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@article{43302, author = {Šrámková, Eva}, article_location = {GB - Spojené království Velké Británie a}, article_number = {5}, keywords = {QUASI-PERIODIC OSCILLATIONS, INTEGRATED RELATIVISTIC TORI, THICK ACCRETION DISCS, AXISYMMETRICAL MODES, ANGULAR-MOMENTUM, SPACE-TIME, DISKS, DISKOSEISMOLOGY, EXCITATION, STABILITY}, language = {eng}, issn = {0264-9381}, journal = {Classical and Quantum Gravity}, title = {Epicyclic oscillations of non-slender fluid tori around Kerr black holes}, volume = {26}, year = {2009} }
TY - JOUR ID - 43302 AU - Šrámková, Eva PY - 2009 TI - Epicyclic oscillations of non-slender fluid tori around Kerr black holes JF - Classical and Quantum Gravity VL - 26 IS - 5 SN - 02649381 KW - QUASI-PERIODIC OSCILLATIONS, INTEGRATED RELATIVISTIC TORI, THICK ACCRETION DISCS, AXISYMMETRICAL MODES, ANGULAR-MOMENTUM, SPACE-TIME, DISKS, DISKOSEISMOLOGY, EXCITATION, STABILITY N2 - Considering epicyclic oscillations of pressure-supported perfect fluid tori orbiting Kerr black holes we examine non-geodesic (pressure) effects on the epicyclic modes properties. Using a perturbation method we derive fully general relativistic formulaefor eigenfunctions and eigenfrequencies of the radial and vertical epicyclic modes of a slightly non-slender, constant specific angular momentum torus up to second-order accuracy with respect to the torus thickness. The behaviour of the axisymmetric andlowest-order (m = +/- 1) non-axisymmetric epicyclic modes is investigated. For an arbitrary black hole spin we find that, in comparison with the (axisymmetric) epicyclic frequencies of free test particles, non-slender tori receive negative pressure corrections and thus exhibit lower frequencies. ER -
ŠRÁMKOVÁ, Eva. Epicyclic oscillations of non-slender fluid tori around Kerr black holes. \textit{Classical and Quantum Gravity}. GB - Spojené království Velké Británie a, 2009, vol.~26, No~5, 27 pp. ISSN~0264-9381.
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