On The Dynamics Of Dust Grains In A Hierarchical Environment

摘要: The star formation process usually leads to the of protoplanetary disks. Planets are thought arise from material these Amongst stars in solar neighbourhood, single systems like our own a minority. Most found binaries or even higher multiplicity. In this paper, we extend simulations presented Paper I (de la Fuente Marcos and de Marcos, 1998a) hierarchical triple systems. As I, study stage planetary during which particulate is still dispersed as centimetre-to-metre sized primordial aggregates. We investigate response particles, disk with radius RD = 100 AU around solar-like star, gravitational field bound perturbing companions moderately wide (300–1600 AU) orbit. for problem no analytic description orbital evolution particles exists, perform numerical integrations using Bulirsch–Stoer integrator. For purpose, have carried out series coplanar configurations three direct integration code that models viscous forces. massive one components system. time dust sub-disk depends mainly on nature (prograde retrograde) relative revolution stellar companions, temperature mass circumstellar disk. perturbation prograde induces trailing spiral structure across sub-metric sub-disk. Metre-sized affected by strong precession. Our results show lifetime system slightly shorter its valuein although actual value nature, retrograde, outer companion. including inner binary retrograde body longer than an equivalent all prograde. Dust disks both motion respect shortest lifetimes. previous calculations suggest luminosities several orders magnitude those stars. Circumstellar may be 5–50% more luminous depending direction rotation.