title: Formation of distant jupiters and its relation to disk structure

authors: Shigeru Ida

abstract: The formation of distant jupiters by scattering in the framework 
of core accretion model is discussed.  We have found through population synthesis 
calculation that in a few percent of planetary systems around solar type stars, 
gas giants in distant (> 30AU) nearly circular (e < 0.1) orbits are formed.  
Cores are scattered by a giant planet to distant regions and the cores undergo 
runaway gas accretion in the distant regions.  Through accretion of local gas 
and gravitational interactions with disk gas, the eccentricities of the distant 
giants are damped.  So, the distribution of distant giants is regulated by disk 
structure.   This model links the ongoing direct imaging observations of exoplanets 
with the coming disk observations by ALMA.