TY - GEN
TI - Epicyclic oscillations of thick relativistic disks
T3 - RAGtime /17.-19./
AU - Horák, Jiří
AB - We study epicyclic oscillations of thick relativistic tori with constant specific angular momentum distribution using the finite element numerical method. We have compared frequencies of the axisymmetric and non-axisymmetric modes with the analytic formulae obtained by Straub and Šrámková (2009) and Fragile et al. (2016). We have found excellent agreement in the case of axisymmetric radial epicyclic modes. In the case of the axisymmetric vertical epicyclic modes and non-axisymmetric modes in general, the analytic approximation agrees with numerical results only for tori of moderate thicknesses. Our analysis also revealed an instability of the thick constant angular momentum tori with respect to the radial epicyclic oscillation.
SN - 2336-5668
SN - 9788075102577
UR - http://hdl.handle.net/11104/0280063
UR - http://www.nusl.cz/ntk/nusl-371463
A2 - Šrámková, E.
A2 - Török, G.
A2 - Goluchová, K.
A2 - Straub, O.
LA - eng
KW - accretion disks
KW - black hole physics
KW - oscillation
PY - 2017
PB - Astronomický ústav, Fričova 298, 251 65 Ondřejov, http://www.asu.cas.cz/
ER -