9 papers
First evidence for a spatially resolved disk structure around the Herbig Ae star R CrA
S. Correia, R. Koehler, G. Meeus +1
We present mid-infrared interferometric observations of the Herbig Ae star R CrA obtained with MIDI at the VLTI using several projected baselines in the UT2-UT3 configuration. The…
An accelerated Monte Carlo method to solve two-dimensional radiative transfer and molecular excitation
Michiel R. Hogerheijde, Floris F. S. van der Tak
We present a numerical method and computer code to calculate the radiative transfer and excitation of molecular lines. Formulating the Monte Carlo method from the viewpoint of cell…
The Elusive Active Nucleus of NGC 4945
A. Marconi, E. Oliva, P. P. van der Werf +4
We present new HST NICMOS observations of NGC 4945, a starburst galaxy hosting a highly obscured active nucleus that is one of the brightest extragalactic sources at 100 keV. The H…
MHD Turbulence in Star-Forming Clouds
Mordecai-Mark Mac Low, Ralf Klessen, Fabian Heitsch
We review how supersonic turbulence can both prevent and promote the collapse of molecular clouds into stars. First we show that decaying turbulence cannot significantly delay coll…
Giant and `double-double' radio galaxies: Implications for the evolution of powerful radio sources and the IGM
A. P. Schoenmakers, A. G. de Bruyn, H. J. A. Röttgering +3
Giant radio sources form the linear size extreme of the extra-galactic radio source population. Using the WENSS survey, we have selected a complete sample of these sources. We have…
HST Snapshot Survey of 3CR Quasars: The Data
Matthew D. Lehnert, George K. Miley, William B. Sparks +6
We present images taken with the Wide Field Planetary Camera (WFPC-2) on the Hubble Space Telescope of 43 quasars selected from the 3CR radio catalog. The redshift range of the tar…