129 citations · 1.7k across the 78 of their papers we have counts for
12 papers · 1 filter
Effect of Electromagnetic Interaction on Galactic Center Flare Components
Arman Tursunov, Michal Zajaček, Andreas Eckart +5
Recently, near-infrared GRAVITY@ESO observations at have announced the detection of three bright "flares" in the vicinity of the Galactic center supermassive black…
Current and future applications of Reverberation-mapped quasars in Cosmology
Swayamtrupta Panda, Mary Loli Martínez-Aldama, Michal Zajaček
Reverberation mapping technique is an important milestone in AGN demographics, kinematics and the structure of the Broad Line Region (BLR) based on the time-delay response between…
The "Red Radio Ring": Ionised and Molecular Gas in a Starburst/Active Galactic Nucleus at
K. C. Harrington, A. Vishwas, A. Weiss +13
We report the detection of the far-infrared (FIR) fine-structure line of singly ionised nitrogen, \Nplusa, within the peak epoch of galaxy assembly, from a strongly lensed galaxy,…
Radio spectral index distribution of SDSS-FIRST sources across optical diagnostic diagrams
Michal Zajaček, Gerold Busch, Mónica Valencia-S. +7
A detailed understanding of how the activity of a galactic nucleus regulates the growth of its host is still missing. To understand the activity and the types of accretion of super…
A new bow-shock source with bipolar morphology in the vicinity of Sgr A*
F. Peißker, M. Zajacek, A. Eckart +3
Here we present a new bowshock blue-shifted source in the close vicinity of Sgr A* that we name X8. We use data-sets that are based on SINFONI observations with the Very Large Tele…
Can reverberation-measured quasars be used for cosmology?
Mary Loli Martínez-Aldama, Bożena Czerny, Damian Kawka +4
Quasars have been proposed as a new class of standard candles analogous to Supernovae, as their large redshift range and high luminosities make them excellent candidates. Reverbera…
Bow shock sources close to the Galactic centre
Michal Zajacek, Andreas Eckart, Seyedeh Elaheh Hosseini
We provide an up-to-date summary of the current observational and theoretical studies of stellar bow-shock sources close to the Galactic centre. The symmetry axis of a bow shock pr…
Time delay measurement of Mg II line in CTS C30.10 with SALT
Bozena Czerny, Aleksandra Olejak, Mateusz Ralowski +18
We report 6 yr monitoring of a distant bright quasar CTS C30.10 (z = 0.90052) with the Southern African Large Telescope (SALT). We measured the rest-frame time-lag of da…
Super-Massive Black Hole mass estimation from bright flares
Vladimir Karas, Michal Bursa, Michal Dovciak +4
Super-Massive Black Holes reside in galactic nuclei, where they exhibit episodic bright flares due to accretion events. Taking into account relativistic effects, namely, the boosti…
Polarimetry and strong gravity effects from spots orbiting near a black hole
Vladimir Karas, Michal Dovciak, Jiri Svoboda +4
We study the modulation of the observed radiation flux and the associated changes in the polarization degree and angle that are predicted by the orbiting spot model for flares from…
Near-infrared observations of star formation and gas flows in the NUGA galaxy NGC 1365
Nastaran Fazeli, Gerold Busch, Monica Valencia-S. +4
In the framework of understanding the gas and stellar kinematics and their relations to AGNs and galaxy evolution scenarios, we present spatially resolved distributions and kinemat…
Selected Chapters on Active Galactic Nuclei as Relativistic Systems
Vladimir Karas, Jiri Svoboda, Michal Zajacek
This volume presents an overview of selected aspects of physical processes occurring in the inner regions of Active Galactic Nuclei (AGN). The observational evidence suggests that…