Evidence for a 2:3 resonance in Sco X-1 kHz QPOs
M. A. AbramowiczDepartment of Astrophysics, Chalmers University, 412-96 Göteborg, Sweden, e-mail: [email protected]T. BulikCopernicus Astronomical Centre, ul. Bartycka 18, 00-716 Warszawa, Poland, e-mail: [email protected]Michal BursaAstronomical Institute, Charles University Prague, V Holešovičkách 2 CZ-180 00 Praha 8, Czech Republic e-mail: [email protected]W. KluźniakCentre d'Étude Spatiale des Rayonnements, 9 Av. Colonel-Roche, 31028 Toulouse Cedex 4, France
2003en
ABI
Аннотация
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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