Studying Exoplanets in the Radio from the Moon
Jake D. Turner, Jack O. Burns, David Rapetti, Philippe Zarka, Jean-Mathias Grie{\ss}meier, Judd Bowman, Gregg Hallinan, Joshua Hibbard, Johnny Dorigo Jones, Laurent Lamy, Corentin K. Louis, Richard Lovelace, Nivedita Mahesh, Ronald Polidan, Xiang Zhang

TL;DR
This paper proposes using lunar-based radio telescopes to detect low-frequency auroral emissions from exoplanets, overcoming Earth's ionospheric limitations and enabling new insights into exoplanet magnetic fields and habitability.
Contribution
It outlines a strategic plan for lunar radio arrays to study exoplanet magnetospheres, including upcoming missions and future large-scale arrays like FarView and FARSIDE.
Findings
Upcoming lunar missions will set upper limits on exoplanet radio flux below 10 MHz.
Lunar arrays can detect magnetic fields of diverse exoplanets, including terrestrial ones.
Potential to significantly advance understanding of exoplanet habitability and magnetic properties.
Abstract
Exoplanets with and without a magnetic field are predicted to form, behave, and evolve very differently. Therefore, there is great need to directly constrain these fields to holistically understand the properties of exoplanets including their potential habitability. This goal aligns with the Astro2020 Decadal Survey recommendations. Observing planetary auroral radio emissions is among the most promising detection methods, but decades of searching have yet to yield a conclusive detection, though promising hints are now emerging from ground-based radio telescopes. However, these ground-based efforts are fundamentally limited by Earth's ionosphere, which blocks the low-frequency signals (<10 MHz) expected from terrestrial and Neptune-like exoplanets. In this white paper, we outline a strategy to overcome this barrier by utilizing the unique environment of the Moon. We discuss how the…
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