Cecilia Ceccarelli

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Iso-Lws mapping observations of the Serpens molecular cloud core are presented. The spectral range is 50 − 200μm and the map size is 8 × 8. These observations suffer from severe source confusion at Fir wavelengths and we employ a Maximum Likelihood Method for the spectrospatial deconvolution. The strong and fairly isolated source SMM 1/FIRS 1 presented a(More)
We study the efficiency of the noble gases sequestration by the ion H3 in the form of XH3 complexes (with X = argon, krypton or xenon) in gas phase conditions similar to those encountered during the cooling of protoplanetary disks, at the epoch of icy planetesimals formation. We show that XH3 complexes form very stable structures in the gas phase and that(More)
The Solar System formed about 4.6 billion years ago from a condensation of matter inside a molecular cloud. Trying to reconstruct what happened is the goal of this chapter. For that, we put together our understanding of Galactic objects that will eventually form new suns and planetary systems, with our knowledge on comets, meteorites and small bodies of the(More)
We report the discovery of doubly deuterated water (D2O, heavy water) in the interstellar medium. Using the James Clerk Maxwell Telescope and the Caltech Submillimeter Observatory 10 m telescope, we detected the 110–101 transition of para-D2O at 316.7998 GHz in both absorption and emission toward the protostellar binary system IRAS 16293 2422. Assuming that(More)
We have obtained the first high spatial (0. 05) and spectral (R ∼ 35000) resolution 2μm spectrum of the TTau S tight binary system using adaptive optics on the Keck II telescope. We have also obtained the first 3.8 and 4.7μm images that resolve the three components of the TTau multiple system, as well as new 1.6 and 2.2μm images. Together with its very red(More)
We report observations of the expected main S-bearing species (SO, SO2 and H2S) in the low-mass star forming region L1689N. We obtained large scale (∼ 300′′x200′′) maps of several transitions from these molecules with the goal to study the sulphur chemistry, i.e. how the relative abundances change in the different physical conditions found in L1689N. We(More)
We have obtained the full 1–200 μm spectrum of the low luminosity (36 L ) Class I protostar Elias 29 in the ρ Ophiuchi molecular cloud. It provides a unique opportunity to study the origin and evolution of interstellar ice and the interrelationship of interstellar ice and hot core gases around low mass protostars. We see abundant hot CO and H2O gas, as well(More)
The BASECOL2012 database is a repository of collisional data and a web service within the Virtual Atomic and Molecular Data Centre (VAMDC, http://www.vamdc.eu). It contains rate coefficients for the collisional excitation of rotational, ro-vibrational, vibrational, fine, and hyperfine levels of molecules by atoms, molecules, and electrons, as well as(More)