[mesa-users] iron core infall

[Bill Paxton]

On May 2, 2012, at 11:42 AM, Manos Chatzopoulos wrote:

> Hi Bill,
> 
> I just successfully run a 30 solar mass star of solar metallicity up to iron core collapse. In MESA, that seems to be signaled with an output message through the last
> runs saying
> "iron_core_infall    1.0202356679417457E+08    1.0000000000000000E+08
> 
> stop because iron_core_infall > iron_core_infall_limit"
> How is that limit defined? In terms of velocity? I am comparing the last MESA output for this model to the one Heger posts in his website and find some differences in burning
> stages by time of "iron core collapse" and try to figure out how is that exactly determined in MESA. Can iron_core_infall_limit be changed? Certainly not from the inlist file right?
> 
> Thanks,
> 
> Manos
> 


Hi Manos,

Search for "iron" in star/public/star_defaults.dek

Burning lifetimes in mesa are different than in KEPLER for unknown reasons (see Table 12 in mesa instrument paper).
However, note that the lifetimes for the other codes also show a lot of variation as do the core masses (again, see tables 12 & 13).

Someday somebody should figure out what's going on!  Volunteers?  ;-)

-B