Other
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p..88e&link_type=abstract
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole
Other
Scientific paper
The formation of complex molecules in massive star forming regions usually has its origin in the hot core. During cloud collapse, depletion of molecules onto dust surfaces takes place. When a newly protostar forms, the surrounding gas and dust is heated and molecules sublimate from grain mantles giving rise to new species in the warm gas-phase. On the other hand, the existence of molecular outflows and associated shocked regions, plays also an important role in the chemical evolution of the rest of the cloud. As a part of a full spectral survey towards Orion KL (the closest massive star-forming region) taken with the IRAM-30m telescope, we present a molecular line study of 32S16O, 32S16O_2 and their 34S, 33S, 18O and 17O isotopologues. Around ∼20 and ∼100 pure rotational lines of SO and SO_2 respectively, including lines from vibrationally excited states, have been detected. In addition, ∼2'×2' maps of the region have been taken with HERA multi-beam array. In order to understand the chemical evolution of SO and SO_2 in the region, we have simulated the time-evolution of the different known components in Orion KL (hot core, plateau, compact ridge and extended ridge). Predicted chemical abundances are compared with the column densities inferred from observations.
Cernicharo Jose
Esplugues G. B.
Goicoechea Javier R.
Marcelino Nuria
Tercero Belen
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