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The Flare Activity of SgrA*; New Coordinated mm to X-Ray Observations
A. Eckart, F. K. Baganoff, R. Schoedel +17
We report new simultaneous near-infrared/sub-millimeter/X-ray observations of the SgrA* counterpart associated with the massive 3-4x10**6 solar mass black hole at the Galactic Cent…
Weighing the young stellar discs around Sgr A*
Sergei Nayakshin, Walter Dehnen, Jorge Cuadra +1
It is believed that young massive stars orbiting Sgr A* in two stellar discs on scales of 0.1-0.2 parsecs were formed either farther out in the Galaxy and then quickly migrated inw…
Variations in the spectral slope of Sgr A* during a NIR flare
S. Gillessen, F. Eisenhauer, E. Quataert +10
We have observed a bright flare of Sgr A* in the near infrared with the adaptive optics assisted integral field spectrometer SINFON. Within the uncertainties, the observed spectrum…
Dynamical properties of Ultraluminous Infrared Galaxies I: Mass ratio conditions for ULIRG activity in interacting pairs
K. M. Dasyra, L. J. Tacconi, R. I. Davies +6
We present first results from our Very Large Telescope large program to study the dynamical evolution of Ultraluminous Infrared Galaxies (ULIRGs), which are the products of mergers…
GCIRS34W: An irregular variable in the Galactic Centre
S. Trippe, F. Martins, T. Ott +7
We report the results of time-resolved photometric and spectroscopic near-infrared observations of the Ofpe/WN9 star and LBV candidate GCIRS34W in the Galactic Centre star cluster.…
Evolution of local Ultraluminous mergers from NIR spectroscopy
K. M. Dasyra, L. J. Tacconi, R. I. Davies +4
We present results from our VLT Large Program to study the dynamical evolution of Ultraluminous Infrared Galaxies (ULIRGs). We have so far obtained near-infrared high-resolution IS…
Probing Post-Newtonian Gravity near the Galactic Black Hole with Stellar Doppler Measurements
Shay Zucker, Tal Alexander, Stefan Gillessen +2
Stars closely approaching the massive black hole in the center of the Galaxy provide a unique opportunity to probe post-Newtonian physics in a yet unexplored regime of celestial me…
Millimeter observations of obscured Spitzer 24 micron sources
D. Lutz, L. Yan, L. Armus +4
We present MAMBO 1.2mm observations of 40 extragalactic sources from the Spitzer First Look Survey that are bright in the mid-infrared (S_24um>1mJy) but optically obscured (log_10…
GRAVITY: The AO-Assisted, Two-Object Beam-Combiner Instrument
F. Eisenhauer, G. Perrin, S. Rabien +6
We present the proposal for the infrared adaptive optics (AO) assisted, two-object, high-throughput, multiple-beam-combiner GRAVITY for the VLTI. This instrument will be optimized…
Near IR diffraction-limited integral-field SINFONI spectroscopy of the Circinus galaxy
F. Mueller Sanchez, R. I. Davies, F. Eisenhauer +2
Using the adaptive optics assisted near infrared integral field spectrometer SINFONI on the VLT, we have obtained observations of the Circinus galaxy on parsec scales. The morpholo…
Follow-Up Near-infrared Spectroscopy of Ultraluminous Infrared Galaxies observed by ISO
H. Dannerbauer, D. Rigopoulou, D. Lutz +3
We present low resolution near-infrared spectroscopy of an unbiased sample of 24 ultraluminous infrared galaxies (ULIRGs), selected from samples previously observed spectroscopical…
VLTI observations of IRS~3: The brightest compact MIR source at the Galactic Centre
J. -U. Pott, A. Eckart, A. Glindemann +7
The dust enshrouded star IRS~3 in the central light year of our galaxy was partially resolved in a recent VLTI experiment. The presented observation is the first step in investigat…
A Black Hole in the Galactic Center Complex IRS 13E?
R. Schoedel, A. Eckart, C. Iserlohe +2
The IRS 13E complex is an unusual concentration of massive, early-type stars at a projected distance of ~0.13 pc from the Milky Way's central supermassive black hole Sagittarius A*…
Mid-infrared spectroscopy of two luminous submillimeter galaxies at z~2.8
D. Lutz, E. Valiante, E. Sturm +5
Using the Infrared Spectrograph (IRS) on board the Spitzer Space Telescope, we have obtained rest frame mid-infrared spectroscopy of two bright submillimeter galaxies. SMMJ02399-01…
An interferometric CO survey of luminous submm galaxies
T. R. Greve, F. Bertoldi, Ian Smail +9
In this paper we present results from an IRAM Plateau de Bure millimetre-wave Interferometer (PdBI) survey for CO emission towards radio-detected submillimetre galaxies (SMGs) with…