# On mass-constraints implied by the relativistic precession model of twin-peak quasi-periodic oscillations in Circinus X-1

```@article{Torok2010OnMI,
title={On mass-constraints implied by the relativistic precession model of twin-peak quasi-periodic oscillations in Circinus X-1},
author={Gabriel Torok and Pavel Bakala and Eva {\vS}r{\'a}mkov{\'a} and Zdeněk Stuchl{\'i}k and Martin Urbanec},
journal={arXiv: High Energy Astrophysical Phenomena},
year={2010}
}```
• G. Torok, +2 authors M. Urbanec
• Published 2010
• Physics
• arXiv: High Energy Astrophysical Phenomena
Boutloukos et al. (2006) discovered twin-peak quasi-periodic oscillations (QPOs) in 11 observations of the peculiar Z-source Circinus X-1. Among several other conjunctions the authors briefly discussed the related estimate of the compact object mass following from the geodesic relativistic precession model for kHz QPOs. Neglecting the neutron star rotation they reported the inferred mass M_0 = 2.2 +/- 0.3 M_\sun. We present a more detailed analysis of the estimate which involves the frame… Expand
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