Table 9.
Results of fitting three phoebe2 models for δ Ori Aa1+Aa2. LC from season 2016 and all RVs were used to constrain the models.
Parameter | Fixed T1 | Fixed T1, free l3 | σ | Unit |
---|---|---|---|---|
T0 | 0.8303 | 0.8277 | 0.0030 | HJD ( * ) |
T1 | 31000 | 31000 | 300 | K |
T2 | 22709 | 22778 | 300 | K |
R1 | 13.27 | 13.01 | 0.55 | R⊙ |
R2 | 3.70 | 3.66 | 0.35 | R⊙ |
i1 | 77.671 | 78.45 | 1.1 | ° |
SB | 1.0079 | 1.0236 | 0.0008 | 1 |
SR | 1.0084 | 1.0250 | 0.0009 | 1 |
m1 | 18.07 | 17.39 | 1.5 | M⊙ |
m2 | 8.47 | 8.26 | 0.4 | M⊙ |
e1 | 0.0825 | 0.0826 | 0.0031 | |
ω1 | 129.98 | 137.50 | 2.5 | ° |
![]() |
1.45f | 1.45f | 1.45f | ° yr−1 |
γ | 19.43 | 21.96 | 0.5 | km s−1 |
l3B | 0.26685 | 0.308 | 0.05 | |
l3R | 0.26685 | 0.316 | 0.05 | |
![]() |
604 | 490 | ||
![]() |
145 | 136 | ||
![]() |
113 | 113 | ||
![]() |
171 | 216 | ||
![]() |
70 | 72 |
Notes. We fixed or released effective temperature T1 of the primary and the third light l3. We prefer the model with fixed T1 and l3 (bold). The uncertainty σ is estimated the same for all models. The following numbers of data points were used: Ntotal = 321, NLCB = NLCR = 100, NRV1 = 71, and NRV2 = 50. T0 denotes the time of periastron passage (( * )means HJD−2457733); T1 and T2, the effective temperatures of the primary and secondary, respectively; R1 and R2, the radii of the primary and secondary, respectively; i, inclination; SB and SR, the coefficients adjusting normalisation of the flux defined in Eq. (4); m1 and m2, the masses of the primary and secondary, respectively; e1, eccentricity; ω1, the argument of periastron; γ, the systemic velocity; l3R and l3B, the third light in the blue and red filters, respectively; , the total value of χ2;
,
,
, and
, the contributions to χ2 from the LCs in the red and blue filters and radial velocities of the primary and secondary; Ntotal, the total number of data points; NLCB, NLCR, NRV1, and NRV2, the corresponding numbers of data points. Uncertainties were estimated from Figs. 11 and 13.
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