6 papers
Star Formation in the W49A Molecular Cloud: Birth of a Massive Star Cluster
N. L. Homeier, J. Alves
The W49A star-forming region is embedded in a 10^6 solar mass molecular cloud, one of the most massive in our Galaxy. It has been long known as one of the most luminous radio HII r…
An infrared imaging search for low-mass companions to members of the young nearby beta Pic and Tucana/Horologium associations
Ralph Neuh"auser, E. W. Guenther, J. Alves +3
We present deep high dynamic range infrared images of young nearby stars in the Tucana/Horologium and beta Pic associations, all ~ 10 to 35 Myrs young and at ~10 to 60 pc distance.…
Imaging and spectroscopy of DENIS-P J104814-395606
Ralph Neuhaeuser, Eike Guenther, Joao Alves +8
We obtained deep H- and K-band images of DENIS-P J104814-395606 using SofI and the speckle camera SHARP-I at the ESO-3.5m-NTT as well as QUIRC at the Mauna Kea 2.2m telescope betwe…
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…
Direct imaging search for planetary companions next to young nearby stars
R. Neuhaeuser, E. Guenther, W. Brandner +6
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) sta…
On the possibility of ground-based direct imaging detection of extra-solar planets: The case of TWA-7
R. Neuhaeuser, W. Brandner, A. Eckart +5
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 com…