meeting 2024 07 09 n57 - JacobPilawa/TriaxSchwarzschild_wiki_5 GitHub Wiki

Context

• We left off last time discussing the differences between the old models and new models. Specifically, it seemed like last time I was comparing two different chi2 values which does seem to be the case. As a reminder, here are the three cases:

  • Original Grid: Massive dataset of all of our old models. At the time, we had been scraping the chi2 a bit different so I don't have direct access to the full sets of kinematics and thus the kinematic chi2s computed from the kinematics themselves. Instead, the total chi2 that is stored here is the chisq stored in the nnls files.
  • New, bad bins: running ~1100 of the "original grid" models using the incorrect binning scheme and for which I have the entire suite of outputs.
  • New, good bins: running ~1100 of the "original grid" models using the correct binning scheme and for which I have the entire suite of outputs.

• I've got a few comparisons below hoping to elucidate how these three grids are related to one another.

• First, here's a comparison of the different chi2 NNLS values, all of which track each other quite well:

Original Grid NNLS vs. New, Bad Bin NNLS	Original Grid NNLS vs. New, Good Bin NNLS	New, Bad Bin NNLS vs. New, Good Bin NNLS
[images/240709/original_vs_new_bad_bins.png]]](/JacobPilawa/TriaxSchwarzschild_wiki_5/wiki/[[images/240709/original_vs_new_good_bins.png)	images/240709/new_bad_bins_vs_new_good_bins.png

• And here's a direct comparison of the NNLS chi2 vs the kinematic chi2 for the new models (good and bad binning respectively):

New, Bad Bins	New, Good Bins (ignore plot title)
[images/240709/new_bad_bins_kinem_nnls.png]]](/JacobPilawa/TriaxSchwarzschild_wiki_5/wiki/[[images/240709/new_good_bins_kinem_nnls.png)

• I made similar plots to what Emily had sent for these two cases, showing the trend - kinematic chi2 values. My residuals look quite similar to Emily's with the caveat that my dispersion is a fact of ~2 larger in the residuals, but the means are very well centered at 0.

New, Bad Bins	New, Good Bins
[images/240709/new_bad_residuals.png]]](/JacobPilawa/TriaxSchwarzschild_wiki_5/wiki/[[images/240709/new_good_residuals.png)

• And for completeness, here is a comparison of the original grid NNLS chi2 values versus the New, Bad and New, Good kinem chi2 values:

Original NNLS vs. New, Bad Kinem	Original NNLS vs. New, Good Kinem
[images/240709/original_nnls_vs_new_bad_kinem.png]]](/JacobPilawa/TriaxSchwarzschild_wiki_5/wiki/[[images/240709/original_nnls_vs_new_good_kinem.png)