Extended orbital resonance model with hump-induced oscillations
作者： Petr Slany , Zdenek Stuchlik , Gabriel Torok
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摘要: Change of sign the LNRF-velocity gradient has been found for accretion discs orbiting rapidly rotating Kerr black holes with spin a > 0.9953 Keplerian and 0.99979 marginally stable thick discs. Such "humpy" profiles occur just above circular geodesic could be related to oscillations The frequency such "hump"-induced can identified maximal rate change orbital velocity within profile. Therefore, we introduce an extended resonance model (EXORM) quasiperiodic (QPOs) assuming non-linear resonant phenomena between epicyclic frequencies humpy defined in fully general relativistic way. EXORM is developed both perfect-fluid tori where approximation acceptable. Clearly, applied near-extreme hole systems exhibiting relatively complex QPO patterns. Assuming disc, it shown that framework EXORM, all QPOs observed microquasar GRS 1915+105 explained, while not possible case Galactic Centre source Sgr A*.
harvard.edu
arxiv.org参考文章(42)
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