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Observations of the gas cloud G2 in the Galactic Center
Stefan Gillessen, Reinhard Genzel, Tobias K. Fritz +6
In 2011, we discovered a compact gas cloud ("G2") with roughly three Earth masses that is falling on a near-radial orbit toward the massive black hole in the Galactic Center. The o…
The Nuclear Cluster of the Milky Way: Total Mass and Luminosity
Tobias K. Fritz, Sotiris Chatzopoulos, Ortwin Gerhard +6
Here we present the fundamental properties of the nuclear cluster of the Milky Way. First, we derive its structural properties by constructing a density map of the central 1000'' u…
Massive binaries in the vicinity of Sgr A*
O. Pfuhl, T. Alexander, S. Gillessen +5
A long-term spectroscopic and photometric survey of the most luminous and massive stars in the vicinity of the super-massive black hole Sgr A* revealed two new binaries; a long-per…
Pericenter passage of the gas cloud G2 in the Galactic Center
Stefan Gillessen, Reinhard Genzel, Tobias K Fritz +6
We have further followed the evolution of the orbital and physical properties of G2, the object currently falling toward the massive black hole in the Galactic Center on a near-rad…
Hydrodynamical simulations of a compact source scenario for the Galactic Center cloud G2
A. Ballone, M. Schartmann, A. Burkert +6
The origin of the dense gas cloud G2 discovered in the Galactic Center (Gillessen et al. 2012) is still a debated puzzle. G2 might be a diffuse cloud or the result of an outflow fr…
On the origin of the B-stars in the Galactic center
Ann-Marie Madigan, Oliver Pfuhl, Yuri Levin +3
We present a new directly-observable statistic which uses sky position and proper motion of stars near the Galactic center massive black hole to identify populations with high orbi…
Simulations of the origin and fate of the Galactic Center cloud G2
M. Schartmann, A. Burkert, Ch. Alig +5
We investigate the origin and fate of the recently discovered gas cloud G2 close to the Galactic Center. Our hydrodynamical simulations focussing on the dynamical evolution of the…
Flares and variability from Sagittarius A*: five nights of simultaneous multi-wavelength observations
X. Haubois, K. Dodds-Eden, A. Weiss +8
Aims. We report on simultaneous observations and modeling of mid-infrared (MIR), near-infrared (NIR), and submillimeter (submm) emission of the source Sgr A* associated with the su…