1.2k citations · 5.3k across the 49 of their papers we have counts for
25 papers · 1 filter
Dynamical masses for the nearest brown dwarf binary: Epsilon Indi Ba, Bb
C. V. Cardoso, M. J. McCaughrean, R. R. King +6
We present preliminary astrometric results for the closest known brown dwarf binary to the Sun: Epsilon Indi Ba, Bb at a distance of 3.626 pc. Via ongoing monitoring of the relativ…
Near-infrared wavefront sensing for the VLT interferometer
Stefan Hippler, Wolfgang Brandner, Yann Clénet +11
The very large telescope (VLT) interferometer (VLTI) in its current operating state is equipped with high-order adaptive optics (MACAO) working in the visible spectrum. A low-order…
GRAVITY: getting to the event horizon of Sgr A*
F. Eisenhauer, G. Perrin, W. Brandner +45
We present the second-generation VLTI instrument GRAVITY, which currently is in the preliminary design phase. GRAVITY is specifically designed to observe highly relativistic motion…
METIS - the Mid-infrared E-ELT Imager and Spectrograph
Bernhard R. Brandl, Rainer Lenzen, Eric Pantin +19
METIS, the Mid-infrared ELT Imager and Spectrograph (formerly called MIDIR), is a proposed instrument for the European Extremely Large Telescope (E-ELT), currently undergoing a pha…
A comprehensive examination of the Eps Eri system -- Verification of a 4 micron narrow-band high-contrast imaging approach for planet searches
Markus Janson, Sabine Reffert, Wolfgang Brandner +3
Due to its proximity, youth, and solar-like characteristics with a spectral type of K2V, Eps Eri is one of the most extensively studied systems in an extrasolar planet context. Bas…
Mid-Infrared Instrumentation for the European Extremely Large Telescope
S. Kendrew, B. Brandl, R. Lenzen +5
MIDIR is the proposed thermal/mid-IR imager and spectrograph for the European Extremely Large Telescope (E-ELT). It will cover the wavelength range of 3 to at least 20 microns. Des…
Constraints on Extrasolar Planet Populations from VLT NACO/SDI and MMT SDI and Direct Adaptive Optics Imaging Surveys: Giant Planets are Rare at Large Separations
Eric L. Nielsen, Laird M. Close, Beth A. Biller +2
We examine the implications for the distribution of extrasolar planets based on the null results from two of the largest direct imaging surveys published to date. Combining the mea…
An Imaging Survey for Extrasolar Planets around 45 Close, Young Stars with SDI at the VLT and MMT
Beth A. Biller, Laird M. Close, Elena Masciadri +11
We present the results of a survey of 45 young (<250 Myr), close (<50 pc) stars with the Simultaneous Differential Imager (SDI) implemented at the VLT and the MMT for the direct de…
NACO-SDI direct imaging search for the exoplanet Eps Eri b
Markus Janson, Wolfgang Brandner, Thomas Henning +13
The active K2V star Eri hosts the most nearby known extrasolar planet. With an angular separation of about 1" on average, and an age of a few to several hundred Myrs, Eri b…
Improved age constraints for the AB Dor quadruple system - The binary nature of AB Dor B
Markus Janson, Wolfgang Brandner, Rainer Lenzen +5
We present resolved NACO photometry of the close binary AB Dor B in H- and Ks-band. AB Dor B is itself known to be a wide binary companion to AB Dor A, which in turn has a very low…
A direct and differential imaging search for sub-stellar companions to epsilon Indi A
K. Geissler, S. Kellner, W. Brandner +7
We have carried out a direct and differential imaging search for sub-stellar companions to eps Indi A using the adaptive optics system NACO at the ESO VLT. The observations were ca…
A Survey of Close, Young Stars with the Simultaneous Differential Imager (SDI) at the VLT and MMT
Beth A. Biller, Laird M. Close, Elena Masciadri +6
We discuss the preliminary results of a survey of young (<300 Myr), close (<50 pc) stars with the Simultaneous Differential Extrasolar Planet Imager (SDI) implemented at the VLT an…
Suppressing Speckle Noise for Simultaneous Differential Extrasolar Planet Imaging (SDI) at the VLT and MMT
Beth A. Biller, Laird M. Close, Rainer Lenzen +5
We discuss the instrumental and data reduction techniques used to suppress speckle noise with the Simultaneous Differential Imager (SDI) implemented at the VLT and the MMT. SDI use…
AB Doradus C: Age, Spectral Type, Orbit, and Comparison to Evolutionary Models
E. L. Nielsen, L. M. Close, J. C. Guirado +5
We expand upon the results of Close et al. 2005 regarding the young, low-mass object AB Dor C and its role as a calibration point for theoretical tracks. We present an improved spe…
VLT Diffraction Limited Imaging and Spectroscopy in the NIR: Weighing the black hole in Centaurus A with NACO
N. Haering-Neumayer, M. Cappellari, H. -W. Rix +4
We present high spatial resolution near-infrared spectra and images of the nucleus of Centaurus A (NGC 5128) obtained with NAOS-CONICA at the VLT. The adaptive optics corrected dat…
The Arches Cluster - Evidence for a Truncated Mass Function?
Andrea Stolte, Wolfgang Brandner, Eva K. Grebel +2
We have analyzed high-resolution, adaptive optics (AO) HK observations of the Arches cluster obtained with NAOS/CONICA. With a spatial resolution of 84 mas, the cluster center is u…
The sub-arcsecond dusty environment of Eta Carinae
O. Chesneau, M. Min, T. Herbst +15
The core of the nebula surrounding Eta Carinae has been observed with the VLT Adaptive Optics system NACO and with the interferometer VLTI/MIDI to constrain spatially and spectrall…
NACO Polarimetric Differential Imaging of TW Hya: A Sharp Look at the Closest T Tauri Disk
D. Apai, I. Pascucci, W. Brandner +5
We present high-contrast imaging data on the disk of the classical T Tauri star TW Hya. The images were obtained through the polarimetric differential imaging technique with the ad…
Epsilon Indi Ba/Bb: the nearest binary brown dwarf
M. J. McCaughrean, L. M. Close, R. -D. Scholz +5
We have carried out high angular resolution near-infrared imaging and low-resolution (R~1000) spectroscopy of the nearest known brown dwarf, Eps Indi B, using the ESO VLT NAOS/CONI…
Direct measurement of the size and shape of the present-day stellar wind of Eta Carinae
R. van Boekel, P. Kervella, M. Schoeller +7
We present new high angular resolution observations at near-IR wavelengths of the core of the Luminous Blue Variable Eta Carinae, using NAOS-CONICA at the VLT and VINCI at the VLT…
First NACO observations of the Brown Dwarf LHS 2397aB
E. Masciadri, W. Brandner, H. Bouy +3
Observations of the standard late type M8 star LHS 2397aA were obtained at the ESO-VLT 8m telescope ``Yepun'' using the NAOS/CONICA Adaptive Optics facility. The observations were…
The Stellar Cusp Around the Supermassive Black Hole in the Galactic Center
R. Genzel, R. Schoedel, T. Ott +12
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 peak…
VLT/NACO adaptive optics imaging of the TY CrA system - A fourth stellar component candidate detected
G. Chauvin, A-M. Lagrange, H. Beust +11
We report the detection of a possible subsolar mass companion to the triple young system TY CrA using the NACO instrument at the VLT UT4 during its commissioning. Assuming for TY C…
Inward Bound: Studying the Galactic Centre with NAOS/CONICA
T. Ott, R. Schoedel, R. Genzel +25
We report on the first results obtained using adaptive optics measurements of the Galactic Centre done with NAOS/CONICA.