5 papers
Tidal disruption of a low-mass star in an active galactic nucleus as the origin of the PS16dtm outburst
Marzena Åniegowska, Bożena Czerny, Michal ZajaÄek +7
The event PS16dtm, which occured in the center of the Narrow Line Seyfert 1 (NLS1) galaxy SDSS J015804.75-005221.8 (z = 0.080440), is one of the few candidates for a tidal disrupti…
Supernova interactions with aspherical circumstellar material I: calculations of light curves, AB magnitudes, spectra, and polarisation
Petr Kurfürst, Georgi Bless, Jakub Fišák +5
We present an upgraded detailed numerical calculations of supernova (SN) interactions with significantly aspherical circumstellar matter (CSM), primarily formed as a disc or bipola…
Red giant - jet collisions in galactic nuclei I: 3D hydrodynamical model of a few stellar orbits
Petr Kurfürst, Michal ZajaÄek, Norbert Werner +1
Several models have been proposed to explain missing red giants (RGs) near the Galactic centre. Recently, a scenario has been suggested that predicts, among other processes, a long…
Polarization of light from fast rotating Wolf-Rayet stars: A Monte Carlo simulations compared to analytical formula
Slah Abdellaoui, JiÅà KrtiÄka, Brankica Kubátová +1
Fast-rotating Wolf-Rayet (WR) stars are potential progenitors of long gamma-ray bursts, but observational verification is challenging. Spectral lines from their expanding stellar w…
Revealing EMRI/IMRI candidates with quasiperiodic ultrafast outflows
Michal ZajaÄek, Petra Suková, VladimÃr Karas +7
The first detection of the quasiperiodic ultrafast outflow in the ASASSN-20qc system was reported by Pasham et al. (2024). The outflow is revealed in the soft X-ray spectra as an a…