SIMBAD references

We examine by a perturbation method how the self-trapping of g-mode oscillations in geometrically thin relativistic discs is affected by uniform vertical magnetic fields. Discs that we consider are isothermal in the vertical direction, but are truncated at a certain height by presence of hot coronae. We find that the characteristics of self-trapping of axisymmetric g-mode oscillations in non-magnetized discs are kept unchanged in magnetized discs at least till a strength of the fields, depending on vertical thickness of discs. These magnetic fields become stronger as the disc becomes thinner. This result suggests that trapped g-mode oscillations still remain as one of the possible candidates of quasi-periodic oscillations observed in black hole and neutron-star X-ray binaries (Okazaki, Kato & Fukue; Nowak et al.) in the cases where vertical magnetic fields in discs are weak.