.. _pisn: **** pisn **** .. tags:: star, very-massive-star, pair-instability, pair-instability-supernova, supernova, carbon-burning, oxygen-burning, explosive-burning This test case evolves an initially 200 |Msun| star from ZAMS until it undergoes a pair instability supernovae (PISN) Physical checks =============== This tracks the central value of (Gamma1 - 4/3) and the point when the pressure weighted integral of Gamma1-4/3 (integral_gamma1) first drops below 0. This value should be 0 or negative otherwise we do not have a PISN but instead PPISN (`Renzo et al (2020) `__) Inlists ======= This test case has seven parts. * Part 1 (``inlist_make_late_pre_zams``) This creates a 200 |Msun| Z=1.6*10\ :sup:`-3` model * Part 2 (``inlist_to_zams_header``) This evolves the model to just before the MS starts * Part 3 (``inlist_to_end_core_he_burn``) This takes the model up to the end of core helium burning * Part 4 (``inlist_remove_envelope_header``) This removes what'ss left of the hydrogen envelope * Part 5 (``inlist_to_end_core_c_burn``) This takes the model up to the end of carbon burning * Part 6 (``inlist_convert``) This prepares the model for a PISN, by switching from cell-faced to cell-centered hydrodynamics, turning off rotation, and turning on the AMR mesh controls. * Part 7 (``inlist_finish``) This evoles the model through the PISN by taking it through carbon burning, explosive oxygen ignition, and stops once the star reaches a positive total energy. Last-Updated: 23Jun2021 (MESA 21a860) by rjfarmer