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Yuji Matsumoto et al 2015 ApJ 810 106

N-body simulations show that the eccentricities of planets that result from protoplanet mergers are much smaller than escape eccentricity due to very efficient collision damping.

Eugene Vasiliev et al 2015 ApJ 810 49

Simulations show that without collisional relaxation, axisymmetric galaxies still exhibit the final-parsec problem, but in tri-axial galaxies the binary can coalesce in <1 Gyr.

Chen-Xu Liu et al 2015 ApJ 810 165

This study of ~76k void galaxies shows that void galaxies are slightly fainter, are less massive, have younger stellar populations, and have higher specific star formation rates than wall galaxies.

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