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    On magnetic-field induced non-geodesic corrections to the relativistic precession QPO model

    Zdeněk Stuchlík · 01 září, 2008 · Fyzika · 0 comments
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    Publication date: Sep 2008

    Abstract:
    Fitting the observational data of the twin peak kHz quasiperiodic oscillations (QPO) from low mass X-ray binaries (LMXBs) by the relativistic precession model gives a substantially higher neutron star mass estimate, M~2 Msolar, than the „canonical value“, M~1.4 Msolar. Using a fully general relativistic approach we discuss the non-geodesic corrections to the orbital and epicyclic frequencies of slightly charged circularly orbiting test particles caused by the presence of a neutron star magnetic field. We show that consideration of such non-geodesic corrections can bring down the neutron star mass estimate and improve the quality of twin peak QPO data fits based on relativistic precession frequency relations.

    Authors:
    Bakala, Pavel; Šrámková, Eva; Stuchlík, Zdeněk; Török, Gabriel;

    https://ui.adsabs.harvard.edu/abs/2008AIPC.1054..123B

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