Evidence for a 2:3 resonance in Sco X-1 kHz QPOs

2002/06/28 by M. A. Abramowicz, T. Bulik, Michal Bursa +3 · 4 citations
Earth and Planetary Sciences · Physics and Astronomy · #Astrophysical Phenomena and Observations #High-pressure geophysics and materials #Pulsars and Gravitational Waves Research #astro-ph

paper · pdf · doi:10.1051/0004-6361:20030737

published as Astron.Astrophys. 404 (2003) L21 · 4 pages, 3 figures

arxiv created 2002/06/28 · openalex publication_date 2003/05/26 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We find evidence that the two high frequency QPOs in Sco X-1 are, more often than not, approximately in the 2:3 frequency ratio familiar from studies of black hole candidates (e.g., XTE J1550-564, Remillard et al. [CITE]). This implies that the double kHz QPO phenomenon in neutron stars has its origin in properties of strong-field gravity and has little to do with the rotation of a stellar surface or any magnetic field structure anchored in the star.

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• On the kHz QPO frequency correlations in bright neutron star X-ray binaries
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• The MHD Alfven wave oscillation model of kHz Quasi Periodic Oscillations of Accreting X-ray binaries
• The distribution of kHz QPO frequencies in bright low mass X-ray binaries