Giuseppe Nistico (Institut für Astrophysik, University of Goettingen): 'Observations of comets in the inner heliosphere'
Abstract: In my talk, I will present the complex interaction of comets with the heliospheric environment. As comets approach their perihelium, a tail of dust and plasma is formed from their nucleus. This interacts with the local solar wind exhibiting an oscillatory dynamics, which is analogous to the physics of an object immersed in a turbulent flow. The parameters of the tail oscillations depend on the size of the comet nucleus and the local temporal/spatial variations of the solar wind. Exploiting recent observations of comets from space probes, we quantify these parameters and relate them to the local conditions of the interplanetary medium.