2008/07/28 by Hannah Jang‐Condell, H. Jang-Condell, M. Mugrauer +2
Physics and Astronomy · #Accretion (finance) #Accretion disc #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Debris disk #Limiting #Physics #Planet #Planetary migration #Planetary system #Protoplanetary disk #Stellar, planetary, and galactic studies #Truncation (statistics) #astro-ph
paper · pdf · doi:10.1086/591791
4 pages, 4 color figures. To appear in ApJL
arxiv created 2008/07/28 · openalex publication_date 2008/07/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The γ Cephei system is one of the most closely bound binary planet hosts known to date. The companion (γ Cep B) to the planet-hosting star (γ Cep A) should have truncated any protoplanetary disk around γ Cep A, possibly limiting planet formation in the disk. We explore this problem by calculating the truncation radii of protoplanetary disk models around γ Cep A to determine whether or not there is sufficient material remaining in the disk to form a planet. We vary the accretion rate and viscosity parameter of the disk models to cover a range of reasonable possibilities for the disk properties and determine that for accretion rates of ≥10 −7 M ☉ yr −1 and low viscosity parameter, sufficient material in gas and solids exist for planet formation via core accretion to be possible. Disk instability is less favored, as this can only occur in the most massive disk model with an extremely high accretion rate.