8 papers
Methanol emission from low mass protostars
S. Maret, C. Ceccarelli, A. G. G. M. Tielens +5
We present observations of methanol lines in a sample of Class 0 low mass protostars. Using a 1-D radiative transfer model, we derive the abundances in the envelopes. In two source…
A submillimeter line survey of low-mass protostars: prelude to ALMA and Herschel
E. F. van Dishoeck, J. K. Joergensen, S. Maret +5
The results from a single-dish molecular line survey of a set of 18 deeply embedded young stellar objects are summarized. More than 40 lines from 16 different species were observed…
Water emission in NGC1333-IRAS4: Probing its surrounding envelope
S. Maret, C. Ceccarelli, E. Caux +2
Sun like stars are born from the collapse of fragment of molecular clouds. During the first embedded phase (the so called class 0/1), the protostar is surrounded by a collapsing en…
Infrared Observations of Hot Gas and Cold Ice toward the Low Mass Protostar Elias 29
A. C. A. Boogert, A. G. G. M. Tielens, C. Ceccarelli +5
We have obtained the full 1-200 um spectrum of the low luminosity (36 Lsun) Class I protostar Elias 29 in the Rho Ophiuchi molecular cloud. It provides a unique opportunity to stud…
Mid-infrared ISO spectroscopy of NGC 4945
H. W. W. Spoon, J. Koornneef, A. F. M. Moorwood +2
We have observed the central region of the nearby starburst galaxy NGC4945 with the mid-infrared spectrometers SWS and PHT-S aboard ISO. We do not find any evidence for the existen…
HST/NICMOS Imaging of the Planetary Nebula Hubble 12
Joseph L. Hora, William B. Latter, Aditya Dayal +4
Images of Hubble 12 were obtained with the HST/NICMOS instrument in the F110W, F164N, and F166N filters of NIC1, and the F160W, F187N, F190N, F212N, F215N filters of NIC2. The imag…