Feed-back Relation between Flares-CMEs

The increase in knowledge of high energetic solar events, like flares and coronal mass ejections (CMEs), is of tremendous importance because of their impacts on the Earths atmosphere. Accelerated particles might affect telecommunication, the performance of satellites in the Earths orbit and moreover endanger humans in space. On the wake of the large solar flares in October and November 2003, electric currents were induced in power grids which even caused power outages in Europe. A successful forecasting of these large disturbances would decrease the risk of dangers and this demands much better knowledge of their causing/driving processes. In the proposed project we will address the topic of energy release in solar flares and their connection to CMEs by studying solar eruptive processes observed on different spatial scales over a broad wavelength range from X-rays to radio. Thus the analyses will be performed collectively on the basis of ground-based as well as space-borne observations. We will act on the assumption that large flares are a consequence of eruptions that provide a prolonged CME acceleration launching the eruption into interplanetary space. We aim at three main goals: 1) determine the basic driving mechanism of CMEs; 2) study details on the flare energy release; 3) examine the role of reconnection in the flare to the CME acceleration. These objectives shall be achieved by 1) gaining better knowledge of the relative kinematics of the CME three-part structure, 2) performing multi-wavelength studies, and 3) analyzing HXR observations for particle acceleration processes and comparisons to the CME acceleration time profile. Performing the here proposed project, by the combination of observational and theoretical data analyses our goal is to understand the feed-back relation between flares and CMEs as a whole.