scholarly journals Discovery of correlated optical/X-ray quasi-periodic oscillations in black hole binary SWIFT J1753.5–0127

2015 ◽  
Vol 454 (3) ◽  
pp. 2855-2862 ◽  
Author(s):  
Alexandra Veledina ◽  
Mikhail G. Revnivtsev ◽  
Martin Durant ◽  
Poshak Gandhi ◽  
Juri Poutanen
Keyword(s):  
Black Hole ◽  
Periodic Oscillations ◽  
X Ray ◽  
Black Hole Binary

scholarly journals Properties of Faint X-ray Activity of XTE J1908+094 in 2019

Galaxies ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 25
Author(s):  
Debjit Chatterjee ◽  
Arghajit Jana ◽  
Kaushik Chatterjee ◽  
Riya Bhowmick ◽  
Sujoy Kumar Nath ◽  
...  
Keyword(s):  
Black Hole ◽  
Temporal Analysis ◽  
Power Density Spectrum ◽  
Periodic Oscillations ◽  
Telescope Array ◽  
Density Spectrum ◽  
X Ray ◽  
Black Hole Candidate ◽  
Short Period ◽  
Spectral State

We study the properties of the faint X-ray activity of Galactic transient black hole candidate XTE J1908+094 during its 2019 outburst. Here, we report the results of detailed spectral and temporal analysis during this outburst using observations from Nuclear Spectroscopic Telescope Array (NuSTAR). We have not observed any quasi-periodic-oscillations (QPOs) in the power density spectrum (PDS). The spectral study suggests that the source remained in the softer (more precisely, in the soft–intermediate) spectral state during this short period of X-ray activity. We notice a faint but broad Fe Kα emission line at around 6.5 keV. We also estimate the probable mass of the black hole to be 6.5−0.7+0.5M⊙, with 90% confidence.

scholarly journals Epicyclic oscillations in spinning particle motion around Kerr black hole applied in models fitting the quasi-periodic oscillations observed in microquasars and AGNs

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
Misbah Shahzadi ◽  
Martin Kološ ◽  
Zdeněk Stuchlík ◽  
Yousaf Habib
Keyword(s):  
Black Hole ◽  
Active Galactic Nuclei ◽  
High Frequency ◽  
Kerr Black Hole ◽  
Galactic Nuclei ◽  
Tidal Disruption ◽  
Periodic Oscillations ◽  
Spinning Particle ◽  
X Ray ◽  
Test Particles

AbstractThe study of the quasi-periodic oscillations (QPOs) of X-ray flux observed in the stellar-mass black hole (BH) binaries or quasars can provide a powerful tool for testing the phenomena occurring in strong gravity regime. We thus fit the data of QPOs observed in the well known microquasars as well as active galactic nuclei (AGNs) in the framework of the model of geodesic oscillations of Keplerian disks modified for the epicyclic oscillations of spinning test particles orbiting Kerr BHs. We show that the modified geodesic models of QPOs can explain the observational fixed data from the microquasars and AGNs but not for all sources. We perform a successful fitting of the high frequency QPOs models of epicyclic resonance and its variants, relativistic precession and its variants, tidal disruption, as well as warped disc models, and discuss the corresponding constraints of parameters of the model, which are the spin of the test particle, mass and rotation of the BH.

X-ray observations of the black hole binary V404 Cygni in quiescence

1994 ◽  
Author(s):  
R. M. Wagner ◽  
S. G. Starrfield ◽  
T. J. Kreidl ◽  
S. B. Howell ◽  
R. M. Hjellming
Keyword(s):  
Black Hole ◽  
X Ray ◽  
Black Hole Binary

Unusual Black Hole Binary LMC X-3: A Transient High-mass X-Ray Binary That Is Almost Always On?

2017 ◽  
Vol 849 (1) ◽  
pp. 32 ◽  
Author(s):  
Trevor J. Torpin ◽  
Patricia T. Boyd ◽  
Alan P. Smale ◽  
Lynne A. Valencic
Keyword(s):  
Black Hole ◽  
High Mass ◽  
X Ray ◽  
Black Hole Binary

scholarly journals High‐Frequency Quasi‐periodic Oscillations in the Black Hole X‐Ray Transient XTE J1650−500

2003 ◽  
Vol 586 (2) ◽  
pp. 1262-1267 ◽  
Author(s):  
Jeroen Homan ◽  
Marc Klein‐Wolt ◽  
Sabrina Rossi ◽  
Jon M. Miller ◽  
Rudy Wijnands ◽  
...  
Keyword(s):  
Black Hole ◽  
High Frequency ◽  
Periodic Oscillations ◽  
X Ray
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