ABRAMOWICZ, Marek and Gabriel TÖRÖK. Internal resonance in non-linear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs. Astronomy & Astrophysics. FR - Francouzská republika, 2009, No 499, 6 pp. ISSN 1432-0746. Available from: https://dx.doi.org/10.1051/0004-6361/200810740.
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Basic information
Original name Internal resonance in non-linear disk oscillations and the amplitude evolution of neutron star kilohertz QPOs
Authors ABRAMOWICZ, Marek and Gabriel TÖRÖK.
Edition Astronomy & Astrophysics, FR - Francouzská republika, 2009, 1432-0746.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10308 Astronomy
Confidentiality degree is not subject to a state or trade secret
Organization unit Faculty of Philosophy and Science in Opava
Doi http://dx.doi.org/10.1051/0004-6361/200810740
UT WoS 000266730500018
Keywords in English X-rays:binaries ?Stars:neutron? Accretion, accretion disks
Tags FÚ, GA205-070052, MSM4781305903
Tags International impact
Links GA205/07/0052, research and development project. MSM4781305903, plan (intention).
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 7/12/2020 11:41.
Abstract
We explore some properties of twin kilohertz quasiperiodic oscillations (QPOs) in a simple toy-model consisting of two oscillation modes coupled by a general nonlinear force. We examine resonant effects by slowly varying the values of the tunable, and nearly commensurable, eigenfrequencies. The behavior of the actual oscillation frequencies and amplitudes during a slow transition through the 3:2 resonance is examined in detail and it is shown that both are significantly affected by the nonlinearities inthe governing equations. In particular, the amplitudes of oscillations reflect a resonant exchange of energy between the modes, as a result the initially weaker mode may become dominant after the transition.
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