Changes between Version 19 and Version 20 of u/erica/CoreCollapseBlog
- Timestamp:
- 03/15/18 19:43:48 (7 years ago)
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u/erica/CoreCollapseBlog
v19 v20 14 14 '''Figure 2.''' A comparison of the interpolated pressure profile from the HSE self gravity module in Astrobear (blue) to the supplied progenitor pressure profile (red). 15 15 16 Note, Astrobear’s output doesn't line up exactly with the input progenitor profiles towards the center of the core. I suspect this has to do with interpolation -- for instance, the average density calculated for the cell centers should be resolution dependant (to maintain a constant enclosed mass irrespective of resolution), which would move the density profiles away from each other in Fig. 1. 16 Note, Astrobear’s output doesn't line up exactly with the input progenitor profiles towards the center of the core. I suspect this has to do with interpolation -- for instance, the average density calculated for the cell centers should be resolution dependant (to maintain a constant enclosed mass irrespective of resolution), which would move the density profiles away from each other in Fig. 1. The steeper the gradient, the greater this deviation for a given resolution. This effect would translate to the pressure profile, given the HSE pressure profile is computed from the interpolated density profile. 17 17 18 18 Figures 3 & 4 are zoom-ins of the density and pressure profiles between the innermost zone (located at dx=5.6e+7 cm) and the radius at which the profiles begin to noticeably deviate. Note the progenitor profile has data sampling down to radius of r=7.84e+5 cm, so about 2 orders of magnitude finer resolution than in this example simulation.