Changes between Version 28 and Version 29 of u/erica/CoreCollapseBlog

Timestamp:

03/15/18 20:09:16 (7 years ago)

Author:

Erica Kaminski

Comment:

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u/erica/CoreCollapseBlog

@@ -26 +26 @@
 In addition to the given input progenitor profile (red curve) and the lineout from the simulation (blue curve), I’ve plotted two additional profiles in these figures (accidentally their colors are swapped in the different plots). The first is the initial profile 'object' (populated with the progenitor input values). This is just the input progenitor values after they have been read into a readable format for astrobear’s HSE solver (i.e. a “profile object”). 
 
-The second is the profile object after it has been sent through the HSE solver. Note, although it can’t be seen here, the initial and final ''density'' profile objects are exactly identical and they perfectly line up with the progenitor density profile, but the initial and final ''pressure'' profiles are marginally different (~<1%) near the center of the core, with the initial pressure profile curve being identical to the progenitor pressure profile. This is because the HSE solver calculates what the pressure profile should be in HSE, given the input density profile. Since the input and output pressure profiles deviate slightly indicates that the initial progenitor profile wasn’t exactly in HSE (to within numerical uncertainty). Again, the larger deviation of the blue curve is due to interpolation onto the coarser grid of this simulation.
+The second is the profile object after it has been sent through the HSE solver. Note, although it can’t be seen here, the initial and final ''density'' profile objects are exactly identical and they perfectly line up with the progenitor density profile, but the initial and final ''pressure'' profiles are marginally different (~<1%) near the center of the core, with the initial pressure profile curve being identical to the progenitor pressure profile. This is because the HSE solver calculates what the pressure profile should be in HSE, given the input density profile (and external pressure). Since the input and output pressure profiles deviate slightly indicates that the initial progenitor profile wasn’t exactly in HSE (to within numerical uncertainty). Again, the larger deviation of the blue curves is due to interpolation onto the coarser grid of this simulation.
 
 When we are talking overall differences of ~$10^8$ in the density profile, perhaps this relatively small discrepancy shouldn’t be worried about too much… Although, it is curious. I am going to run a simulation with a finer resolution to compare to these results here.