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--- tests:collision:gc4:method_comp [2016/10/13 16:16] – watkins
+++ tests:collision:gc4:method_comp [2022/10/24 12:28] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 ==== M4 mass modelling / method comparison results ====
@@ Line 53: / Line 54: @@
   - I actually fit beta'=beta/(2-beta). This has the appealing property of being symmetric about 0 and finite in extent. beta'=0 is isotropy, beta'=1 is purely radial orbits and beta'=-1 is purely tangential. I only allow beta to vary between 1 and -50 to prevent extremely tangential orbits as this can cause my code to crash.
+==== Line-of-sight velocities only ====
+=== Model 1: constant M/L ===
+Extra assumptions:
+  - distance is known
+  - model is isotropic
+  - M/L is constant
+Fit for constant M/L only: 1 free parameter.
+{{:tests:collision:gc4:rv_ml_fit_mass.png?200|}} {{:tests:collision:gc4:rv_ml_fit_ml.png?200|}} {{:tests:collision:gc4:rv_ml_fit_rv_disp.png?200|}}
+=== Model 2: constant M/L, constant anisotropy, distance ===
+Extra assumptions:
+  - anisotropy is constant
+  - M/L is constant
+Fit for constant M/L, constant anisotropy, distance: 3 free parameters.
+{{:tests:collision:gc4:rv_mlad_fit_mass.png?200|}} {{:tests:collision:gc4:rv_mlad_fit_ml.png?200|}} {{:tests:collision:gc4:rv_mlad_fit_rv_disp.png?200|}}
+=== Model 3: variable M/L ===
+Extra assumptions:
+  - distance is known
+  - model is isotropic
+Fit for M/L per Gaussian component of SB MGE: 8 MGE components --> 8 parameters.
+{{:tests:collision:gc4:rv_mlvary_fit_mass.png?200|}} {{:tests:collision:gc4:rv_mlvary_fit_ml.png?200|}} {{:tests:collision:gc4:rv_mlvary_fit_rv_disp.png?200|}}
+==== Line-of-sight velocities and Proper motions ====
+=== Model 1: constant M/L, constant anisotropy, distance ===
+Extra assumptions:
+  - anisotropy is constant
+  - M/L is constant
+Fit for constant M/L, constant anisotropy, distance: 3 free parameters.
+{{:tests:collision:gc4:all_mlad_fit_mass.png?200|}} {{:tests:collision:gc4:all_mlad_fit_ml.png?200|}}
+{{:tests:collision:gc4:all_mlad_fit_pmr_disp.png?200|}} {{:tests:collision:gc4:all_mlad_fit_pmt_disp.png?200|}} {{:tests:collision:gc4:all_mlad_fit_rv_disp.png?200|}}
+=== Model 2: M/L, anisotropy, distance ===
+Fit for variable M/L (8 components), variable anisotropy (8 components), distance: 17 free parameters.
+{{:tests:collision:gc4:all_mlavaryd_fit_mass.png?200|}} {{:tests:collision:gc4:all_mlavaryd_fit_ml.png?200|}}
+{{:tests:collision:gc4:all_mlavaryd_fit_pmr_disp.png?200|}} {{:tests:collision:gc4:all_mlavaryd_fit_pmt_disp.png?200|}} {{:tests:collision:gc4:all_mlavaryd_fit_rv_disp.png?200|}}