Hello Vassilios,
the plot shows the evolution up to a time of roughly 180 (in M_sun)...my first question is: for how long in total was the simulation running? for how much longer is the evolution stable AFTER the BH has been formed? does the code eventually crash or was there only interest in showing the successful collapse and then stop the simulation manually after that point?
I ran the NS collapse run for the paper. Mostly there was only interest in getting the collapse. The code fails shortly after that though (with NaNs inside the AH I think is what it was).
furthermore, in the tov_collapse_vc_l3.par file for the collapse for the paper there the following parameters for a thorn *corecollapsecontrol* the following section:
These have to go. I'll put up a replacement that uses public thorns (CoreCollapseControl is not yet public [though there are no objections to making it public from the author]).
what is this *corecollpasecontrol* thorn doing? and where can it be obtained if it is necessary for successful simulations of NS to BH collapse?
It does many things but we only really need functionality to steer some grid functions.
I attach an updated parameter file which uses Frank Loeffler's Trigger thorn (https://docs.einsteintoolkit.org/et-docs/Thorns_we_know_of). Please let me know if this solves your problem (I only tested that I can start it), then I can (barring protests from the other authors), update the parameter file in the repository.
Yours, Roland