TÖRÖK, Gabriel. On the distribution of frequency ratios of kHz QPOs. Monthly Notices of the Royal Astronomical Society. GB - Spojené království Velké Británie a, 2010, vol. 401, No 2, 9 pp. ISSN 1365-2966.
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Basic information
Original name On the distribution of frequency ratios of kHz QPOs
Authors TÖRÖK, Gabriel.
Edition Monthly Notices of the Royal Astronomical Society, GB - Spojené království Velké Británie a, 2010, 1365-2966.
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
Keywords in English Accretion - Accretion disk, stars: neutron, stars: X-rays
Tags FÚ, MSM4781305903
Tags International impact
Links MSM4781305903, plan (intention).
Changed by Changed by: Mgr. Pavlína Jalůvková, učo 25213. Changed: 7/12/2020 11:51.
Abstract
The width (W), root mean squared amplitude (Rs) of lower and upper kHz quasi-periodic oscillations (QPOs) from accreting neutron stars vary with frequency. Similarly, the QPO frequency varies with the source count rate (S). Hence, the significance of a QPO, scaling as S x Rs^2/W^(1/2) will also depend on frequency. In addition, the significance also scales up with the square root of the integration time of the Fourier power density spectrum (T). Consequently, depending on the way data are considered, kHz QPOs may be detected only over a limited range of their frequency spans or detected predominantly at some frequencies, leading potentially to biases in the observed distributions of frequencies or frequency ratios.
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