Free Access

Fig. 1


Time, tr, after the explosion at which an ejecta layer characterized by the parameter α encounters the reverse shock. The outer layer has the value α = 1, while the inner one has α = 0. The vertical line indicates the value α = 0.33, corresponding to the ejecta layer which encounters the reverse shock in 2004, and of course intersects the red solid curve at the time corresponding to the age of Cas A in 2004, i.e. tr = 333 yr (indicated by the horizontal line).

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.