947 citations · 3.4k across the 25 of their papers we have counts for
18 papers · 1 filter
Spectroscopic Detection of a Cusp of Late-type Stars around the Central Black Hole in the Milky Way
M. Habibi, S. Gillessen, O. Pfuhl +12
In a dynamically relaxed cluster around a massive black hole a dense stellar cusp of old stars is expected to form. Previous observations showed a relative paucity of red giant sta…
Detection of a drag force in G2's orbit: Measuring the density of the accretion flow onto Sgr A* at 1000 Schwarzschild radii
S. Gillessen, P. M. Plewa, F. Widmann +14
The Galactic Center black hole Sgr A* is the archetypical example of an underfed massive black hole. The extremely low accretion rate can be understood in radiatively inefficient a…
Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA*
GRAVITY Collaboration, R. Abuter, A. Amorim +57
We report the detection of continuous positional and polarization changes of the compact source SgrA* in high states ('flares') of its variable near- infrared emission with the nea…
Detection of the gravitational redshift in the orbit of the star S2 near the Galactic centre massive black hole
GRAVITY Collaboration, R. Abuter, A. Amorim +95
The highly elliptical, 16-year-period orbit of the star S2 around the massive black hole candidate Sgr A* is a sensitive probe of the gravitational field in the Galactic centre. Ne…
A Detection of Sgr A* in the far infrared
Sebastiano D. von Fellenberg, Stefan Gillessen, Javier Graciá-Carpio +14
We report the first detection of the Galactic Centre massive black hole, Sgr~A*, in the far infrared. Our measurements were obtained with PACS on board the \emph{Herschel} satellit…
The Galactic Centre source G2 was unlikely born in any of the known massive binaries
Diego Calderón, Jorge Cuadra, Marc Schartmann +4
The source G2 has already completed its pericentre passage around Sgr A*, the super-massive black hole in the centre of our Galaxy. Although it has been monitored for 15 years, its…
Unrecognized Astrometric Confusion in the Galactic Centre
P. M. Plewa, R. Sari
The Galactic Centre is a highly crowded stellar field and frequent unrecognized events of source confusion, which involve undetected faint stars, are expected to introduce astromet…
Ionized and molecular gas kinematics in a z=1.4 star-forming galaxy
Hannah D. N. Übler, Reinhard Genzel, Linda J. Tacconi +17
We present deep observations of a massive, star-forming galaxy in molecular and ionized gas at comparable spatial resolution (CO 3-2, NOEMA; H, LBT). The kinematic trace…
3D AMR hydrosimulations of a compact source scenario for the Galactic Centre cloud G2
A. Ballone, M. Schartmann, A. Burkert +8
The nature of the gaseous and dusty cloud G2 in the Galactic Centre is still under debate. We present three-dimensional hydrodynamical adaptive mesh refinement (AMR) simulations of…
Probing the Gas Density in our Galactic Center: Moving Mesh Simulations of G2
Elad Steinberg, Re'em Sari, Orly Gnat +11
The G2 object has recently passed its pericenter passage in our Galactic Center. While the emission shows clear signs of tidal interaction, the change in the observed lumino…
The Post-Pericenter Evolution of the Galactic Center Source G2
P. M. Plewa, S. Gillessen, O. Pfuhl +9
In early 2014 the fast-moving near-infrared source G2 reached its closest approach to the supermassive black hole Sgr A* in the Galactic Center. We report on the evolution of the i…
An Update on Monitoring Stellar Orbits in the Galactic Center
Stefan Gillessen, Philipp Plewa, Frank Eisenhauer +9
Using 25 years of data from uninterrupted monitoring of stellar orbits in the Galactic Center, we present an update of the main results from this unique data set: A measurement of…
The G2+G2t complex as a fast and massive outflow?
A. Ballone, M. Schartmann, A. Burkert +8
Observations of the gas component of the cloud G2 in the Galactic Center have revealed its connection to a tail (G2t) lying on the same orbit. More recent studies indicate a connec…
Testing General Relativity with the Shadow Size of Sgr A*
Tim Johannsen, Avery E. Broderick, Philipp M. Plewa +7
In general relativity, the angular radius of the shadow of a black hole is primarily determined by its mass-to-distance ratio and depends only weakly on its spin and inclination. I…
Pinpointing the near-infrared location of Sgr A* by correcting optical distortion in the NACO imager
P. M. Plewa, S. Gillessen, F. Eisenhauer +8
Near-infrared observations of stellar orbits at the Galactic Center provide conclusive evidence for a massive black hole associated with the compact radio source Sgr A*. The astrom…
3D adaptive mesh refinement simulations of the gas cloud G2 born within the disks of young stars in the Galactic Center
M. Schartmann, A. Ballone, A. Burkert +8
The dusty, ionized gas cloud G2 is currently passing the massive black hole in the Galactic Center at a distance of roughly 2400 Schwarzschild radii. We explore the possibility of…
The Galactic Center cloud G2 and its gas streamer
Oliver Pfuhl, Stefan Gillessen, Frank Eisenhauer +10
We present new, deep near-infrared SINFONI @ VLT integral field spectroscopy of the gas cloud G2 in the Galactic Center, from late summer 2013 and spring 2014. G2 is visible in rec…
Dynamics of gas and dust clouds in active galactic nuclei
P. M. Plewa, M. Schartmann, A. Burkert
We analyse the motion of single optically thick clouds in the potential of a central mass under the influence of an anisotropic radiation field ~|cos(θ)|, a model applicable to the…