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We present new spectral diagnostics available from HR15n spectra of stars in the gamma2 Vel cluster, useful for classification and determination of fundamental stellar parameters. We define several spectroscopic indices, sampling the amplitude of TiO bands, the H-alpha line core and wings, and temperature- and gravity-sensitive sets of lines, each useful as a temperature or gravity indicator over a limited

Coronal Mass Ejections (CMEs) are one of the most violent phenomena found on the Sun. One model to explain their occurrence is the flux rope ejection model. In this model, magnetic flux ropes form slowly over time periods of days to weeks. They then loose equilibrium and are subsequently ejected from the solar corona over a few hours. The contrasting