Non-linear resonance in the accretion disk of a millisecond pulsar

Wlodek Kluzniak, Marek A. Abramowicz, Shoji Kato +2

Twin quasi-periodic millisecond modulations of the X-ray flux (kHz QPOs) have recently been reported from an accreting 2.5 ms X-ray pulsar. We identify modes of disk oscillations w…