Observations have recently been obtained for other stars. Bruhweiler and Lyu , have further pursued a model suggesting that tidal interactions produce spiral shocks in young planetary systems. A new model is proposed that does not directly require infalling cometary bodies to explain the variable infall.
Results are only preliminary and detailed analyses are planned.
This work used high time resolution UV photometric time sequences obtained with the High Speed Photometer aboard the Hubble Space Telescope using the F240W filter, which is centered near 240 nm and has a 80 nm bandwidth. The occurrence distribution of microflare events is very similar to that determined for flare events observed from the ground. However, a statistical analysis of the background suggests that it may be composed of unresolved nano-flare events with a much steeper distribution than for the resolved events. This is consistent with previous results. Emission measures were determined from the line fluxes and the transition region line profiles were found to have extremely broad winds with a centroid which is offset slightly from a much narrower core, suggesting a multi-component atmosphere.