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Table 4
Joint-fit system parameters for XO-2b.
| Parameter | Value |
|
|
|
| period, P† [days] | 2.61586178 ± 0.00000075 |
| mid-transit time, T(0)† [HJD] | 2454466.88457 ± 0.00014 |
| radius reference, Rref = Rpl/R⋆ | 0.10362 ± 0.00070 |
| altitude, Z(λ = 6792) | 0.00146 ± 0.00075 |
| Z(λ = 7582) | 0.00278 ± 0.00077 |
| Z(λ = 7664) | 0.00322 ± 0.00079 |
| Z(λ = 8839) | 0 (fixed) |
| inclination, i [deg] | 87.62 ± 0.51 |
| system scale, a/R⋆ | 7.83 ± 0.17 |
| impact parameter, b = acosi/R⋆ | 0.324 ± 0.070 |
| stellar density, ρ⋆ [g cm-3] | 1.328 ± 0.088 |
| linear limb-darkening coeff., c2 | fixed to Table 2 values |
| T(261) [HJD] | 2 455 149.62450 ± 0.00027 |
| T(269) [HJD] | 2 455 170.55140 ± 0.00023 |
| T(269) [HJD] | 2 455 170.55181 ± 0.00023 |
| T(303) [HJD] | 2455259.48978 ± 0.00030 |
|
|
|
| Using best-fit values (i, a/R⋆, b, & ρ⋆) | |
| Rpl/R⋆(λ) = R(6792 Å) | 0.10508 ± 0.00052 |
| R(7582 Å) | 0.10640 ± 0.00058 |
| R(7664 Å) | 0.10686 ± 0.00060 |
| R(8839 Å) | 0.10362 ± 0.00051 |
|
|
|
| Previously determined model-dependent parameters | |
| R⋆ [R⊙] | 0.976 ± 0.020‡ |
| Rpl [RJup] | 0.996 ± 0.025‡ |
| M⋆ [M⊙] | 0.971 ± 0.034‡ |
| Mpl [MJup] | 0.565 ± 0.054‡ |
Notes.
(†)
Fit with the data from Burke et al. (2007) and Fernandez et al. (2009).
(‡)
From Fernandez et al. (2009).
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