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Orbital Motion in Strongly Curved Spacetime

Analyzing orbital motion in curved spacetime, comparing QPO models, and timing signatures of accretion discs inhomogeneities. Collaboration with renowned researchers. Findings on small spots and elongated spots in orbits close to ISCO using RXTE and LOFT data. Implications for understanding epicyclic motion.

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Orbital Motion in Strongly Curved Spacetime

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  1. Observing Orbital Motion in StronglyCurvedSpacetime Gabriel Török Institute ofPhysics, Silesian University in Opava CZ.1.07/2.3.00/20.0071Synergy , GAČR 209/12/P740, 202/09/0772,SGS-01-2013, www.physics.cz

  2. Observing Orbital Motion in StronglyCurvedSpacetime : Gabriel Török Institute ofPhysics, Silesian University in Opava CZ.1.07/2.3.00/20.0071Synergy , GAČR 209/12/P740, 202/09/0772,SGS-01-2010, www.physics.cz

  3. Timingsignaturesofaccretiondiscinhomogeneities Gabriel Török Institute ofPhysics, Silesian University in Opava CZ.1.07/2.3.00/20.0071Synergy , GAČR 209/12/P740, 202/09/0772,SGS-01-2013, www.physics.cz

  4. 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

  5. Comparing different orbital QPO models, RXTE and LOFT Response Matrices (Detector) Global Empirical Model of Variability and Spectra (GRS 1915+105, SPL State) TOTAL SOURCE FLUX MODEL + “DATA” Time and Spectral Distribution of Detected Counts RESULTS QPO MODEL TIMING ANALYSIS

  6. I. Small spots moving along slightly eccentric orbits close ISCO

  7. I. Small spots moving along slightly eccentric orbits close ISCO POWER POWER Left: RXTE Right: LOFT

  8. II. Toymodelsof double peakQPOsassumingpreferredorbits

  9. II. Toymodelsof double peakQPOsassumingpreferredorbits POWER Left: RXTE Right: LOFT

  10. III. Elongatedspotswith LOFT [LOFT YELLOW BOOK]

  11. CONCLUSIONS Ad SMALL SPOTS: The LOFT observationscouldeasily reveal the Keplerian frequency together with its firstand second harmonics when the strongest (but still veryweak) single signal is around the limits of the RXTE detectability. Ad ELONGATED SPOTS: The LOFT missioncould open a window to observetheepicyclicmotion. Ad SPOT vs. TORUS COMPARISON: We conclude that the abilityto recognize the harmonic content of the signal andfollowthe QPO evolutioncan help to distinguish between thedifferentproposedphysicalmodels.

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