208 citations · 1.3k across the 62 of their papers we have counts for
8 papers · 1 filter
Polarized light from Sgr A* in the near-infrared -band
B. Shahzamanian, A. Eckart, M. Valencia-S. +13
We present a statistical analysis of polarized near-infrared (NIR) light from Sgr A*, the radio source associated with the supermassive black hole at the center of the Milky Way. T…
Monitoring the Dusty S-Cluster Object (DSO/G2) on its Orbit towards the Galactic Center Black Hole
M. Valencia-S., A. Eckart, M. Zajacek +23
We analyse and report in detail new near-infrared (1.45 - 2.45 microns) observations of the Dusty S-cluster Object (DSO/G2) during its approach to the black hole at the center of t…
Conditions for the Thermal Instability in the Galactic Centre Mini-spiral region
A. Różańska, B. Czerny, D. Kunneriath +3
We explore the conditions for the thermal instability to operate in the mini-spiral region of the Galactic centre (Sgr A*), where both the hot and cold media are known to coexist.…
Tidal disruption events from a nuclear star cluster as possible origin of transient relativistic spectral lines near SMBH
V. Karas, M. Dovciak, D. Kunneriath +2
We discuss a possibility that a tidal disruption event near a dormant supermassive black hole (SMBH) can give rise to spectral features of iron in 6-7 keV X-ray signal: a relativis…
Probing the Galactic center with X-ray polarimetry
F. Marin, V. Karas, D. Kunneriath +2
The Galactic center (GC) holds the closest-to-Earth supermassive black hole (SMBH), which makes it the best laboratory to study the close environment of extremely massive compact o…
Oblique magnetic fields and the role of frame dragging near rotating black hole
V. Karas, O. Kopacek, D. Kunneriath +1
Magnetic null points can develop near the ergosphere boundary of a rotating black hole by the combined effects of strong gravitational field and the frame-dragging mechanism. The i…