Radio emission in Mercury magnetosphere
J. Varela, V. Reville, A. S. Brun, F. Pantellini, P. Zarka

TL;DR
This study models Mercury's magnetosphere to quantify its radio emissions influenced by solar wind and magnetic field interactions, providing insights relevant for exoplanet magnetic field characterization.
Contribution
It presents a detailed MHD simulation approach to estimate Mercury's radio emission levels considering various solar wind and magnetic field conditions, advancing understanding of planetary radio emissions.
Findings
Radio emission distribution depends on IMF orientation.
Total radio emission estimated between 5×10^5 and 2×10^6 W.
Radio hot spots are located on the planet's day side.
Abstract
Context: Active stars possess magnetized wind that has a direct impact on planets that can lead to radio emission. Mercury is a good test case to study the effect of the solar wind and interplanetary magnetic field on radio emission driven in the planet magnetosphere. Such studies could be used as proxies to characterize the magnetic field topology and intensity of exoplanets. Aims: The aim of this study is to quantify the radio emission in the Hermean magnetosphere. Methods: We use the MHD code PLUTO in spherical coordinates with an axisymmetric multipolar expansion for the Hermean magnetic field, to analyze the effect of the interplanetary magnetic field (IMF) orientation and intensity, as well as the hydrodynamic parameters of the solar wind (velocity, density and temperature), on the net power dissipated on the Hermean day and night side. We apply the formalism derived by Zarka…
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