The orbit of the star S2 around SgrA* from VLT and Keck data (2009)
Gillessen, S., Eisenhauer, F., Fritz, T. K., Bartko, H., Dodds-Eden, K., Pfuhl, O., ...
Two recent papers (Ghez et al. 2008, Gillessen et al. 2009) have estimated the mass of and the distance to the massive black hole in the center of the Milky Way using stellar orbits. The two...
Is diffusion anomalous in two-dimensional Yukawa liquids? (2009)
There have recently been many predictions of "superdiffusion" in two-dimensional strongly coupled Yukawa systems, both by computer simulations and in dusty plasma experiments, with substantially...
An Extremely Top-Heavy IMF in the Galactic Center Stellar Disks (2009)
Bartko, H., Martins, F., Trippe, S., Fritz, T. K., Genzel, R., Ott, T., ...
We present new observations of the nuclear star cluster in the central parsec of the Galaxy with the adaptive optics assisted, integral field spectrograph SINFONI on the ESO/VLT. Our work allows the...
Ott, T., Bonitz, M., Hartmann, P.
An analysis of superdiffusion in two-dimensional strongly correlated Yukawa liquids is presented. In particular, we report a regular, montonic behavior of the diffusion exponent on the screening...
Dodds-Eden, K., Porquet, D., Trap, G., Quataert, E., Haubois, X., Gillessen, S., ...
This paper reports measurements of Sgr A* made with NACO in L' -band (3.80 um), Ks-band (2.12 um) and H-band (1.66 um) and with VISIR in N-band (11.88 um) at the ESO VLT, as well as with XMM-Newton...
Monitoring stellar orbits around the massive black hole in the galactic center (2009)
Gillessen, S., Eisenhauer, F., Trippe, S., Alexander, T., Genzel, R., Martins, F., ...
Evidence for warped disks of young stars in the galactic center (2009)
Bartko, H., Martins, F., Fritz, T. K., Genzel, R., Levin, Y., Perets, H. B., ...
Loopy belief propagation: Benefits and pitfalls on Ising-like systems (2008)
Abstract—Belief propagation (BeP) is a candidate for the accelerated evaluation of statistical averages if compared to Monte-Carlo approaches. For binary systems on infinite grids or with periodic...
Evidence for Warped Disks of Young Stars in the Galactic Center (2008)
Bartko, H., Martins, F., Fritz, T. K., Genzel, R., Levin, Y., Perets, H. B., ...
The central parsec around the super-massive black hole in the Galactic Center hosts more than 100 young and massive stars. Outside the central cusp (R~1") the majority of these O and Wolf-Rayet (WR)...
Genzel, R., Burkert, A., Bouché, N., Cresci, G., Förster Schriber, N. M., Shapley, A., ...
We present Hα integral field spectroscopy of well-resolved, UV/optically selected z ~ 2 star-forming galaxies as part of the SINS survey with SINFONI on the ESO VLT. Our laser guide star adaptive...
Monitoring stellar orbits around the Massive Black Hole in the Galactic Center (2008)
Gillessen, S., Eisenhauer, F., Trippe, S., Alexander, T., Genzel, R., Martins, F., ...
We present the results of 16 years of monitoring stellar orbits around the massive black hole in center of the Milky Way using high resolution NIR techniques. This work refines our previous analysis...
Kinematics of the old stellar population at the Galactic Center (2008)
Trippe, S., Gillessen, S., Gerhard, O. E., Bartko, H., Fritz, T. K., Maness, H. L., ...
We aim at a detailed description of the kinematic properties of the old, (several Gyrs) late-type CO-absorption star population among the Galactic centre (GC) cluster stars. We applied AO-assisted,...
Multiplicity of young stars in and around R Corona Australis (2008)
Köhler, R., Neuhäuser, R., Krämer, S., Leinert, Ch., Ott, T., Eckart, A.
The R CrA star-forming region has a small dark cloud with quite a number of protostars, T Tauri stars, and some Herbig Ae/Be stars, plus a number of weak-line T Tauri stars around the cloud found by...
Genzel, R., Burkert, A., Bouche, N., Cresci, G., Schreiber, N. M. Foerster, Shapley, A., ...
We present Ha integral field spectroscopy of well resolved, UV/optically selected z~2 star-forming galaxies as part of the SINS survey with SINFONI on the ESO VLT. Our laser guide star adaptive...
Superdiffusion in quasi-two-dimensional Yukawa liquids (2008)
Ott, T., Donko, Z., Hartmann, P., Bonitz, M.
The emergence and vanishing of superdiffusion in quasi-two-dimensional Yukawa systems are investigated by molecular dynamics simulations. Using both the asymptotic behaviour of the mean-squared...
Mars Environment and Magnetic Orbiter model payload (2008)
Langlais, B., Leblanc, F., Fouchet, T., Barabash, S., Breuer, D., Chassefière, E., ...
Mars Environment and Magnetic Orbiter was proposed as an answer to the Cosmic Vision Call of Opportunity as a M-class mission. The MEMO mission is designed to study the strong interconnections...
Near-infrared polarization images of the Orion proplyds (2008)
We performed AO-assisted high-resolution imaging polarimetry on selected Orion proplyds close to the Trapezium stars in the J, H, and K bands. Differential polarimetric images of one of the largest...
The most massive stars in the Arches cluster (2008)
Martins, F., Hillier, D. J., Paumard, T., Eisenhauer, F., Ott, T., Genzel, R.
On the nature of the fast-moving star S2 in the galactic center (2008)
Martins, F., Gillessen, S., Eisenhauer, F., Genzel, R., Ott, T., Trippe, S.
Near-infrared observations of Sagittarius A* (2008)
Trippe, S., Paumard, T., Gillessen, S., Ott, T., Eisenhauer, F., Martins, F., ...
Multiplicity of young stars in and around R Coronae Australis (2008)
Köhler, R., Neuhäuser, R., Krämer, S., Leinert, Ch., Ott, T., Eckart, A.
15 years of high precision astrometry in the galactic center (2008)
Gillessen, S., Genzel, R., Eisenhauer, F., Ott, T., Trippe, S., Martins, F.
Near-infrared observations of Sagittarius A* (2008)
Trippe, S., Paumard, T., Gillessen, S., Ott, T., Eisenhauer, F., Martins, F., ...
Near-infrared observations of Sagittarius A (2008)
F. Eisenhauer, F. Martins, R. Genzel, S. Gillessen, S. Trippe, T. Ott, ...
We present and discuss recent near infrared observations of Sagittarius A, the supermassive black hole in the centre of our Galaxy. Since 2003 this source has been observed photometrically,...
Kinematics of the old stellar population at the galactic centre (2008)
Trippe, S., Gillessen, S., Gerhard, O. E., Bartko, H., Fritz, T. K., Maness, H. L., ...
Young stars in the galactic center: One or two disks? (2008)
Bartko, H., Eisenhauer, F., Fritz, T., Genzel, R., Gillessen, S., Martins, F., ...
Massive stars in the galactic center (2008)
Martins, F., Hillier, D. J., Genzel, R., Eisenhauer, F., Ott, T., Gillessen, S., ...
Multiplicity of young stars in and around R Coronae Australis (2008)
Köhler, R., Neuhäuser, R., Krämer, S., Leinert, Ch, Ott, T., Eckart, A.
Context: In star-forming regions like Taurus-Auriga, it has been found that most young stars are born as multiples, which theories of star formation should definitely take into account. The R CrA...
The Mesospheric Sodium Layer at Calar Alto, Spain (2007)
Sullivan Redfern, N. Ageorges, W. Hackenberg, S. Rabien, ...
The short- and long-term characteristics of the sodium layer have important implications for laser guide star systems. Short-timescale variations, in particular, may necessitate frequent refocussing...
Analysis tools and beam relay system for the ALFA Laser (2007)
Rabien Davies, R. Davies, W. Hackenberg, A. Eckart, T. Ott
The ALFA project is a joint collaboration between MPIA in Heidelberg, providing the adaptive optics, and MPE in Garching, providing the laser guide star system. In this contribution we present the...
First Observational Results from ALFA with Natural and Laser Guide Stars (2007)
R. I. Davies, Davies Hackenberg, T. Ott, A. Eckart, S. Rabien, S. Anders, ...
The sodium laser guide star adaptive optics system ALFA, which is installed at the Calar Alto 3.5-m telescope, has been undergoing an intensive optimisation phase. Observations using natural guide...
On the nature of the fast moving star S2 in the Galactic Center (2007)
Martins, F., Gillessen, S., Eisenhauer, F., Genzel, R., Ott, T., Trippe, S.
We analyze the properties of the star S2 orbiting the supermassive black hole at the center of the Galaxy. A high quality SINFONI H and K band spectrum obtained from coadding 23.5 hours of...
The most massive stars in the Arches cluster (2007)
Martins, F., Hillier, D. J., Paumard, T., Eisenhauer, F., Ott, T., Genzel, R.
We study a sample composed of 28 of the brightest stars in the Arches cluster. We analyze K-band spectra obtained with the integral field spectrograph SINFONI on the VLT. Atmosphere models computed...
Evidence for a Long-Standing Top-Heavy IMF in the Central Parsec of the Galaxy (2007)
Maness, H., Martins, F., Trippe, S., Genzel, R., Graham, J. R., Sheehy, C., ...
We classify 329 late-type giants within 1 parsec of Sgr A*, using the adaptive optics integral field spectrometer SINFONI on the VLT. These observations represent the deepest spectroscopic data set...
Stellar and wind properties of massive stars in the central parsec of the Galaxy (2007)
Martins, F., Genzel, R., Hillier, D. J., Eisenhauer, F., Paumard, T., Gillessen, S., ...
We study the stellar and wind properties of massive stars in the central cluster of the Galaxy. We use non-LTE atmosphere models including winds and line-blanketing to fit their H and K band spectra...
The structure of the nuclear stellar cluster of the Milky Way (2007)
Schoedel, R., Eckart, A., Alexander, T., Merritt, D., Genzel, R., Sternberg, A., ...
We present high-resolution seeing limited and AO NIR imaging observations of the stellar cluster within about one parsec of Sgr A*, the massive black hole at the centre of the Milky Way. Stellar...
A polarized infrared flare from Sagittarius A* and the signatures of orbiting plasma hotspots (2007)
Trippe, S., Paumard, T., Ott, T., Gillessen, S., Eisenhauer, F., Martins, F., ...
Stellar and wind properties of massive stars in the central parsec of the galaxy (2007)
Martins, F., Genzel, R., Hillier, D. J., Eisenhauer, F., Paumard, T., Gillessen, S., ...
The structure of the nuclear stellar cluster of the Milky Way (2007)
Schödel, R., Eckart, A., Alexander, T., Merritt, D., Genzel, R., Sternberg, A., ...
Stellar populations in the galactic center with SINFONI (2007)
Martins, F., Genzel, R., Paumard, T., Eisenhauer, F., Ott, T., Trippe, S., ...
The flare activity of Saggittarius A* (2007)
Eckart, A., Schödel, R., Meyer, L., Ott, T., Trippe, S., Genzel, R.
The Position of Sagittarius A*: III. Motion of the Stellar Cusp (2006)
Reid, M. J., Menten, K. M., Trippe, S., Ott, T., Genzel, R.
In the first two papers of this series, we determined the position of Sgr A* on infrared images, by aligning the positions of red giant stars with positions measured at radio wavelengths for their...
A polarised infrared flare from Sagittarius A* and the signatures of orbiting plasma hotspots (2006)
Trippe, S., Paumard, T., Ott, T., Gillessen, S., Eisenhauer, F., Martins, F., ...
In this article we summarise and discuss the infrared, radio, and X-ray emission from the supermassive black hole in the Galactic Centre, SgrA*. We include new results from near-infrared polarimetric...
Polarimetry of near-infrared flares from Sagittarius A* (2006)
Eckart, A., Schoedel, R., Meyer, L., Trippe, S., Ott, T., Genzel, R.
Context: We report new polarization measurements of the variable near-infrared emission of the SgrA* counterpart associated with the massive 3--4 10^6 solar masses Black Hole at the Galactic Center....
GCIRS 16SW: A massive eclipsing binary in the Galactic center (2006)
Martins, F, Trippe, S, Paumard, T, Ott, T, Genzel, R, Rauw, Grégor, ...
We report on the spectroscopic monitoring of GCIRS 16SW, an Ofpe/WN9 star and LBV candidate in the central parsec of the Galaxy. SINFONI observations show strong daily spectroscopic changes in the K...
GCIRS16SW: a massive eclipsing binary in the Galactic Center (2006)
Martins, F., Trippe, S., Paumard, T., Ott, T., Genzel, R., Rauw, G., ...
We report on the spectroscopic monitoring of GCIRS16SW, an Ofpe/WN9 star and LBV candidate in the central parsec of the Galaxy. SINFONI observations show strong daily spectroscopic changes in the K...
Atmospheric Turbulence Compensation with Laser Phase Shifting Interferometry (2006)
Rabien, S., Eisenhauer, F., Genzel, R., Davies, R. I., Ott, T.
Laser guide stars with adaptive optics allow astronomical image correction in the absence of a natural guide star. Single guide star systems with a star created in the earth's sodium layer can be...
Paumard, T., Genzel, R., Martins, F., Nayakshin, S., Beloborodov, A. M., Levin, Y., ...
We report the definite spectroscopic identification of 41 OB supergiants, giants and main sequence stars in the central parsec of the Galaxy. Detection of their absorption lines have become possible...
Clockwise Stellar Disk and the Dark Mass in the Galactic Center (2006)
Beloborodov, A. M., Levin, Y., Eisenhauer, F., Genzel, R., Paumard, T., Gillessen, S., ...
Two disks of young stars have recently been discovered in the Galactic Center. The disks are rotating in the gravitational field of the central black hole at radii r=0.1-0.3 pc and thus open a new...
GCIRS34W: an irregular variable in the galactic centre (2006)
Trippe, S., Martins, F., Ott, T., Paumard, T., Abuter, R., Eisenhauer, F., ...
Variations in the spectral slope of Sagittarius A* during a near-infrared flare (2006)
Gillessen, S., Eisenhauer, F., Quataert, E., Genzel, R., Paumard, T., Trippe, S., ...
The flare activity of Sagittarius A*: new coordinated mm to X-ray observations (2006)
Eckart, A., Baganoff, F. K., Schödel, R., Morris, M., Genzel, R., Bower, G. C., ...
Atmospheric turbulence compensation with laser phase shifting interferometry (2006)
Rabien, S., Eisenhauer, F., Genzel, R., Davies, R. I., Ott, T.
SINFONI data reduction software (2006)
Abuter, R., Schreiber, J., Eisenhauer, F., Ott, T., Horrobin, M., Gillessen, S.
Polarimetry of near-infrared flares from Sagittarius A* (2006)
Eckart, A., Schödel, R., Meyer, L., Trippe, S., Ott, T., Genzel, R.
GCIRS 16SW: a massive eclipsing binary in the galactic center (2006)
Martins, F., Trippe, S., Paumard, T., Ott, T., Genzel, R., Rauw, G., ...
First light of the ESO laser guide star facility (2006)
Bonaccini Calia, D., Allaert, E., Alvarez, J. L., Araujo Hauck, C., Avila, G., Bendek, E., ...
Variations in the spectral slope of Sgr A* during a NIR flare (2006)
Gillessen, Stefan, Eisenhauer, F., Quataert, E., Genzel, R., Paumard, T., Trippe, S., ...
Multi-wavelength and polarimetric observations of Sagittarius A* (2006)
Eckart, A., Schödel, R., Meyer, L., Trippe, S., Ott, T., Genzel, R., ...
Stellar orbits around Sgr A* (2006)
Trippe, S., Gillessen, S., Ott, T., Eisenhauer, F., Paumard, T., Martins, F., ...
First light of the ESO Laser Guide Star Facility (2006)
Bonaccini Calia, D., Allaert, E., Alvarez, J. L., Araujo Hauck, C., Avila, G., Bendek, E., ...
SINFONI data reduction software (2006)
Abuter, R., Schreiber, J., Eisenhauer, F., Ott, T., Horrobin, M., Gillesen, S.
Cardiomyocyte-restricted deletion of Connexin43 during mouse development (2006)
Eckardt, D., Kirchhoff, S., Kim, J.S., Degen, J., Theis, M., Ott, T., ...
Although the gap junction protein Connexin43 (Cx43) is expressed in various cell types during embryonic development, mice with a global inactivation of Cx43 survive until birth but die perinatally...
SINFONI data reduction software (2006)
Abuter, R., Schreiber, J., Eisenhauer, F., Ott, T., Horrobin, M.J., Gillesen, S.
The adaptive optics assisted near-infrared integral-field spectrograph SINFONI has been successfully commissioned at the ESO VLT and has started science operations early 2005. Its data reduction...
The Flare Activity of SgrA*; New Coordinated mm to X-Ray Observations (2005)
Eckart, A., Baganoff, F. K., Schoedel, R., Morris, M., Genzel, R., Bower, G. C., ...
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 Center. The main aim is...
Variations in the spectral slope of Sgr A* during a NIR flare (2005)
Gillessen, S., Eisenhauer, F., Quataert, E., Genzel, R., Paumard, T., Trippe, S., ...
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 is featureless and...
GCIRS34W: An irregular variable in the Galactic Centre (2005)
Trippe, S., Martins, F., Ott, T., Paumard, T., Abuter, R., Eisenhauer, F., ...
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. Diffraction...
A Black Hole in the Galactic Center Complex IRS 13E? (2005)
Schoedel, R., Eckart, A., Iserlohe, C., Genzel, R., Ott, T.
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* (Sgr A*). Because...
SINFONI in the Galactic Center: young stars and IR flares in the central light month (2005)
Eisenhauer, F., Genzel, R., Alexander, T., Abuter, R., Paumard, T., Ott, T., ...
We report 75 milli-arcsec resolution, near-IR imaging spectroscopy within the central 30 light days of the Galactic Center [...]. To a limiting magnitude of K~16, 9 of 10 stars in the central 0.4...
First simultaneous NIR/X-ray flare detection from SgrA (2005)
Eckart, A., Baganoff, F. K., Morris, M., Bautz, M. W., Brandt, W. N., Garmire, G. P., ...
Infrared excess sources in the galactic center stellar cluster (2005)
Eckart, Andreas, Moultaka, J., Viehmann, T., Straubmeier, C., Mouawad, N., Schödel, R., ...
SINFONI in the galactic center: young stars and infrared flares in the central light-month (2005)
Eisenhauer, F., Genzel, R., Alexander, T., Abuter, R., Paumard, T., Ott, T., ...
Ott, T., Van Dongen, J. T., Gunther, C., Krusell, L., Desbrosses, G., Vigeolas, H., ...
Hemoglobins are ubiquitous in nature and among the best-characterized proteins [1-9]. Genetics has revealed crucial roles for human hemoglobins [10], but similar data are lacking for plants. Plants...
Krusell, L., Krause, K., Ott, T., Desbrosses, G., Kramer, U., Sato, S., ...
Symbiotic nitrogen fixation (SNF) by intracellular rhizobia within legume root nodules requires the exchange of nutrients between host plant cells and their resident bacteria. Little is known at the...
Stellar populations in the galactic center (2005)
Martins, F., Genzel, R., Paumard, T., Abuter, R., Eisenhauer, F., Gillessen, S., ...
Detection of the Sgr A* activity at 3.8 and 4.8 microns with NACO (2004)
Clénet, Y., Rouan, D., Gratadour, D., Lacombe, F., Gendron, E., Genzel, R., ...
L'-band (lambda=3.8 microns) and M'-band (lambda=4.8 microns) observations of the Galactic Center region, performed in 2003 at VLT (ESO) with the adaptive optics imager NACO, have lead to the...
Census of the Galactic Centre early-type stars using spectro-imagery (2004)
Paumard, T., Genzel, R., Maillard, J. P., Ott, T., Morris, M., Eisenhauer, F., ...
The few central parsecs of the Galaxy are known to contain a surprising population of early-type stars, including at least 30 Wolf-Rayet stars and luminous blue variables (LBV), identified thanks to...
Moultaka, J., Eckart, A., Viehmann, T., Mouawad, N., Straubmeier, C., Ott, T., ...
We present the first L-band spectroscopic observations for a dozen stellar sources in the central 0.5 pc of the GC stellar cluster that are bright in the 2-4 micron wavelength domain. With the aid of...
First Simultaneous NIR/X-ray Detection of a Flare from SgrA* (2004)
Eckart, A., Baganoff, F. K., Morris, M., Bautz, M. W., Brandt, W. N., Garmire, G. P., ...
We report on the first simultaneous near-infrared/X-ray detection of the Sgr A* counterpart which is associated with the massive black hole at the center of the Milky Way. The observations have been...
First results from SPIFFI. I: The Galactic Center (2004)
Horrobin, M., Eisenhauer, F., Tecza, M., Thatte, N., Genzel, R., Abuter, R., ...
The infrared L'-band view of the Galactic Center with NAOS-CONICA at VLT (2004)
Clénet, Y., Rouan, D., Gendron, E., Lacombe, F., Mouillet, D., ...
Detection of the Sgr A activity at 3.8 and 4.8 µm with NACO (2004)
Clénet, Y., Rouan, D., Gratadour, D., Lacombe, F., Gendron, E., Genzel, R., ...
First simultaneous NIR/X-ray detection of a flare from Sgr A (2004)
Eckart, A., Baganoff, F. K., Morris, M., Bautz, M. W., Brandt, W. N., Garmire, G. P., ...
Test performance of the PARSEC laser system (2004)
Rabien, S., Davies, R. I., Ott, T., Li, J., Abuter, R., Kellner, S., ...
Colebatch, G., Desbrosses, G., Ott, T., Krusell, L., Montanari, O., Kloska, S., ...
Research on legume nodule metabolism has contributed greatly to our knowledge of primary carbon and nitrogen metabolism in plants in general, and in symbiotic nitrogen fixation in particular....
Desbrosses, G., Kopka, C., Ott, T., Udvardi, M. K.
The KUP family of potassium transporters in plants is large but poorly characterized. We isolated and characterized the first KUP transporter from a legume, LjKUP of Lotus japonicus. Although...
The infrared L'-band view of the Galactic Center with NAOS-CONICA at VLT (2003)
Clénet, Y., Rouan, D., Gendron, E., Lacombe, F., Rousset, G., ...
We report on Galactic Center L'-band observations made during NAOS/CONICA Science Verification. Colors of the inner 2" stars reveal an infrared excess of S2, the closest star to the black hole, that...
Aspects of Stability and Phenomenology in Type IIA Orientifolds with Intersecting D6-branes (2003)
Intersecting branes have been the subject of string model building for several years. This work introduces in detail the toroidal and Z_N-orientifolds, where the main discussion employs the picture...
A Geometric Determination of the Distance to the Galactic Center (2003)
Eisenhauer, F., Schoedel, R., Genzel, R., Ott, T., Tecza, M., Abuter, R., ...
We report new astrometric and spectroscopic observations of the star S2 orbiting the massive black hole in the Galactic Center, which were taken at the ESO VLT with the adaptive optics assisted,...
Stellar dynamics in the central arcsecond of our galaxy (2003)
Schoedel, R., Genzel, R., Ott, T., Eckart, A., Mouawad, N., Alexander, T.
We present proper motions for $>$40 stars at projected distances $\leq1.2''$ from Sagittarius A* (Sgr A*). We find evidence on a $\geq2\sigma$ level for radial anisotropy of the cluster of stars...
The Stellar Cusp Around the Supermassive Black Hole in the Galactic Center (2003)
Genzel, R., Schoedel, R., Ott, T., Eisenhauer, F., Hofmann, R., Lehnert, M., ...
We analyze deep near-IR adaptive optics imaging as well as new proper motion data of the nuclear star cluster of the Milky Way. The surface density distribution of faint stars peaks within 0.2" of...
The Galactic Center stellar cluster: The central arcsecond (2003)
Schoedel, R., Genzel, R., Ott, T., Eckart, A.
With 10 years of high-resolution imaging data now available on the stellar cluster in the Galactic Center, we analyze the dynamics of the stars at projected distances $\leq1.2''$ from the central...
The Position, Motion, and Mass of Sgr A* (2003)
Reid, M. J., Menten, K. M., Genzel, R., Ott, T., Schoedel, R., Eckart, A., ...
We report progress on measuring the position of Sgr A* on infrared images, placing limits on the motion of the central star cluster relative to Sgr A*, and measuring the proper motionof Sgr A*...
Inward Bound: Studying the Galactic Centre with NAOS/CONICA (2003)
Ott, T., Schoedel, R., Genzel, R., Eckart, A., Lacombe, F., Rouan, D., ...
We report on the first results obtained using adaptive optics measurements of the Galactic Centre done with NAOS/CONICA.
The VLT laser guide star facility (2003)
Bonaccini, D., Allaert, E., Araujo, C., Brunetto, E., Buzzoni, B., Comin, M., ...
The stellar cusp around the supermassive black hole in the galactic center (2003)
Genzel, R., Schödel, R., Ott, T., Eisenhauer, F., Hofmann, R., Lehnert, M., ...
Stellar dynamics in the central arcsecond of our galaxy (2003)
Schödel, R., Ott, T., Genzel, R., Eckart, A., Mouawad, N., Alexander, T.
A geometric determination of the distance to the Galactic center (2003)
Eisenhauer, F., Schödel, R., Genzel, R., Ott, T., Tecza, M., Abuter, R., ...
Stellar orbits at the center of the Milky Way (2003)
Mouawad, N., Eckart, A., Pfalzner, S., Moultaka, J., Straubmeier, C., Spurzem, R., ...
New MIR excess sources north of the IRS 13 complex (2003)
Eckart, A., Moultaka, J., Viehmann, T., Straubmeier, C., Mouawad, N., Genzel, R., ...
Monitoring Sagittarius A* in the MIR with the VLT (2003)
Eckart, A., Moultaka, J., Viehmann, T., Straubmeier, C., Mouawad, N., Genzel, R., ...
Inward bound: studying the Galactic Centre with NAOS/CONICA (2003)
Ott, T., Schödel, R., Genzel, R., Eckart, A., Lacombe, F., Rouan, D., ...
The position, motion, and mass of SgrA* (2003)
Reid, M. J., Menten, K. M., Genzel, R., Ott, T., Schödel, R., Brunthaler, A.
Reid, M. J., Menten, K. M., Genzel, R., Ott, T., Schödel, R., Eckart, A.
In 1979, Menten and coworkers accurately determined the position of Sgr A* on an infrared image by aligning the infrared image with positions measured for SiO masers, associated with infrared-bright...
The stellar cusp around the supermassive black hole in the galactic center (2003)
Genzel, R., Schödel, R., Ott, T., Eisenhauer, F., Hofmann, R., Lehnert, M., ...
We analyze deep near-IR adaptive optics imaging (taken with NAOS/CONICA on the Very Large Telescope at the European Southern Observatory, Chile), as well as new proper-motion data of the nuclear star...
Limits for massive planets in wide orbits from direct imaging searches (2003)
Neuhäuser, R., Guenther, E., Alves, J., Brandner, W., Ott, T., Eckart, A.
Direct imaging of extra-solar planets around young nearby stars - a progress report (2003)
Neuhäuser, R., Guenther, E., Brandner, W., Alves, J., Comerón, F., Mugrauer, M., ...
Inward bound: Studying the galactic centre with NAOS/CONICA (2003)
Ott, T., Schödel, R., Genzel, R., Eckart, A., Lacombe, F., Rouan, D., ...
Not Available
II. Accurate Positions and Proper Motions of Stellar SiO Masers near the Galactic Center (2002)
Reid, M. J., Menten, K. M., Genzel, R., Ott, T., Schoedel, R., Eckart, A.
Menten, Reid, Eckart and Genzel (1997) accurately determined the position of Sgr A* on an infrared image, by aligning the infrared image with positions measured for SiO masers, associated with...
Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way (2002)
Schodel, R., Ott, T., Genzel, R., Hofmann, R., Lehnert, M., Eckart, A., ...
Measurements of stellar velocities and variable X-ray emission near the centre of the Milky Way have provided the strongest evidence so far that the dark mass concentrations seen in many galactic...
Stellar Orbits Near Sagittarius A* (2002)
Eckart, A., Genzel, R., Ott, T., Schoedel, R.
We present new SHARP/NTT stellar proper motion and accelaration data covering an interval from 1992 to 2000: 1) We combine the high precision but shorter time scale NIRC/Keck data with the lower...
Neuhäuser, R., Guenther, E., Mugrauer, M., Ott, T., Eckart, A.
We present JHK images of the young (similar to20 Myrs) nearby (similar to48 pc) stars HD 199143 and HD 358623 ( van den Ancker et al. 2000) with high sensitivity and high dynamic range in order to...
Stellar orbits near Sagittarius A (2002)
Eckart, A., Genzel, R., Ott, T., Schödel, R
The SHARP/NTT stellar proper motion data now cover an interval from 1992 to 2000 and allow us to determine orbital accelerations for some of the most central stars of the Galaxy. We confirm the...
Spatially resolved imaging spectroscopy of T Tauri (2002)
Kasper, M. E., Feldt, M., Herbst, T. M., Hippler, S., Ott, T., Tacconi-Garman, L. E.
The small separation of the individual stellar components in the T Tau system has prevented spectroscopy of the individual components in the near-infrared (NIR) in the past. We present NIR data (H...
A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way (2002)
Schödel, R., Ott, T., Genzel, R., Hofmann, R., Lehnert, M., Eckart, A., ...
Many galaxies are thought to have supermassive black holes at their centres(1)-more than a million times the mass of the Sun. Measurements of stellar velocities(2-7) and the discovery of variable...
Multi-conjugate adaptive optics with laser guide stars (2002)
Davies, R. I., Bonaccini, D., Rabien, S., Hackenberg, W., Ott, T., Hippler, S., ...
A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way (2002)
Schödel, R., Ott, T., Genzel, R., Hofmann, R., Lehnert, M., Eckart, A., ...
Many galaxies are thought to have supermassive black holes at their centres(1)-more than a million times the mass of the Sun. Measurements of stellar velocities(2-7) and the discovery of variable...
Multi-Conjugate Adaptive Optics with Laser Guide Stars (2002)
Davies, R. I., Bonaccini, D., Rabien, S., Hackenberg, W., Ott, T., Hippler, S., ...
A star in a 15.2-year orbit around the supermassive black hole at the centre of the Milky Way (2002)
Schödel, R., Ott, T., Genzel, R., Hofmann, R., Lehnert, M., Eckart, A., ...
Deep infrared imaging and spectroscopy of the nearby late M-dwarf DENIS-P J104814-395606. (2002)
Neuhauser, R., Guenther, E. W., Alves, J., Grosso, N., Leinert, C., Ratzka, T., ...
Not Available
Spatially Resolved Imaging Spectroscopy of T Tauri (2002)
Kasper, M. E., Feldt, M., Herbst, T. M., Hippler, S., Ott, T., Tacconi-Garman, L. E.
Spatially resolved imaging spectroscopy of T Tauri (2001)
Kasper, M. E., Feldt, M., Herbst, T. M., Hippler, S., Ott, T., Tacconi-Garman, L. E.
The small separation of the individual stellar components in the TTau system has prevented spectroscopy of the individual components in the near-infrared (NIR) in the past. We present NIR data (H-...
Multi-Conjugate Adaptive Optics with Laser Guide Stars (2001)
Davies, R. I., Bonaccini, D., Rabien, S., Hackenberg, W., Ott, T., Hippler, S., ...
The Laser Guide Star Facility for the VLT will be commissioned during 2003. This, of course, can only be the first step towards enhancing the scientific output of the VLT through adaptive optics. So...
Adaptive Optics Integral Field Spectroscopy of the Young Stellar Objects in LkH_alpha 225 (2001)
Davies, R. I., Tecza, M., Looney, L. W., Eisenhauer, F., Tacconi-Garman, L. E., Thatte, N., ...
Progress in understanding the embedded stars in LkHa225 has been hampered by their variability, making it hard to compare data taken at different times, and by the limited resolution of the available...
Direct imaging search for planetary companions next to young nearby stars (2000)
Neuhaeuser, R., Guenther, E., Brandner, W., Huelamo, N., Ott, T., Alves, J., ...
We report first results from our ground-based infrared imaging search for sub-stellar companions (brown dwarfs and giant planets) of young (up to 100 Myrs) nearby (up to 75 pc) stars, where...
Hackenberg, W., Eckart, A., Davies, R. I., Rabien, S., Ott, T., Kasper, M., ...
We report on high angular resolution near-infrared (NIR) observations of three galaxy clusters at different redshifts using adaptive optics (AO). In the case of the barred spiral \object{UGC 1347} in...
Stellar Dynamics in the Galactic centre: Proper Motions and Anisotropy (2000)
Genzel, R., Pichon, C., Eckart, A., Gerhard, O. E., Ott, T.
We report a new analysis of stellar dynamics in the Galactic centre, based on improved sky and LOS velocities for >100 stars within a few arcsec of SgrA*. Overall the motions do not deviate strongly...
iViP-Teilprojekt 4.4 - Virtueller Prüfstand (2000)
Benölken, P., Ott, T., Maurer, H.
Eine durchgehende Digitalisierung des Produktentstehungsprozesses wird heute als der Schlüssel zur Steigerung der Wettbewerbsfähigkeit angesehen. Einen neuen Ansatz auf diesem Weg stellt die...
iViP subproject 4.4 - virtual test bench (2000)
Benölken, P., Maurer, H., Ott, T.
A completely computer supported product development process is nowadays regarded as the key to increasing competitiveness. Virtual product development is a new approach to achieving this aim. In this...
Neuhaeuser, R., Brandner, W., Eckart, A., Guenther, E., Alves, J., Ott, T., ...
We show that {\em ground-based} direct imaging detection of extra-solar planets is possible with current technology. As an example, we present evidence for a possible planetary companion to the young...
The ALFA Laser: Beam Relay and Control System (1999)
Ott, T., Hackenberg, W., Rabien, S., Eckart, A., Hippler, S.
The ALFA laser subsystem uses a 4 watt continuous wave laser beam to produce an artificial guide star in the mesospheric sodium layer as a reference for wavefront sensing. In this article we describe...
The ALFA laser guide star: Operation and Results (1999)
Davies, R., Eckart, A., Hackenberg, W., Ott, T., Butler, D., Kasper, M., ...
The importance of laser guide stars to the practical usefulness of adaptive optics cannot be understated, and yet there are very few working systems. This contribution discusses the current status of...
The ALFA Laser and Analysis Tools (1999)
Rabien, S., Ott, T., Hackenberg, W., Eckart, A., Davies, R., Kasper, M., ...
The optimal performance of adaptive optics systems can only be maintained if the wavefront reference is bright and compact. Experience has shown that both of these important criteria are remarkably...
First Observational Results from ALFA with Natural and Laser Guide Stars (1998)
Davies, R. I., Hackenberg, W., Ott, T., Eckart, A., Rabien, S., Anders, S., ...
The sodium laser guide star adaptive optics system ALFA, which is installed at the Calar Alto 3.5-m telescope, has been undergoing an intensive optimisation phase. Observations using natural guide...
Davies, R. I., Hackenberg, W., Ott, T., Eckart, A., Rabien, S., ...
The sodium laser guide star adaptive optics system ALFA has been constructed at the Calar Alto 3.5-m telescope. Following the first detection of the laser beacon on the wavefront sensor in 1997 the...
Diplomarbeit, Universität Karlsruhe 1995
Parrish, M., Ott, T., Lance-Jones, C., Schuetz, G., Schwaeger-Nickolenko, A., Monaghan, A. P.
Members of the Spalt gene family encode putative transcription factors characterized by seven to nine C2H2 zinc finger motifs. Four genes have been identified in mice—Spalt1 to Spalt4 (Sall1 to...
Parrish, M., Ott, T., Lance-Jones, C., Schuetz, G., Schwaeger-Nickolenko, A., Monaghan, A. P.
Members of the Spalt gene family encode putative transcription factors characterized by seven to nine C2H2 zinc finger motifs. Four genes have been identified in mice—Spalt1 to Spalt4 (Sall1 to...