Evidence for a 2:3 resonance in Sco X-1 kHz QPOs
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{Remillard}). 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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 2003
- DOI:
- 10.1051/0004-6361:20030737
- arXiv:
- arXiv:astro-ph/0206490
- Bibcode:
- 2003A&A...404L..21A
- Keywords:
-
- dense matter;
- general relativity;
- stars: neutron;
- stars: Sco X-1;
- X-rays: stars;
- Astrophysics
- E-Print:
- 4 pages, 3 figures