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Resonant switch model of twin peak HF QPOs applied to the atoll source 4U 1636-53

Published online by Cambridge University Press:  21 February 2013

Zdeněk Stuchlík
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: [email protected], [email protected]
Andrea Kotrlová
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: [email protected], [email protected]
Gabriel Török
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: [email protected], [email protected]
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Abstract

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We present a Resonant Switch (RS) model of twin peak high-frequency quasi-periodic oscillations (HF QPOs), assuming switch of twin oscillations at a resonant point, where frequencies of the upper and lower oscillations νU and νL become to be commensurable and the twin oscillations change from one pair of the oscillating modes (corresponding to a specific model of HF QPOs) to some other pair due to non-linear resonant phenomena. The RS model enables to determine range of allowed values of spin a and mass M of the neutron star located at the atoll source 4U 1636-53 where two resonant points are observed at frequency ratios νU : νL = 3:2, 5:4.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013

References

Stuchlík, Z., Kotrlová, A., & Török, G. 2012, AcA (in press)Google Scholar
Török, G. 2009, A&A, 497, 661Google Scholar
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