Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.372v&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
High spectral resolution molecular observations, especially with HIFI, have revelead intriguing differences among the line profiles of several shock tracers. I will present recent results from a chemical and shock model coupled with a radiative transfer model that attempt to explain such differences for the case of L1157-B1. This object is the brighest blue-shifted bow-shock associated with the L1157-mm class 0 protostar; its rich chemical and clumpy structure has been intensively studied from the ground as well as with Herschel. The latter has revealed the presence of different but co-existing molecular components at different excitation conditions (Codella et al. 2010, Lefloch et al. 2010). Of particular interest, is the comparison of the NH_3(1_0-0_0) profile with that of the H_2O(101-101) at high velocities. The model is used to investigate the origin of the different molecular profiles and in this presentation I will show how water is a unique tracer of low velocity shocks.
Caselli Paola
Ceccarelli Cecilia
Codella Claudio
Jiménez-Serra Izaskun
Lefloch Bertrand
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