Table 9
NGC 4636 Jeans modelling best-fit NFW profiles, Burkert halos and logarithmic potentials.
| NFW dark halo | Burkert halo | Log. potential | ||||||||||||
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| ID | Sample | β | rs | ϱs | Mvir | Rvir | cvir | χ2 | r0 | ϱ0 | χ2 | r0 | v0 | χ2 |
| [kpc] | [M⊙ pc-3] | [1012 M⊙] | [kpc] | [kpc] | [M⊙ pc-3] | [kpc] | [km s-1] | |||||||
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) | (11) | (12) | (13) | (14) | (15) |
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| B.tan | Blue final | − 0.5 | 7 | 1.01 × 10-1 | 1.2 | 271 | 38.7 | < 0.1 | 6 | 1.33 × 10-1 | < 0.1 | 1 ⋆ | 219 | 0.15 |
| B.iso | Blue final | 0 | 18 | 1.47 × 10-2 | 2.2 | 333 | 18.5 | < 0.1 | 11 | 4.04 × 10-2 | < 0.1 | 4 | 234 | < 0.10 |
| B.rad | Blue final | + 0.5 | 59 | 2.07 × 10-3 | 7.2 | 497 | 8.4 | 0.1 | 22 | 1.39 × 10-2 | < 0.1 | 21 | 292 | < 0.10 |
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| R.tan | Red final | − 0.5 | 100 ⋆ | 5.71 × 10-4 | 6.7 | 485 | 4.9 | 8.9 | 100 ⋆ | 1.94 × 10-3 | 5.4 | 100 ⋆ | 528 | 5.2 |
| R.iso | Red final | 0 | 100 ⋆ | 6.59 × 10-4 | 8.1 | 516 | 5.2 | 10.9 | 100 ⋆ | 2.13 × 10-3 | 6.5 | 100 ⋆ | 560 | 6.2 |
| R.rad | Red final | + 0.5 | 100 ⋆ | 8.78 × 10-4 | 11.8 | 586 | 5.9 | 14.4 | 100 ⋆ | 2.81 × 10-3 | 8.4 | 100 ⋆ | 640 | 8.0 |
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| S.iso | Stars (BSG94) | 0 | 100 ⋆ | 9.219 × 10-4 | 12.6 | 598 | 6.0 | 2.2 | 100 ⋆ | 1.90 × 10-2 | 1.9 | 100 ⋆ | 1725 | 1.9 |
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| Joint solutions for blue GCs and Stars: | ||||||||||||||
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| S.B.tan | Blue GCs (β = −0.5), Stars (β = 0) | 100 ⋆ | 9.66 × 10-4 | 13.4 | 610 | 6.1 | 2.2 | 8 | 6.95 × 10-2 | 2.1 | 7 | 222 | 2.3 | |
| S.B.iso | Blue GCs (β = 0), Stars (β = 0) | 100 ⋆ | 8.78 × 10-4 | 11.8 | 586 | 5.9 | 2.2 | 10 | 4.89 × 10-2 | 2.1 | 8 | 237 | 2.2 | |
| S.B.rad | Blue GCs (β = + 0.5), Stars (β = 0) | 100 ⋆ | 9.22 × 10-4 | 12.6 | 599 | 6.0 | 2.3 | 13 | 3.71 × 10-2 | 2.4 | 10 | 270 | 2.4 | |
Notes. In all models, the R-band stellar mass-to light ratio is Υ ⋆ ,R = 5.8. Column (1) labels the models. The second column specifies the dispersion profile to which the Jeans models are fit. Column (3) gives the anisotropy parameter β. Columns (4) − (8) list the NFW (Eq. (13)) and virial parameters (see text for details). Column (9) gives the χ2 value. The parameters for the Burkert (1995) halos (15), i.e. r0, ϱ0 and the χ2 value of the best fit model are given in Cols. (10) − (12). Columns (13) − (15) are the values for the logarithmic potential (Eq. (16)). Asterisks indicate that the corresponding value is located at the edge of the model grid.
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