BEGIN:VCALENDAR VERSION:2.0 PRODID:-//AIP Calendar//www.aip.de// BEGIN:VEVENT SUMMARY:Colloquium | Antoine Strugarek (CEA Paris-Saclay\, France) DTSTART:20261015T123000Z DTEND:20261015T133000Z DTSTAMP:20261024T004119Z UID:www.aip.de-2353 CATEGORIES:Scientific CATEGORIES:Scientific Talk CATEGORIES:Public CATEGORIES:Colloquium CONTACT:Julián Alvarado-Gómez DESCRIPTION:Speaker: Antoine Strugarek (CEA Paris-Saclay\, France)\nTitle: Star-planet magnetic interaction: recent discoveries and challenges ahead \nAbstract: Over the last two decades\, a large population of close-in pla nets has been detected around a wide variety of host stars. These planets are thought to strongly interact with their host stars through intense irr adiation\, tidal forces\, and interactions with the magnetized stellar atm osphere and wind in which they orbit. Can we leverage these interactions t o better constrain the properties of both the planets and their host stars ? In particular\, can we use them to probe planetary magnetic fields?\nIn this talk\, I will report on recent progress made through the ongoing ExoM agnets ERC project at CEA Paris-Saclay. I will first review the observatio nal evidence for star-planet magnetic interactions (SPMI) and present a ne w\, unambiguous detection in the HD 189733 system\, as well recent attempt s in detecting such signal in radio. I will then present new modeling effo rts designed to capture the complex connectivity and energetics of these i nteractions.\nThe classical interpretation of SPMI attributes stellar chro mospheric hotspots to wave-driven energy deposition. I will present detail ed modeling of how this process unfolds and what it implies for stellar ac tivity tracers. However\, the observed high emission levels challenge this classical scenario. Drawing a parallel to Comet Lovejoy in the solar syst em\, I will show that SPMI may instead act as a trigger for pre-existing s tellar active regions.\nFinally\, I will discuss the impact of SPMIs on th e exoplanets themselves. Specifically\, these interactions can induce sign ificant Ohmic heating in upper atmospheres\, altering temperature profiles and atmospheric escape rates. I will conclude by introducing astroSPI\, a n upcoming open-source tool designed to model SPMI properties for specific systems using state-of-the-art constraints on key planetary and stellar p arameters.\nNote: Hosts: Ilaria Civale and Katja Poppenhäger\n LOCATION:AIP\; Kirch building\, Conference room END:VEVENT END:VCALENDAR