J
2014
Power density spectra of modes of orbital motion in strongly curved space-time: obtaining the observable signal
ABRAMOWICZ, Marek, Pavel BAKALA, Kateřina GOLUCHOVÁ, Eva ŠRÁMKOVÁ, Gabriel TÖRÖK et. al.
Základní údaje
Originální název
Power density spectra of modes of orbital motion in strongly curved space-time: obtaining the observable signal
Autoři
ABRAMOWICZ, Marek, Pavel BAKALA,
Kateřina GOLUCHOVÁ,
Eva ŠRÁMKOVÁ,
Gabriel TÖRÖK, Martin WILDNER, Dalibor WZIENTEK, Michal DOVČIAK, Vladimír KARAS, Grzegorz MAZUR a Frédéric H. VINCENT
Vydání
Monthly Notices of the Royal Astronomical Society, GB - Spojené království Velké Británie a, 2014, 0035-8711
Další údaje
Typ výsledku
Článek v odborném periodiku
Utajení
není předmětem státního či obchodního tajemství
Organizační jednotka
Filozoficko-přírodovědecká fakulta v Opavě
Klíčová slova anglicky
accretion, accretion discs; black hole physics; gravitation; methods: numerical; X-rays: binaries
Příznaky
Mezinárodní význam, Recenzováno
Návaznosti
EE2.3.20.0071, projekt VaV. GPP209/12/P740, projekt VaV.
V originále
High-frequency quasi-periodic oscillations (HF QPOs) appear in the X-ray variability of several accreting low-mass binaries. In a series of works, it was suggested that these QPOs may have connection to inhomogeneities orbiting close to an inner edge ofthe accretion disc. In this paper, we explore the appearance of an observable signal generated by small radiating circular hotspots moving along quasi-elliptic trajectories close to the innermost stable circular orbit in the Schwarzschild space?time. Ourconsideration takes into account the capabilities of observatories that have been operating in the past two decades represented by the Rossi X-ray Timing Explorer (RXTE) and the proposed future instruments represented by the Large Observatory for X-rayTiming (LOFT). For these purposes, we choose such model parameters that lead to light curves comparable to those observed in Galactic black hole sources, in particular the microquasar GRS 1915+105. We find that when a weak signal correspo
Zobrazeno: 25. 12. 2024 10:09