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Vznik tohoto materiálu byl podpořen z projektu SYNERGY „Podpora zapojení do mezinárodních sítí teoretického a observačního výzkumu v oblasti relativistické astrofyziky kompaktních
objektů” CZ.1.07/2.3.00/20.0071, který je spolufinancován Evropským sociálním fondem a
Státním rozpočtem ČR.
Slezsk
Observing Orbital Motion in Strongly Curved Spacetime
Gabriel Török
Institute of Physics, Silesian University in Opava
CZ.1.07/2.3.00/20.0071 Synergy , GAČR 209/12/P740, 202/09/0772, SGS-01-2013, www.physics.cz
Observing Orbital Motion in Strongly Curved Spacetime :
Gabriel Török
Institute of Physics, Silesian University in Opava
CZ.1.07/2.3.00/20.0071 Synergy , GAČR 209/12/P740, 202/09/0772, SGS-01-2010, www.physics.cz
Timing signatures of accretion disc inhomogeneities
Gabriel Török
Institute of Physics, Silesian University in Opava
CZ.1.07/2.3.00/20.0071 Synergy , GAČR 209/12/P740, 202/09/0772, SGS-01-2013, www.physics.cz
COLLABORATION:
Pavel Bakala, Didier Barret, Vladimír Karas, Michal Dovčiak, Martin Wildner,
Dalibor Wzientek, Marek Abramowicz, Luigi Stella, Eva Šrámková, Kateřina
Goluchová, Frederic Vincent, Grzegorz Mazur, Tomáš Pecháček
TOTAL SOURCE FLUX MODEL
Comparing different orbital QPO models, RXTE and LOFT
Global Empirical
Model of Variability
and Spectra (GRS
1915+105, SPL State)
+
Response Matrices
(Detector)
“DATA” Time and
Spectral Distribution
of Detected Counts
QPO MODEL
TIMING
ANALYSIS
RESULTS
I. Small spots moving along slightly eccentric orbits close ISCO
Left: RXTE
POWER
POWER
I. Small spots moving along slightly eccentric orbits close ISCO
Right: LOFT
II. Toy models of double peak QPOs assuming preferred orbits
POWER
II. Toy models of double peak QPOs assuming preferred orbits
Left: RXTE
Right: LOFT
[LOFT YELLOW BOOK]
III. Elongated spots with LOFT
CONCLUSIONS
Ad SMALL SPOTS:
The LOFT observations could easily reveal the Keplerian frequency
together with its first and second harmonics when the strongest
(but still very weak) single signal is around the limits of the RXTE
detectability.
Ad ELONGATED SPOTS:
The LOFT mission could open a window to observe the epicyclic
motion.
Ad SPOT vs. TORUS COMPARISON:
We conclude that the ability to recognize the harmonic content of
the signal and follow the QPO evolution can help to distinguish
between the different proposed physical models.