Resonant radii of kHz quasi-periodic oscillations in Keplerian discs orbiting neutron stars

@article{42108,
   author = {Kotrlová, Andrea and Stuchlík, Zdeněk and Török, Gabriel},
   article_location = {FR - Francouzská republika},
   article_number = {0},
   doi = {http://dx.doi.org/10.1051/0004-6361/201015029},
   keywords = {accretion, accretion disks, stars: neutron, X-rays: binaries},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {Resonant radii of kHz quasi-periodic oscillations in Keplerian discs orbiting neutron stars},
   volume = {525},
   year = {2011}
}

TY  - JOUR
ID  - 42108
AU  - Kotrlová, Andrea - Stuchlík, Zdeněk - Török, Gabriel
PY  - 2011
TI  - Resonant radii of kHz quasi-periodic oscillations in Keplerian discs orbiting neutron stars
JF  - Astronomy & Astrophysics
VL  - 525
SP  - 1-5
EP  - 1-5
SN  - 00046361
KW  - accretion, accretion disks, stars: neutron, X-rays: binaries
N2  - Exchange of dominance between twin kHz quasi-periodic oscillations (QPOs) observed in some low-mass-X-ray-binaries (LMXBs) suggests the possibility of a resonance between two oscillatory modes. We study the behaviour of the effective gravitational potential around specific resonant radii, and estimate the role of the higher-order terms governing the non-linear, anharmonic forcing. We discuss the impact it has on the mode amplitude in the linear and non-linear regimes. We also discuss a related possibility of lowering of the neutron star mass estimates from the highest observed QPO frequencies.
ER  - 

KOTRLOVÁ, Andrea, Zdeněk STUCHLÍK and Gabriel TÖRÖK. Resonant radii of kHz quasi-periodic oscillations in Keplerian discs orbiting neutron stars. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2011, vol.~525, p.~1-5. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201015029.