| 06.12.2016 | ||
|
Petra Sukova (Prague, Czechia) | ||
| Structure of low angular momentum accretion flows on black holes | ||
| STRESZCZENIE I will present recent results of the studies of low angular momentum accretion of matter onto Schwarzschild black hole using fully relativistic numerical simulations. I will compare the resulting 2D structure and behaviour of transonic flows with 1D pseudo-Newtonian computations of non-magnetized flow. The research has observable consequences on black holes on the whole mass scale, in particular it is related to the time-scale and shape of luminosity flares in Sgr A* or to the evolution of QPO frequency during outbursts of microquasars. | ||
| O PRELEGENCIE I did my Bc., Mgr. And PhD. Thesis under the supervision of doc. Oldrich Semerak with the title „Chaos in motion around black holes“. During this period I was studying the onset of chaotic behaviour of geodesic test particles with the growing strength of the perturbation of the initially Schwarzschild black hole, which was caused by the presence of massive disc or ring. After defending my PhD thesis I was employed for three years as a postdoctoral fellow in the astrophysical group of Agnieszka Janiuk at the Center for Theoretical physics of the Polish Academy of Sciences. There we have studied the properties of low angular momentum flow around black holes and we also have investigated the possible traces of non-linear behaviour of microquasars using the recurrence analysis on their X-ray light curves. Currently I am employed at the Astronomical Institute of the Czech Academy of Sciences, where I am continuing my research about accretion flows onto black holes and their numerical simulations in the cooperation with Vladimir Karas and also the research on the astrophysical impacts of chaotic motion around black holes surrounded by additional matter with Ondrej Kopacek and Georgios Lukes-Gerakopoulos. | ||