[mesa-users] tracing center_h1

[Ehsan Moravveji]

Hello all,

I would like to trace center_h1 during the main sequence evolution, and
make sure it is monotonically dropping. for this, I know that I must use
the three star_info pointers: xa, xa_old and xa_older in star_data.dek
(now star_data.inc in the new release):

      ! composition variables: xa(j,k) holds mass fraction of species j
for location k
      ! j is an integer from 1 to s% species
      ! chem_id(j) gives the iso identifier from chem_def
      ! net_iso(chem_id(j)) = j
      real(dp), pointer, dimension(:,:) :: xa, xa_old, xa_older

However, I cannot understand what values to assign to j and k
in e.g. xa(j,k).

Can someone please help me with this?

Best regards.
Ehsan.



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