tests:collision:gc4:method_comp
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M4 mass modelling / method comparison results
1. Comparison between single component and 3-model(s)
Here we compare isotropic, single-component LIMEPY models to isotropic, 3-component LIMEPY models. Gunn & Griffin 1979 posed that the complexity of real GCs with various mass components, all with their own $M/L$, could be captured by 3-component models (1) (invisible) low-mass stars, (2) (visible) turn-off stars and (3) invisible remnants. We tried their Model A and also fit a model in which we derived the mass function from the snapshot.
Mass function:
| Model | M_j | M_j/M_tot | m_j | m_j/m_1 |
| 1B. GG79 Model A | [5.0, 1.0, 0.1] | [0.82, 0.16, 0.02] | [0.50, 1.0, 1.5] | |
| 1C. Actual MF | [3.1, 1.0, 3.0] | [0.43, 0.14, 0.42] | [0.37, 0.78, 0.674] | [0.47, 1, 0.86] |
Results:
| Model | Half-mass radius [pc] | Mass [Msun] |
| True | 3.21 | 64255.9 |
| 1A. Single | 1.87+0.21-0.16 | 53158+3394-3165 |
| 1B. GG79 | 3.48+0.38-0.41 | 89924+7957-7371 |
| 1C. Actual | 2.64+0.36-0.30 | 68006+3965-4217 |
1A. Single mass LIMEPY model
1B. 3-component model: Gunn & Griffin 1979 model A
1C. 3-component model: actual mass function
tests/collision/gc4/method_comp.1476362192.txt.gz · Last modified: 2022/10/24 12:28 (external edit)