Disks in close binary stars - γ-Cephei revisited | Astronomy & Astrophysics (A&A)

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Table 1

Physical and numerical parameters for initializing the standard model.

Primary star mass	1.4 M_⊙
Secondary star mass	0.4 M_⊙
Semi-major axis	20 au
Eccentricity	0.4
Orbital period	66.7 a

Disk mass	0.01 M_⊙
α viscosity	10⁻³
Adiabatic index	7∕5

Initial density profile	∝ r⁻¹
Initial temperature profile	∝ r⁻¹

R_min − R_max	0.2–12 au
Grid (N_r × N_φ)	760 × 1162

Notes. Since there is no gravitational feedback from the disk onto the stars, the binary orbital parameters do not change during the simulation. The disk mass of 10⁻² M_⊙ equates to Σ(1 au) = 2570 g cm⁻².

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