[mesa-users] Information

Bill Wolf wmwolf at physics.ucsb.edu
Sun Jul 23 20:12:27 EDT 2017


HI Abdel,

From $MESA_DIR/star/defaults/history_columns.list right before epsnuc_M_1 and friends:

   !## regions of strong nuclear burning

      ! 2 zones where eps_nuc > burn_min1 erg/g/s
      ! for each zone have 4 numbers: start1, start2, end2, end1
      ! start1 is mass of inner edge where first goes > burn_min1 (or -20 if none such)
      ! start2 is mass of inner edge where first zone reaches burn_min2 erg/g/sec (or -20 if none such)
      ! end2 is mass of outer edge where first zone drops back below burn_min2 erg/g/s
      ! end1 is mass of outer edge where first zone ends (i.e. eps_nuc < burn_min1)
      ! similar for the second zone

and then from $MESA_DIR/star/defaults/controls.list:


         !### burn_min1

         ! used for reporting where burning zone occur, for example in the pgstar TRho profiles.
         ! see `star/public/star_data.inc` for details.
         ! must be < `burn_min2`.
         ! In ergs/g/sec.

      burn_min1 = 50

         !### burn_min2

         ! used for reporting where burning zone occur, for example in the pgstar TRho profiles.
         ! see `star/public/star_data.inc` for details.
         ! In ergs/g/sec.

      burn_min2 = 1000


So you set burn_min1 and burn_min2 in your inlist, and then in your output, you get the mass coordinates showing where eps_nuc is greater than these values. It’s a way of tracking the size and locations of regions of strong burning. Between M(r) = eps_nuc_M1 and M(r) = eps_nuc_M4, eps_nuc > burn_min1. Between M(r) = eps_nuc_M2 and M(r) = eps_nuc_M3, eps_nuc > burn_min2.

Similar story for the next 4, which deal with the next most massive burning zone (I would assume).

Regards,

Bill
________________________ 
William Wolf 
wmwolf at physics.ucsb.edu 

UCSB Department of Physics 

On July 23, 2017 at 5:03:27 PM, AbdelBassit Abdessamed Senhadji (sen-abd at hotmail.fr) wrote:

Hi MESA users :

 

Please, is it possible to know what is the meaning of : epsnuc_M_1 and it goes to epsnuc_M_8.

 

Thanks

 

Abdel

 

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