Application of the relativistic precession model to the accreting milisecond X-ray pulsar IGR J17511-3057

The observation of a pair of simultaneous twin kHz QPOs in the power density spectrum of a neutron star or a black hole allows its mass‐angular‐momentum relation to be constrained. Situations in which the observed simultaneous pairs are more than one allow the different models of the kHz QPOs to be...

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Bibliographic Details
Published in:Astronomische Nachrichten 2016-03, Vol.337 (3), p.246-253
Main Author: Stefanov, I. Zh
Format: Article
Language:English
Subjects:
Accretion
Astrophysics
Constraints
Estimates
Mathematical models
Neutron stars
Precession
Pulsars
pulsars: general
stars: individual (IGR J17511−3057)
stars: neutron
X-rays
X-rays: binaries
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Summary:The observation of a pair of simultaneous twin kHz QPOs in the power density spectrum of a neutron star or a black hole allows its mass‐angular‐momentum relation to be constrained. Situations in which the observed simultaneous pairs are more than one allow the different models of the kHz QPOs to be falsified. Discrepancy between the estimates coming from the different pairs would call the used model into question. In the current paper, the relativistic precession model is applied to the twin kHz QPOs that appear in the light curves of three groups of observations of the accreting millisecond X‐ray pulsar IGR J17511–3057. It was found that the predictions of one of the groups are practically in conflict with the other two. Another interesting result is that the region in which the kHz QPOs have been born is rather broad and extends quite far from the ISCO. (© 2016 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.201512297