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20242026
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astro-ph.EP2026

Discovering and Characterising Exoplanets and Ultracool Dwarfs with the Square Kilometre Array

Robert D. Kavanagh, Juan B. Climent, Philippe Zarka +16

The paper discusses how the Square Kilometre Array will enable the detection of low‑frequency radio emission from giant exoplanets and thousands of ultracool dwarfs, allowing chara…

astro-ph.EP2026

Radio emission from star-planet interactions

H. K. Vedantham, A. Strugarek, C. K. Louis +12

Stars interact with their exoplanets though gravity, radiation, plasma and magnetic fields. Stellar plasma and magnetic fields impose electrodynamic effects on exoplanet atmosphere…

astro-ph.EP2026

Close-in planet induces flares on its host star

Ekaterina Ilin, Harish K. Vedantham, Katja Poppenhäger +4

In the past decade, hundreds of exoplanets have been discovered in extremely short orbits below 10 days. Unlike in the Solar System, planets in these systems orbit their host stars…

astro-ph.EP2025

Spectroscopic Characterization of LOFAR Radio-emitting M dwarfs

E. Koo, G. Stefansson, R. D. Kavanagh +20

Recent observations with the LOw Frequency ARray (LOFAR) have revealed 19 nearby M dwarfs showing bright circularly polarised radio emission. One of the possible sources of such em…

astro-ph.EP2025

Searching for planet-induced radio signal from the young close-in planet host star HIP 67522

Ekaterina Ilin, Sanne Bloot, Joseph R. Callingham +1

HIP 67522 is a 17 Myr old 1.2 dwarf, and the only such young star known to host two close-in gas giant planets. The inner planet likely orbits close enough to its host to…

astro-ph.EP2024

Gaia-4b and 5b: Radial Velocity Confirmation of Gaia Astrometric Orbital Solutions Reveal a Massive Planet and a Brown Dwarf Orbiting Low-mass Stars

Gudmundur Stefansson, Suvrath Mahadevan, Joshua Winn +31

Gaia astrometry of nearby stars is precise enough to detect the tiny displacements induced by substellar companions, but radial velocity data are needed for definitive confirmation…