20 citations · 22 across the 8 of their papers we have counts for
22 papers
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…
A NICMOS Direct Imaging Search for Giant Planets around the Single White Dwarfs in the Hyades
S. Friedrich, H. Zinnecker, W. Brandner +2
We report preliminary results from our search for massive giant planets (6-12 Jupiter masses) around the known seven single white dwarfs in the Hyades cluster at sub-arcsec separat…
Binaries among Ultra-cool Dwarfs and Brown Dwarfs
Wolfgang Brandner, Herve Bouy, Eduardo L. Martin +1
Observations of brown dwarfs provide important feedback on theories of atmospheres and inner structure of substellar objects. Brown dwarf binary systems furthermore offer the uniqu…
Halo Mass Function: Low-mass Stars in Deep Fields
Wolfgang Brandner
Deep fields are unique probes of the Galactic halo. With a limiting magnitude of, e.g., I = 30 mag, all stars down to the hydrogen-burning limit are detected out to distances of 10…
Near-IR observations of UCHII regions
Carlos Alvarez, Markus Feldt, Thomas Henning +3
We present adaptive-optics (AO) assisted J, H and K/K' images of 8 UCHII regions taken with the ALFA and ADONIS AO systems at Calar Alto and La Silla observatories. The images show…
Adaptive Optics in Star Formation
Wolfgang Brandner
Over the past ten years, the concept of adaptive optics has evolved from early experimental stages to a standard observing tool now available at almost all major optical and near-i…