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The Evolution of Circumstellar Disks: Lessons from the VLT and ISO
Wolfgang Brandner, Dan Potter, Scott S. Sheppard +2
There is strong evidence that the planets in the solar system evolved from a disk-shaped solar nebula ~4.56 Gyr ago. By studying young stars in various evolutionary stages, one aim…
NGC 3603 - a Local Template for Massive Young Clusters
B. Brandl, W. Brandner, F. Eisenhauer +3
We present a study of the star cluster associated with the massive Galactic HII region NGC3603 based on near-IR broad-- and narrowband observations taken with ISAAC/VLT under excel…
Observing the planet formation time-scale by ground-based direct imaging of planetary companions to young nearby stars: Gemini/Hokupa'a image of TWA-5
Ralph Neuhaeuser, Dan Potter, Wolfgang Brandner
Many extra-solar planets and a few planetary systems have been found indirectly by small periodic radial velocity variations around old nearby stars. The orbital characteristics of…
Multiplicity of young brown dwarfs in Cha I
V. Joergens, E. Guenther, R. Neuhäuser +4
How frequent are brown dwarf binaries? Do brown dwarfs have planets? Are current theoretical pre-main-sequence evolutionary tracks valid down to the substellar regime? - Any detect…
Ground-based exoplanet near-infrared search by imaging and spectroscopy: 3 new companion candidates in TWA
Ralph Neuhaeuser, Nuria Huelamo, Eike W. Guenther +5
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 100 pc) st…