Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.146d&link_type=abstract
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole
Astronomy and Astrophysics
Astronomy
Scientific paper
Hot cores are key targets for present day research in Astronomy because of both their extreme chemical richness and their role in the process of high-mass star formation. Several papers have dealt with the Ultra Compact HII region W31C, also known as G10.62-0.39, in the last few years, revealing a complex source presenting evidences for infalling material from the molecular envelope, multiple outflowing activity from high-mass protostars, methanol masers and a rotating dense toroid. Herschel-HIFI high resolution (1.1 MHz) sub-millimeter spectra have been taken in the framework of the PRISMAS Herschel key programme, aiming at the absorption features of hydride molecules due to foreground diffuse clouds. These data contain also precious information on the W31C massive core itself because of the abundance of emission lines arising from all the environments characterizing the region, from the compact hot core to the surrounding molecular cloud, with clear signatures of outflowing activity. We will present preliminary results of our attempt of modeling the HIFI spectra, in combination with IRAM-30m data, in both LTE and non-LTE approximations, with particular focus on key molecular species like methanol, formaldehyde, CO, CS, SO, SO2 and CN-bearing molecules (and isotopologues). We will also discuss the compatibility of our results with previous studies of the same region.
Bell Thomas A.
Coutens Audrey
de Luca Massimo
Gerin Maryvonne
Gupta Harish
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