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ALMA Observations of the Water Fountain Pre-Planetary Nebula IRAS 16342-3814: High-velocity bipolar jets and an Expanding Torus
R. Sahai, W. H. T. Vlemmings, T. Gledhill +4
We have mapped 12CO J=3-2 and other molecular lines from the "water-fountain" bipolar pre-planetary nebula (PPN) IRAS 16342-3814 with ~0."35 resolution using ALMA. We find (i) two…
ALMA Compact Array observations of the Fried Egg nebula: Evidence for large-scale asymmetric mass-loss from the yellow hypergiant IRAS 17163-3907
Sofia Wallstrom, E. Lagadec, S. Muller +12
Yellow hypergiants are rare and represent a fast evolutionary stage of massive evolved stars. That evolutionary phase is characterised by a very intense mass loss, the understandin…
ALMA high spatial resolution observations of the dense molecular region of NGC 6302
M. Santander-García, V. Bujarrabal, J. Alcolea +5
The mechanism behind the shaping of bipolar planetary nebulae is still poorly understood. Accurately tracing the molecule-rich equatorial regions of post-AGB stars can give valuabl…
The millimeter IRAM-30m line survey toward IK Tau
L. Velilla Prieto, C. Sánchez Contreras, J. Cernicharo +8
We carried out a millimeter wavelength line survey between 79 and 356 GHz with the IRAM-30m telescope to investigate the physical and chemical properties of the molecular envelope…
A lambda 3mm and 1mm line survey toward the yellow hypergiant IRC +10420
G. Quintana-Lacaci, M. Agúndez, J. Cernicharo +4
Our knowledge of the chemical properties of the circumstellar ejecta of the most massive evolved stars is particularly poor. We aim to study the chemical characteristics of the pro…