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We report the first results of a magnetohydrodynamic (MHD) simulation of thedevelopment of a homologous sequence of three coronal mass ejections (CMEs) anddemonstrate their so-called cannibalistic behavior. These CMEs originate fromthe repeated formations and partial eruptions of kink unstable flux ropes as aresult of continued emergence of a twisted flux rope across the lower boundaryinto a pre-existing coronal potential arcade field. The simulation shows that aCME erupting into the open magnetic field created by a preceding CME has ahigher speed. The second of the three successive CMEs simulated iscannibalistic catching up and merging with the first into a single fast CMEbefore exiting the domain. All the CMEs including the leading merged CME,attained speeds of about 1000 km/s as they exit the domain. The reformation ofa twisted flux rope after each CME eruption during the sustained flux emergencecan naturally explain the X-ray observations of repeated reformations ofsigmoids and "sigmoid-under-cusp" configurations at a low-coronal source ofhomologous CMEs.

Simulation of homologous and cannibalistic Coronal Mass Ejections produced by the emergence of a twisted flux rope into the Solar Corona