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Restrictions to Neutron Star Properties Based on Twin-Peak Quasi-Periodic Oscillations

Published online by Cambridge University Press:  21 February 2013

Gabriel Török ,
Pavel Bakala ,
Eva Šrámková ,
Zdeněk Stuchlík ,
Martin Urbanec  and
Kateřina Goluchová
Gabriel Török
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: gabriel.torok@gmail.com
Pavel Bakala
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: gabriel.torok@gmail.com
Eva Šrámková
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: gabriel.torok@gmail.com
Zdeněk Stuchlík
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: gabriel.torok@gmail.com
Martin Urbanec
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: gabriel.torok@gmail.com
Kateřina Goluchová
Affiliation:
Institute of Physics, Faculty of Philosophy and Science, Silesian University in Opava, Bezručovo nám. 13, CZ-74601 Opava, Czech Republic email: gabriel.torok@gmail.com
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Abstract

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We consider twin-peak quasi-periodic oscillations (QPOs) observed in the accreting low-mass neutron star (NS) binaries and explore restrictions to NS properties that are implied by various QPO models. For each model and each source, the consideration results in a specific relation between the NS mass M and the angular-momentum j rather than in their single preferred combination. Furthermore, the inferred restrictions on NS properties (or QPO models) are weaker for the low-frequency sources than for the high-frequency sources.

Keywords

X-rays: binariesstars: neutronstars: fundamental parametersstars: rotation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S290: Feeding Compact Objects: Accretion on All Scales , August 2012 , pp. 319 - 320
Copyright
Copyright © International Astronomical Union 2013

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