Exoplanet search with LOFAR

Wednesday, 9. December 2015, 16:15 - 
Location Bibliothek

Dr. Jean-Mathias Griessmeier, LPC2E - University of Orléans / CNRS & Nançay Radio Observatory, Observatoire de Paris - CNRS/INSU, France

Exoplanet search with LOFAR

Planetary magnetic fields have an important effect on the planetary environment and its evolution. For extrasolar planets, magnetic fields are supposed to exist, but to date, they have never been detected. We will show that the most promising technique to observe exoplanetary magnetic fields is to search for the planetary auroral radio emission. A coherent emission analog to that of Jupiter could be detectable if the emission is at least 1000 times more intense than Jupiter's emission. Recently, a number of models have suggested that the radio emission of giant extrasolar planets may indeed reach such intensities. We will review recent theoretical studies and discuss the results for the two main parameters, namely the maximum emission frequency and the intensity of the radio emission. The predicted values should allow the detection using modern low-frequency radio telescopes. We will present observations with the Low Frequency Array (LOFAR), which have the potential to finally detect exoplanetary radio emission and exoplanetary magnetic fields.

 



: Dr. Jean-Mathias Griessmeier, LPC2E - University of Orléans, France