! add any others from the selections in history_columns.list
! comment out with exclamation !
!----------------------------------------------------------------------------------------------

!# general info about the model

      model_number ! counting from the start of the run
      num_zones ! number of zones in the model
       star_age ! elapsed simulated time in years since the start of the run
       log_dt ! log10 time_step in years
      star_mass ! in Msun units
!----------------------------------------------------------------------------------------------

   !## mixing regions

      mass_conv_core ! (Msun) mass coord of top of convective core.  0 if core is not convective

!----------------------------------------------------------------------------------------------

!# nuclear reactions

      log_LH ! log10 power_h_burn
      log_LHe ! log10 power_he_burn
      log_Lnuc ! log(LH + LHe + LZ)

   !## information about reactions (by category)

      pp
      cno
      tri_alfa

!----------------------------------------------------------------------------------------------

!# information about core and envelope

      he_core_mass
      c_core_mass
      o_core_mass
      !si_core_mass
      !fe_core_mass
      !neutron_rich_core_mass
!----------------------------------------------------------------------------------------------

!# conditions at or near the surface of the model

      log_Teff ! log10 effective temperature
      log_L ! log10 luminosity in Lsun units
      log_R ! log10 radius in Rsun units
      log_g ! log10 gravity
!----------------------------------------------------------------------------------------------

!# conditions near center

      log_cntr_P
      log_cntr_Rho
      log_cntr_T
      center_mu
!----------------------------------------------------------------------------------------------

!# abundances

      ! individual central mass fractions (as many as desired)
      center h1
      center he4
      center c12
      center o16
      center n14 

   !## mass fractions near surface

      surface h1
      surface he4
      surface c12
      surface o16
      surface n14

      total_mass h1
      total_mass he4