Presentation 1 : Oral
Planetary and Heliospheric Science with LOFAR (PNST)
Philippe Zarka
I will present the LOw Frequency ARray (LOFAR) project, presently in development in Netherlands and in the USA, and discuss its expected impact in planetary and heliospheric science. Planetary objectives include the fast radio imaging of Jupiter's magnetosphere, the search for nonthermal radio emission from extrasolar planets, and the study of solar system planetary lightning. Heliosperic science consists of active and passive solar emission studies (flares, bursts and tracking of shocks and Coronal Mass Ejections), as well as active and passive ionospheric studies. The possible french technical participation to LOFAR will also be mentioned.
Presentation 2 : Oral
Radio search for extrasolar planets (PNP)
Philippe Zarka
Theoretical justification and ongoing observational efforts in view of detecting radio emissions from extrasolar planets will be presented. On the "prediction" side, a heuristic scaling law has been established relating the radio output of any magnetized flowobstacle system to the incident magnetic energy flux on the obstacle. Its confirmation by the observation of radio emission from extrasolar planets would help to understand the energy budget of such a system. On the "detection" side, specific procedures have been developed for interference mitigation and weak burst detection.