6 papers
Radiation pressure instability: from heart-beat states in black hole binary systems to Quasars and Changing-Look AGN
Agnieszka Janiuk, Bozena Czerny, Pulkit Ojha +2
Radiation-pressure instability was identified soon after the seminal classical accretion disk models of Shakura-Sunyaev and Novikov-Thorne, yet its full implications remain an acti…
The impact of disk outflows on the structure of short GRB jets at large scales
Gerardo Urrutia, Agnieszka Janiuk, Fatemeh Hossein Nouri
Short Gamma-Ray Bursts (GRBs) are known to be associated with binary neutron star (NSNS) or black hole-neutron star (BHNS) mergers. The detection of gravitational wave and its asso…
The X-ray Integral Field Unit at the end of the Athena reformulation phase
Philippe Peille, Didier Barret, Edoardo Cucchetti +279
The Athena mission entered a redefinition phase in July 2022, driven by the imperative to reduce the mission cost at completion for the European Space Agency below an acceptable ta…
Theoretical Modelling of Gamma-Ray Burst 090510
Joseph Saji, Agnieszka Janiuk, Maria Giovanna Dainotti +2
Gamma-ray bursts detected at high energies provide valuable insights into the emission mechanisms behind these still puzzling enigmatic events. In this study, we focus on GRB 09051…
Broad band spectral modeling of M87 nucleus
Andrzej Niedzwiecki, Michal Szanecki, Agnieszka Janiuk
We study spectra produced by weakly accreting black hole (BH) systems using the semi-analytic advection dominated accretion flow (ADAF) model and the general-relativistic magentohy…
Chaotic magnetic disconnections trigger flux eruptions in accretion flows channeled onto magnetically saturated Kerr black holes
Krzysztof Nalewajko, Mateusz Kapusta, Agnieszka Janiuk
Magnetized accretion flow onto a black hole (BH) may lead to accumulation of poloidal magnetic flux across its horizon, which for high BH spin can power far-reaching relativistic j…