Table 5
Final estimates for the geometric and orbital parameters of KELT-1b and its host star.
| Ephemeris | |||
|---|---|---|---|
| Transit epoch | T0 | (BJD) | 2455914.1624 ± 4 × 10−4 |
| Orbital period | P | (days) | 1.2174942 ± 2 × 10−7 |
| Transit duration | T14 | (h) | 2.74 ± 0.01 |
| Relative properties | |||
| Area ratio | k2 | (A*) | 0.00585 ± 7 × 10−5 |
| Radius ratio | k | (R*) | 0.0765 ± 5 × 10−4 |
| Semi-major axis | a | (R*) | 3.53 ± 0.09 |
| Impact parameter | b | (R*) | 0.35 (−0.08) (+0.06) |
| Absolute properties | |||
| KELT-1b radius | Rc | (RJup) | 1.138 ± 0.010 |
| KELT-1b surface gravity | log gc | (cgs) | 4.73 ± 0.02 |
| KELT-1b eq. temperature(a) | Teq | (K) | 2550 ± 170 |
| Semi-major axis | a | (AU) | 0.0251 ± 0.0006 |
| Orbital inclination | i | (deg) | 84.3 (−1.1) (+1.4) |
| Stellar density | ρ* | (g cm−3) | 0.56 ± 0.04 |
| TESS emission offset | OT | (deg) | 3 ± 9 |
| Spitzer 3.6 µm emission offset | OS1 | (deg) | −29 ± 5 |
| Spitzer 4.5 µm emission offset | OS2 | (deg) | 4 ± 6 |
Notes. The estimates correspond to the posterior median with the uncertainties based on the 16th and 84th posterior percentiles. (a)The equilibrium temperature is calculated using the stellar Teff estimate, scaled semi-major axis distribution, heat redistribution factor distributed uniformly between 0.25 and 0.5, and albedo distributed uniformly between 0 and 0.4.
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