34 citations · 188 across the 11 of their papers we have counts for
11 papers
Binary Dynamics and Mergers in a Stellar Disk and the Formation of Dusty Objects in the Galactic Center
Myank Singhal, Ladislav Šubr, Jaroslav Haas +2
For more than a decade, observers have been tracking a population of enigmatic dusty objects orbiting the central supermassive black hole of the Milky Way, Sagittarius A (S…
Closing the gap: Follow-up observations of peculiar dusty objects close to Sgr A* using ERIS
F. Peißker, M. Zajacek, V. Karas +8
Context. In addition to the supermassive black hole Sgr A*, the inner parsec of our Galactic center is home to numerous fruitful scientific habitats. One of these environments is t…
Red giant - jet collisions in galactic nuclei I: 3D hydrodynamical model of a few stellar orbits
Petr Kurfürst, Michal Zajaček, 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…
The JWST Galactic Center Survey -- A White Paper
Rainer Schoedel, Steve Longmore, Jonny Henshaw +111
The inner hundred parsecs of the Milky Way hosts the nearest supermassive black hole, largest reservoir of dense gas, greatest stellar density, hundreds of massive main and post ma…
Quasar UV/X-ray relation luminosity distances are shorter than reverberation-measured radius-luminosity relation luminosity distances
Narayan Khadka, Michal Zajaček, Raj Prince +5
We use measurements of 59/58 quasars (QSOs), over a redshift range , to do a comparative study of the radius--luminosity () and X-rayUV luminosity…
Accretion disks, quasars and cosmology: meandering towards understanding
Bozena Czerny, Shulei Cao, Vikram Kumar Jaiswal +11
As Setti & Woltjer noted back in 1973, quasars could be used to construct the Hubble diagram but the actual application was not that straightforward. It took years to implement the…
Standardizing reverberation-measured C IV time-lag quasars, and using them with standardized Mg II quasars to constrain cosmological parameters
Shulei Cao, Michal Zajaček, Swayamtrupta Panda +3
We use 38 C IV quasar (QSO) reverberation-mapped (RM) observations, which span eight orders of magnitude in luminosity and the redshift range , to simul…
Consistency study of high- and low-accreting Mg ii quasars: No significant effect of the Fe ii to Mg ii flux ratio on the radius-luminosity relation dispersion
Narayan Khadka, Michal Zajaček, Swayamtrupta Panda +2
We use observations of 66 reverberation-measured \Mgii\ quasars (QSOs) in the redshift range -- a subset of the 78 QSOs we previously studied that also hav…
A ring accelerator? Unusual jet dynamics in the IceCube candidate PKS 1502+106
Silke Britzen, Michal Zajaček, Luka Č. Popović +8
On 2019/07/30.86853 UT, IceCube detected a high-energy astrophysical neutrino candidate. The Flat Spectrum Radio Quasar PKS 1502+106 is located within the 50 percent uncertainty re…
Monitoring dusty sources in the vicinity of Sgr A*
F. Peißker, S. E. Hosseini, M. Zajacek +5
We trace several dusty infrared sources on their orbit around the supermassive black hole (SMBH) SgrA* in the center of our galaxy. We give an overview of known and unknown sources…
Plunging neutron stars as origin of organised magnetic field in galactic nuclei
V. Karas, O. Kopacek, D. Kunneriath +4
Black holes cannot support their own internal magnetic field like, for example, compact stars can. Despite this fact observations indicate that event horizons of supermassive black…