author={Oliver Pfuhl and Stefan Gillessen and Frank Eisenhauer and Reinhard Genzel and Philipp M. Plewa and T. Ott and Alessandro Ballone and M Schartmann and Andreas Burkert and Tobias K. Fritz and Re’em Sari and Elad Steinberg and Ann-Marie Madigan},
  journal={The Astrophysical Journal},
We present new, deep near-infrared SINFONI @ VLT integral field spectroscopy of the gas cloud G2 in the Galactic Center, from late 2013 August, 2014 April, and 2014 July. G2 is visible in recombination line emission. The spatially resolved kinematic data track the ongoing tidal disruption. The cloud reached minimum distance to the MBH of 1950 Schwarzschild radii. As expected for an observation near the pericenter passage, roughly half of the gas in 2014 is found at the redshifted, pre… Expand
The Post-pericenter Evolution of the Galactic Center Source G2
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 ionized gaseousExpand
Infrared-excess Source DSO/G2 Near the Galactic Center: Theory vs. Observations
Based on the monitoring of the Dusty S-cluster Object (DSO/G2) during its closest approach to the Galactic Center supermassive black hole in 2014 and 2015 with ESO VLT/SINFONI, we further explore theExpand
G2 and Sgr A*: A Cosmic Fizzle At The Galactic Center
We carry out a series of simulations of G2-type clouds interacting with the black hole at the galactic center, to determine why no large changes in the luminosity of Sgr A* were seen, and toExpand
Using gas clouds to probe the accretion flow around Sgr A*: G2's delayed pericentre passage
We study the dynamical evolution of the putative gas clouds G1 and G2 recently discovered in the Galactic center. Following earlier studies suggesting that these two clouds are part of a larger gasExpand
Detection of Galactic Center source G2 at 3.8 μm during periapse passage
We report new observations of the Galactic Center source G2 from the W. M. Keck Observatory. G2 is a dusty red object associated with gas that shows tidal interactions as it nears closest approachExpand
A population of dust-enshrouded objects orbiting the Galactic black hole
Observations of four additional G objects, all lying within 0.04 parsecs of the black hole and forming a class that is probably unique to this environment are reported. Expand
Probing the gas density in our Galactic Centre: moving mesh simulations of G2
The G2 object has recently passed its pericenter passage in our Galactic Center. While the $Br_\gamma$ emission shows clear signs of tidal interaction, the change in the observed luminosity is onlyExpand
No asymmetric outflows from Sagittarius A* during the pericenter passage of the gas cloud G2
The gas cloud G2 falling toward Sagittarius A* (Sgr A*), the supermassive black hole at the center of the Milky Way, is supposed to provide valuable information on the physics of accretion flows andExpand
Going with the flow: using gas clouds to probe the accretion flow feeding Sgr A*
The massive black hole in our galactic center, Sgr A*, accretes only a small fraction of the gas available at its Bondi radius. The physical processes determining this accretion rate remain unknown,Expand
Clump formation through colliding stellar winds in the Galactic Centre
The gas cloud G2 is currently being tidally disrupted by the Galactic Centre supermassive black hole, Sgr A*. The region around the black hole is populated by similar to 30 Wolf-Rayet stars, whichExpand


New Observations of the Gas Cloud G2 in the Galactic Center
We present new observations of the recently discovered gas cloud G2 currently falling toward the massive black hole in the Galactic Center. The new data confirm that G2 is on a highly ellipticalExpand
Pericenter passage of the gas cloud G2 in the galactic center
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-radial orbit. New,Expand
Physics of the Galactic Center Cloud G2, on Its Way toward the Supermassive Black Hole
We investigate the origin, structure, and evolution of the small gas cloud G2, which is on an orbit almost straight into the Galactic central supermassive black hole (SMBH). G2 is a sensitive probeExpand
A gas cloud on its way towards the supermassive black hole at the Galactic Centre
The presence of a dense gas cloud approximately three times the mass of Earth that is falling into the accretion zone of Sagittarius A*, a compact radio source at the Galactic Centre, is reported. Expand
Simulations of the origin and fate of the galactic center cloud G2
We investigate the origin and fate of the recently discovered gas cloud G2 close to the Galactic center. Our hydrodynamical simulations focusing on the dynamical evolution of the cloud in combinationExpand
A nova origin of the gas cloud at the Galactic center
The recent discovery by Gillessen and collaborators of a cloud of gas falling towards the Galactic Center on a highly eccentric orbit, diving nearly straight into the immediate neighborhood of theExpand
We present new observations and analysis of G2—the intriguing red emission-line object which is quickly approaching the Galaxy's central black hole. The observations were obtained with the laserExpand
Hydrodynamical simulations of a compact source scenario for the galactic center cloud G2
The origin of the dense gas cloud G2 discovered in the Galactic Center is still a debated puzzle. G2 might be a diffuse cloud or the result of an outflow from an invisible star embedded in it. WeExpand
A Stellar Wind Origin for the G2 Cloud: Three-Dimensional Numerical Simulations
We present 3D, adaptive mesh refinement simulations of G2, a cloud of gas moving in a highly eccentric orbit towards the galactic center. We assume that G2 originates from a stellar wind interactingExpand
The Galactic Center Weather Forecast
In accretion-based models for Sgr A*, the X-ray, infrared, and millimeter emission arise in a hot, geometrically thick accretion flow close to the black hole. The spectrum and size of the sourceExpand