Atlas of Numerically Simulated Cataclysmic Variable Accretion Disks that Retrogradely Precess

Details Atlas of Numerically Simulated Cataclysmic Variable Accretion Disks that Retrogradely Precess Atlas of Numerically Simulated Cataclysmic Variable Accretion Disks that Retrogradely Precess

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.2509m&link_type=abstract

American Astronomical Society, AAS Meeting #212, #25.09; Bulletin of the American Astronomical Society, Vol. 40, p.534

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a portion of our atlas on numerically simulated accretion disks of Cataclysmic Variable Dwarf Novae systems that undergo retrograde precession. This retrograde precession is artificially induced by tilting the disks out of the orbital plane about the primary. As a result of the tilting, the disk's line of nodes slowly precesses in the retrograde direction. The secondary, orbiting in the prograde direction, meets up with the line of nodes on a period that is a few percent shorter than the orbital period. These simulated nodal superhump periods are comparable with negative superhump periods obtained from observations. These comparable periods support the general consensus that observed negative superhumps in CVs are due to the retrograde precession of a tilted disk. In this work, we show artificial light curves and resulting Fourier transforms that are obtained from our smoothed particle hydrodynamic simulations of 100,000 particle disks. This work is a part of a long-term study on how and why accretion disks tilt naturally on their own, and thus we begin our long-term studies by artificially tilting non-apsidally precessing accretion disks to isolate the nodal superhump. This work is partially supported by a grant from the American Astronomical Society.

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