Other
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ess.....2.3301m&link_type=abstract
American Astronomical Society, ESS meeting #2, #33.01
Other
Scientific paper
About 50 planets have been detected in binary star systems. Among those, several binaries have a close separation of about 20 AU only. To study the conditions under which planets might form in such an environment, we investigate the evolution of a circumstellar disk in an eccentric binary star system. For that purpose we performed two-dimensional simulations for non-isothermal, radiative disks which are assumed to be coplanar with the binary. The disks are geometrically thin and are primarily governed by gas pressure and (turbulent) viscosity (described by the α model). We studied the influence of several physical parameters such as disk mass, α value and opacity on the evolution on the disk eccentricity, disk periastron and mass. For our standard model in the simulations we chose the γ Cephei system with a 0.01 solar mass disk. We find that the evolution of radiative disks differs significantly from the purely isothermal evolution. In particular, the magnitude of the disk's eccentricity is reduced.
Kley Willy
Müller W. A. T.
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