Journal article
Effect of a magnetospheric compression on Jovian radio emissions: In situ case study using Juno data
Journal of geophysical research. Space physics, Vol.128(9), e2022JA031155
09/2023
DOI: 10.1029/2022JA031155
Abstract
Abstract During its polar orbits around Jupiter, Juno often crosses the boundaries of the Jovian magnetosphere (namely the magnetopause and bow shock). From the boundary locations, the upstream solar wind dynamic pressure can be inferred, which in turn illustrates the state of compression or relaxation of the system. The aim of this study is to examine Jovian radio emissions during magnetospheric compressions, in order to determine the relationship between the solar wind and Jovian radio emissions. In this paper, we give a complete list of bow shock and magnetopause crossings (from June 2016 to August 2022), and the associated solar wind dynamic pressure and standoff distances inferred from Joy et al. (2002). We then select two sets of magnetopause crossings with moderate to strong compression of the magnetosphere for two case studies of the response of the Jovian radio emissions. We confirm that magnetospheric compressions lead to the activation of new radio sources. Newly‐activated broadband kilometric emissions are observed almost simultaneously with compression of the magnetosphere, with sources covering a large range of longitudes. Decametric emission sources are seen to be activated more than one rotation later only at specific longitudes and dusk local times. Finally, the activation of narrowband kilometric radiation is not observed until the magnetosphere is in its expansion phase. This article is protected by copyright. All rights reserved.
Key Points This paper provides a list of the Jovian magnetosphere boundary crossings by the Juno spacecraft from June 2016 to August 2022 Jovian magnetospheric compressions lead to increased bKOM radio emissions (immediately) and DAM on the dusk sector (more than one rotation later) nKOM radio emission appears later during relaxation phase of the compression
Details
- Title: Subtitle
- Effect of a magnetospheric compression on Jovian radio emissions: In situ case study using Juno data
- Creators
- C. K. Louis - Université d'OrléansC. M. Jackman - Dublin Institute For Advanced StudiesG. Hospodarsky - University of IowaA. O’Kane Hackett - Dublin Institute For Advanced StudiesE. Devon-Hurley - Dublin Institute For Advanced StudiesP. Zarka - Université Paris Sciences et LettresW. S. Kurth - University of IowaR. W. Ebert - The University of Texas at San AntonioD. M. Weigt - Aalto UniversityA. R. Fogg - Dublin Institute For Advanced StudiesJ. E. Waters - University of SouthamptonS. C. McEntee - Dublin Institute For Advanced StudiesJ. E. P. Connerney - Space Research Corporation Annapolis MD USAP. Louarn - Université de Toulouse CNRS CNES IRAP UPS Toulouse FranceS. Levin - Jet Propulsion Laboratory Pasadena California USAS. J. Bolton - Southwest Research Institute
- Resource Type
- Journal article
- Publication Details
- Journal of geophysical research. Space physics, Vol.128(9), e2022JA031155
- DOI
- 10.1029/2022JA031155
- ISSN
- 2169-9380
- eISSN
- 2169-9402
- Grant note
- DOI: 10.13039/501100001602, name: Science Foundation Ireland, award: 18/FRL/6199; DOI: 10.13039/501100001630, name: Dublin Institute for Advanced Studies, award: 952439; DOI: 10.13039/100000104, name: National Aeronautics and Space Administration, award: 699041X; DOI: 10.13039/100011766, name: Southwest Research Institute; DOI: 10.13039/501100002666, name: Aalto-Yliopisto
- Language
- English
- Electronic publication date
- 08/29/2023
- Date published
- 09/2023
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984460360102771
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