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Multi-planet disc interactions in binary systems
Alessia Franchini, Rebecca G. Martin, Stephen H. Lubow
We investigate the evolution of a multi--planet--disc system orbiting one component of a binary star system. The planet--disc system is initially coplanar but misaligned to the bin…
Orbital dynamics of circumbinary planets
Cheng Chen, Alessia Franchini, Stephen H. Lubow +1
We investigate the dynamics of a nonzero mass, circular orbit planet around an eccentric orbit binary for various values of the binary eccentricity, binary mass fraction, planet ma…
The frequency of Kozai-Lidov disc oscillation driven giant outbursts in Be/X-ray binaries
Rebecca G. Martin, Alessia Franchini
Giant outbursts of Be/X-ray binaries may occur when a Be-star disc undergoes strong eccentricity growth due to the Kozai-Lidov (KL) mechanism. The KL effect acts on a disc that is…
Type I outbursts in low eccentricity Be/X-ray binaries
Alessia Franchini, Rebecca G. Martin
Type I outbursts in Be/X-ray binaries are usually associated with the eccentricity of the binary orbit. The neutron star accretes gas from the outer parts of the decretion disk aro…
Circumbinary disk inner radius as a diagnostic for disk--binary misalignment
Alessia Franchini, Stephen H. Lubow, Rebecca G. Martin
We investigate the misalignment of the circumbinary disk around the binary HD 98800 BaBb with eccentricity . \cite{Kennedy2019} observed the disk to be either at an in…
Alignment of a circumbinary disc around an eccentric binary with application to KH 15D
Jeremy L. Smallwood, Stephen H. Lubow, Alessia Franchini +1
We analyse the evolution of a mildly inclined circumbinary disc that orbits an eccentric orbit binary by means of smoother particle hydrodynamic (SPH) simulations and linear theory…
Generalised warped disk equations
Rebecca G. Martin, Stephen H. Lubow, J. E. Pringle +6
The manner in which warps in accretion disks evolve depends on the magnitude of the viscosity. For small viscosity the warp evolves in a wave-like manner; for large visc…
Misaligned accretion disc formation via Kozai-Lidov oscillations
Alessia Franchini, Rebecca G. Martin, Stephen H. Lubow
We investigate the formation and evolution of misaligned accretion discs around the secondary component of a binary through mass transfer driven by Kozai-Lidov oscillations of the…