Formation of long-period post-common-envelope binaries - II. Explaining the self-lensing binary KOI 3278

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Table 2.

Predicted and observed (Yahalomi et al. 2019) parameters of KOI 3278.

Parameter	Observed	Predicted
Orbital period (d)	88.1805	88.1805
WD mass (M_⊙)	$0 . 5250_{- 0.0089}^{+ 0.0082}$ $0.5250^{+0.0082}_{-0.0089}$	0.531
MS companion
Mass (M_⊙)	$0 . 911_{- 0.026}^{+ 0.023}$ $0.911^{+0.023}_{-0.026}$	0.910
Radius (R_⊙)	$0 . 861_{- 0.023}^{+ 0.028}$ $0.861^{+0.028}_{-0.023}$	0.861
T_eff (K)	$5384_{- 44}^{+ 45}$ $5384^{+45}_{-44}$	5385
log g (cm s⁻²)	$4 . 525_{- 0.035}^{+ 0.028}$ $4.525^{+0.028}_{-0.035}$	4.527
Age (Gyr)	$4 . 3_{- 2.6}^{+ 3.2}$ $4.3^{+3.2}_{-2.6}$	5.2
Metallicity	[Fe/H] = 0.118 ± 0.040	Z = 0.024

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