Testing HCN/HCO+ chemistry and excitation in the Galactic starburst template W49A

Details Testing HCN/HCO+ chemistry and excitation in the Galactic starburst template W49A Testing HCN/HCO+ chemistry and excitation in the Galactic starburst template W49A

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007msl..confe..34p&link_type=abstract

"Molecules in Space and Laboratory, meeting held in Paris, France, May 14-18, 2007. Editors: J.L. Lemaire, F. Combes. ISBN: 9782

Astronomy and Astrophysics

Astrophysics

Observations

Scientific paper

The last years have seen a wealth of new molecular line data towards starbursts in the early and local Universe, especially from high density tracers like HCN and HCO+. Given the difficulties in the interpretation of the data, we started a project with the IRAM 30m telescope to study the chemistry and excitation of HCN/HCO+ toward the famous Galactic starburst template W49A. We probed W49A with the lower molecular rotational transitions of 13CO, C18O, HCN, HCO+. Our preliminary results showed that HCN/HCO+ ratios are generally below unity, which is a characteristic of X-ray dominated regions (XDRs) (Meijerink et al. 2005, 2007).

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