Evidence for low density holes in Jupiter’s ionosphere

0505895 - ÚFA 2020 RIV GB eng J - Journal Article
Imai, M. - Kolmašová, Ivana - Kurth, W. S. - Santolík, Ondřej - Hospodarsky, G. B. - Gurnett, D. A. - Brown, S. T. - Bolton, S.J. - Connerney, J. E. P. - Levin, S. M.
Evidence for low density holes in Jupiter’s ionosphere.
Nature Communications. Roč. 10, JUN 21 (2019), č. článku 2751. E-ISSN 2041-1723
Grant - others:AV ČR(CZ) MSM100421701; AV ČR(CZ) AP1401
Program: Program na podporu mezinárodní spolupráce začínajících výzkumných pracovníků; Akademická prémie - Praemium Academiae
Institutional support: RVO:68378289
Keywords : VOYAGER-1
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 12.121, year: 2019
Method of publishing: Open access
https://www.nature.com/articles/s41467-019-10708-w

Intense electromagnetic impulses induced by Jupiter’s lightning have been recognised to produce both low-frequency dispersed whistler emissions and non-dispersed radio pulses. Here we report the discovery of electromagnetic pulses associated with Jovian lightning. Detected by the Juno Waves instrument during its polar perijove passes, the dispersed millisecond pulses called Jupiter dispersed pulses (JDPs) provide evidence of low density holes in Jupiter’s ionosphere. 445 of these JDP emissions have been observed in snapshots of electric field waveforms. Assuming that the maximum delay occurs in the vicinity of the free space ordinary mode cutoff frequency, we estimate the characteristic plasma densities (5.1 to 250 cm−3) and lengths (0.6 km to 1.3 × 105 km) of plasma irregularities along the line of propagation from lightning to Juno. These irregularities show a direct link to low plasma density holes with ≤250 cm−3 in the nightside ionosphere.
Permanent Link: http://hdl.handle.net/11104/0297245