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Mass segregation and elongation of the starburst cluster Westerlund 1
Mario Gennaro, Wolfgang Brandner, Andrea Stolte +1
Massive stellar clusters are the best available laboratories to study the mass function of stars. Based on NTT/SofI near-infrared photometry, we have investigated the properties of…
The substellar mass function in the central region of the open cluster Praesepe from deep LBT observations
W. Wang, S. Boudreault, B. Goldman +3
Studies of the mass function (MF) of open clusters of different ages allow us to probe the efficiency with which brown dwarfs (BDs) are evaporated from clusters to populate the fie…
Nitrogen hydrides in the cold envelope of IRAS16293-2422
Pierre Hily-Blant, Sébastien Maret, Aurore Bacmann +4
Nitrogen is the fifth most abundant element in the Universe, yet the gas-phase chemistry of N-bearing species remains poorly understood. Nitrogen hydrides are key molecules of nitr…
The distribution of water in the high-mass star-forming region NGC 6334I
M. Emprechtinger, D. C. Lis, T. Bell +66
We present observations of twelve rotational transitions of H2O-16, H2O-18, and H2O-17 toward the massive star-forming region NGC 6334 I, carried out with Herschel/HIFI as part of…
Structure and Composition of Two Transitional Circumstellar Disks in Corona Australis
A. M. Hughes, S. M. Andrews, D. J. Wilner +10
The late stages of evolution of the primordial circumstellar disks surrounding young stars are poorly understood, yet vital to constrain theories of planet formation. We consider b…
Testing the theory of grain growth and fragmentation by millimeter observations of protoplanetary disks
T. Birnstiel, L. Ricci, F. Trotta +7
Context. Observations at sub-millimeter and mm wavelengths will in the near future be able to resolve the radial dependence of the mm spectral slope in circumstellar disks with a r…