and wave-like structures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54ef1c94ee135f45acbb5dcb8ce604c5
https://doi.org/10.5194/egusphere-egu22-5686
https://doi.org/10.5194/egusphere-egu22-5686
Autor:
Joshua Dreyer, Erik Vigren, Oleg Shebanits, Michiko Morooka, Jan-Erik Wahlund, Jack Hunter Waite
During the Grand Finale of the Cassini mission, the southern hemisphere of Saturn was shadowed by its rings and the substructures within, whose more intense shadows can be mapped to specific ionospheric altitudes. We successfully connect small-scale
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9487699a90c6cbf23ae5110d664df2f6
https://doi.org/10.5194/epsc2021-753
https://doi.org/10.5194/epsc2021-753
Autor:
Joshua Dreyer, Erik Vigren
During the Grand Finale of the Cassini mission, the southern hemisphere of Saturn was shadowed by its rings and the substructures within, whose more intense shadows can be mapped to specific ionospheric altitudes. We successfully connect small-scale
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f24d8110558317b3ea2c71b415165079
https://doi.org/10.5194/egusphere-egu21-13316
https://doi.org/10.5194/egusphere-egu21-13316
Autor:
Joshua Dreyer, Erik Vigren, Fredrik L. Johansson, Oleg Shebanits, Michiko Morooka, Jan-Erik Wahlund, Rebecca S. Perryman, Jack Hunter Waite
Publikováno v:
The Planetary Science Journal. 3:168
For orbits 288 and 292 of Cassini’s Grand Finale, clear dips (sharp and narrow decreases) are visible in the H 2 + densities measured by the Ion and Neutral Mass Spectrometer (INMS). In 2017, the southern hemisphere of Saturn was shadowed by its ri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb86b2d39ed81375b8cf38244f00c634
https://doi.org/10.3847/psj/ac7790
https://doi.org/10.3847/psj/ac7790
Autor:
Daniel K. Whiter, Hanna Dahlgren, Betty S. Lanchester, Joshua Dreyer, Noora Partamies, Nickolay Ivchenko, Marco Zaccaria Di Fraia, Rosie Oliver, Amanda Serpell-Stevens, Tiffany Shaw-Diaz, Thomas Braunersreuther
Fragmented Aurora-like Emissions (FAEs) are small (few km) optical structures which have been observed close to the poleward boundary of the aurora from the high-latitude location of Svalbard (magnetic latitude 75.3 ° N). The FAEs are only visible i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adae8abe05eb3a1d568edb3eebcb9633
https://doi.org/10.5194/angeo-2020-95
https://doi.org/10.5194/angeo-2020-95
Autor:
Michiko Morooka, Joshua Dreyer, Stephan Buchert, J. H. Waite, Erik Vigren, Fredrik Johansson, Jan-Erik Wahlund
The present study combines Radio and Plasma Wave Science/Langmuir Probe and Ion and Neutral Mass Spectrometer data from Cassini’s last four orbits into Saturn’s lower ionosphere to constrain the effective recombination coefficient α 300 from mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6796016d3d535e3d9e762937594c5d99
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-458301
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-458301