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Depleted Plasma Densities in the Ionosphere of Venus Near Solar Minimum From Parker Solar Probe Observations of Upper Hybrid Resonance Emission
Author(s) -
Collinson Glyn A.,
Ramstad Robin,
Glocer Alex,
Wilson Lynn,
Brosius Alexandra
Publication year - 2021
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2020gl092243
Subject(s) - venus , ionosphere , solar cycle , atmosphere of venus , physics , solar maximum , solar minimum , plasma , astronomy , electron density , atmospheric sciences , solar wind , solar cycle 22 , astrobiology , quantum mechanics
On July 11, 2020, NASA’s Parker Solar Probe made its third flyby of Venus. The upper hybrid resonance emission was observed below 1,100 km (a first at Venus), revealing electron densities an order of magnitude lower than at solar maximum. These observations are consistent with a substantial variation in the density and structure of the Venusian ionosphere over the Solar Cycle.