Publication Abstracts

Carroll et al. 1985

Carroll, B.W., P.N. McDermott, M.P. Savedoff, H.M. van Horn, and W. Cabot, 1985: Accretion disk oscillations: A local analysis in a disk of finite thickness. Astrophys. J., 296, 529-539, doi:10.1086/163472.

Two types of oscillations are observed to occur in dwarf novae: "coherent" and "quasi-periodic" oscillations. These may be associated with the pulsation of the white dwarf or the accretion disk components of the dwarf nova. Here a local (short-wavelength) analysis is utilized to study the oscillation of a self-consistent, two-dimensional model of an accretion disk. The linearized equations describing adiabatic, inviscid, nonaxisymmetric oscillations are used to derive a fifth-order algebraic equation for the (complex) pulsation frequency of the disk. The solutions of this equation for various values of the wavevector k reveal that the disk is capable of supporting (1) a pair of high-frequency acoustic modes (p-modes); (2) a pair of intermediate-frequency modes which may share the characteristics of internal gravity waves (g-modes) and inertial waves; and (3) a mode associated with a dynamical instability (purely imaginary frequency). The role played by the shear in determining the stability or instability of these modes is also considered. Finally, we discuss the global oscillation frequencies of the disk.

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BibTeX Citation

  author={Carroll, B. W. and McDermott, P. N. and Savedoff, M. P. and van Horn, H. M. and Cabot, W.},
  title={Accretion disk oscillations: A local analysis in a disk of finite thickness},
  journal={Astrophysical Journal},

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RIS Citation

ID  - ca07710h
AU  - Carroll, B. W.
AU  - McDermott, P. N.
AU  - Savedoff, M. P.
AU  - van Horn, H. M.
AU  - Cabot, W.
PY  - 1985
TI  - Accretion disk oscillations: A local analysis in a disk of finite thickness
JA  - Astrophys. J.
JO  - Astrophysical Journal
VL  - 296
SP  - 529
EP  - 539
DO  - 10.1086/163472
ER  -

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