20 citations · 22 across the 5 of their papers we have counts for
5 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…