On the role of $\Lambda$ on accretion disks
  The dynamics of accretion disk is considered taking into account the
Lense-Thirring precession in the presence of cosmological constant $\Lambda$ of
Schwarzschild-de Sitter. The nodal and apsidal frequencies are obtained, and
the role of $\Lambda$ is revealed in their properties, including the
consequences for the Bardeen-Petterson effect.
