3D accretion disks: investigation of global transient dynamics

Details 3D accretion disks: investigation of global transient dynamics 3D accretion disks: investigation of global transient dynamics

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aps..aprx13003r&link_type=abstract

American Physical Society, APS April Meeting 2010, February 13-16, 2010, abstract #X13.003

Astronomy and Astrophysics

Astrophysics

Scientific paper

Accretion disks are both important and ubiquitous astrophysical objects. In this work we considered the approximate nonlinear dynamics of a disturbed hydrodynamical viscous thin disk with vertical structure. By means of an asymptotic expansion we find the temporal evolution of global non-axisymmetric perturbations. While in the first order all the variables decay, in the second order the perturbed density and vertical velocity display a strong transient growth. As these perturbations grow they wind and display successive radial peaks and troughs. We argue that these transient non-axisymmetric structures may be a critical element for a new alternative picture of development of turbulence in non-magnetized astrophysical disks. )

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