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A note on the slope-shift anticorrelation in the neutron star kHz QPOs data

Conference paper
Authors Marek A Abramowicz
D. Barret
M. Bursa
J Horak
W. Kluzniak
P. Rebusco
G. Torok
Published in n Proceedings of RAGtime 6/7: Workshops on black holes and neutron stars
ISBN ISBN 80-7248-334-X
Publication year 2005
Published at Department of Physics (GU)
Language en
Links adsabs.harvard.edu/abs/2005ragt.mee...
Keywords QPOs, Neutron stars, X-ray variability
Subject categories Physical Sciences

Abstract

Observations show that the upper νU and lower νL of the ``twin peak'' high frequency QPOs in neutron star sources vary along lines νU = AνL + B in a frequency-frequency plot, and that their ratios νU/νL cluster near the value 3/2. This behaviour is well consistent with the predictions of the non-linear resonance model for QPOs. In this Note, we further explore our recent finding that the coefficients A, B of the frequency-frequency lines for individual sources are anticorrelated. In the (A,B) plane, they occupy rather a narrow region along the line A = 3/2 - B/600 Hz. We show that this observational property of QPOs also follows from the resonance model

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