Volume 525, January 2011
|Number of page(s)||5|
|Section||Stellar structure and evolution|
|Published online||02 December 2010|
Resonant radii of kHz quasi-periodic oscillations in Keplerian discs orbiting neutron stars
Institute of Physics, Faculty of Philosophy and Science, Silesian
University in Opava,
Bezručovo nám. 13,
e-mail: email@example.com; firstname.lastname@example.org, email@example.com
Accepted: 12 September 2010
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.
Key words: accretion, accretion disks / stars: neutron / X-rays: binaries
© ESO, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.