Disc-protoplanet interaction: Influence of circumprimary radiative discs on self-gravitating protoplanetary bodies in binary star systems

• Published in: Astronomy and astrophysics (Berlin) 2014-06, Vol.566, p.np-np
• Main Authors: Gyergyovits, M, Eggl, S, Pilat-Lohinger, E, Theis, Ch
• Format: Article
• Language: English
• Subjects: Binary stars; Binary systems; Discs; Disks; Drag; Dynamical systems; Planet formation; Plutonium
• ISSN: 0004-6361; 1432-0746
• DOI: 10.1051/0004-6361/201321854

More than 60 planets have been discovered so far in systems that harbour two stars, some of which have binary semimajor axes as small as 20 au. It is well known that the formation of planets in such systems is strongly influenced by the stellar components, since the protoplanetary disc and the particles within are exposed to the gravitational influence of the binary. However, the question on how self-gravitating protoplanetary bodies affect the evolution of a radiative, circumprimary disc is still open. We present our 2D hydrodynamical GPU-C PU code and study the interaction of several thousands of self-gravitating particles with a viscous and radiative circumprimary disc within a binary star system. Not only gas drag can alter the orbit of particles, but the gravitational influence of the disc can accomplish this as well. The results depend strongly on the state of the disc- according to encounter-probability distributions, planet formation can be strongly altered if there is a dynamically evolving gas disc - and also on the smoothing parameter.