Testing eccentricity pumping mechanisms to model eccentric long-period sdB binaries with MESA

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Volume 579 (July 2015)

A&A, 579 (2015) A49

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Table 2

Standard parameters of the binary models.

Parameter	Symbol	Value

sdB progenitor mass (M_⊙)	M _d	1.2
companion mass (M_⊙)	M _a	1.0
period (d)	P	700
eccentricity	e	0.3
minimum eccentricity	/	0.001
Tidal forces
dissipation type sdB	/	Convective
dissipation type companion	/	Radiative
Mass loss
maximum Ṁ (M_⊙ yr^-1)	/	10^-2
fraction lost around companion	α	0.35
fraction lost around donor	β	0.35
fraction lost through L2	δ	0.30
location of L2	γ	1.12
accreted fraction^a	ϵ	0
CB disk
maximum mass (M_⊙)	M _disk	0.01
life time (yr)	τ	10⁵
viscosity	α _D	0.01
mass distribution	σ(r)	r ^-1

Notes. For the models focusing only on phase-dependent RLOF, the disk mass is set to 0. The symbol column refers to the symbols used in the figures.

^(a)

The accreted fraction is defined by the other mass loss fractions as: ϵ = 1 − α − β − δ.

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