منابع مشابه
Twin - peak quasiperiodic oscillations as an internal resonance ( Research Note )
Aims. Two interrelated peaks occur in high-frequency power spectra of X-ray lightcurves of several black-hole candidates. We further explore the idea that a non-linear resonance mechanism, operating in strong-gravity regime, is responsible for these quasi-periodic oscillations (QPOs). Methods. By extending the multiple-scales analysis of Rebusco, we construct two-dimensional phase-space section...
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We present a numerical method for the investigation of quasiperiodic oscillations in applications modeled by systems of ordinary differential equations. We focus on systems with parts that have a significant rotational speed. An important element of our approach is that it allows us to verify whether one can neglect gravitational forces after a change of coordinates into a corotating frame. Spe...
متن کاملObservation of Kilohertz Quasiperiodic Oscillations from the Atoll Source 4U 1702−429 by RXTE
We present results of Rossi X-Ray Timing Explorer (RXTE) observations of the atoll source 4U 1702−429 in the middle of its luminosity range. Kilohertzrange quasiperiodic oscillations (QPOs) were observed first as a narrow (FWHM ∼7 Hz) peak near 900 Hz, and later as a pair consisting of a narrow peak in the range 625–825 Hz and a faint broad (FWHM 91 Hz) peak. When the two peaks appeared simulta...
متن کاملPlanar Quasiperiodic Ising Models
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Nanophotonic structures with irregular symmetry, such as quasiperiodic plasmonic crystals, have gained an increasing amount of attention, in particular as potential candidates to enhance the absorption of solar cells in an angular insensitive fashion. To examine the photonic bandstructure of such systems that determines their optical properties, it is necessary to measure and model normal and o...
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ژورنال
عنوان ژورنال: Scholarpedia
سال: 2007
ISSN: 1941-6016
DOI: 10.4249/scholarpedia.1783