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Simulations of flux variability of oscillating accretion fluid tori around Kerr black holes
Pavel Bakala, Kateřina Goluchová, Eva Šrámková +4
High frequency quasi-periodic oscillations (HF QPOs) are observed in the X-ray power-density spectra (PDS) of several microquasars and low mass X-ray binaries. Many proposed QPO mo…
Study of the X-ray activity of Sgr A* during the 2011 XMM-Newton campaign
Enmanuelle Mossoux, Nicolas Grosso, Frédéric H. Vincent +1
In Spring 2011 we observed Sgr A*, the supermassive black hole at the center of our Galaxy, with XMM-Newton with a total exposure of ~226 ks in coordination with the 1.3 mm VLBI. W…
Cosmic background radiation in the vicinity of a Schwarzschild black hole: no classic firewall
Maciek Wielgus, George F. R. Ellis, Frederic H. Vincent +1
The Cosmic Blackbody Background Radiation pervades the entire Universe, and so falls into every astrophysical black hole. The blueshift of the infalling photons, measured by a stat…
A magnetized torus for modeling Sgr A* millimeter images and spectra
F. H. Vincent, W. Yan, O. Straub +2
Context. The supermassive black hole, Sagittarius (Sgr) A*, in the centre of our Galaxy has the largest angular size in the sky among all astrophysical black holes. Its shadow, ass…
Distinguishing an ejected blob from alternative flare models at the Galactic centre with GRAVITY
F. H. Vincent, T. Paumard, G. Perrin +5
The black hole at the Galactic centre exhibits regularly flares of radiation, the origin of which is still not understood. In this article, we study the ability of the near-future…
Spectral signature of oscillating slender tori surrounding Kerr black holes
F. H. Vincent, G. P. Mazur, O. Straub +4
Context. Some microquasars exhibit millisecond quasi-periodic oscillations (QPO) that are likely related to phenomena occuring in the immediate vicinity of the central black hole.…