SIMBAD references

We present the first results of the unbiased survey of the L1157-B1 bow shock, obtained with HIFI in the framework of the key program Chemical HErschel Survey of Star forming regions (CHESS). The L1157 outflow is driven by a low-mass Class 0 protostar and is considered the prototype of the so-called chemically active outflows. The bright blue-shifted bow shock B1 is the ideal laboratory for studying the link between the hot (∼1000-2000K) component traced by H₂ IR-emission and the cold (∼10-20K) swept-up material. The main aim is to trace the warm gas chemically enriched by the passage of a shock and to infer the excitation conditions in L1157-B1. A total of 27 lines are identified in the 555-636GHz region, down to an average 3σ level of 30mK. The emission is dominated by CO(5-4) and H₂O(1₁₀-1₀₁) transitions, as discussed by Lefloch et al. (2010A&A...518L.113L) in this volume. Here we report on the identification of lines from NH₃, H₂CO, CH₃OH, CS, HCN, and HCO⁺. The comparison between the profiles produced by molecules released from dust mantles (NH₃, H₂CO, CH₃OH) and that of H₂O is consistent with a scenario in which water is also formed in the gas-phase in high-temperature regions where sputtering or grain-grain collisions are not efficient. The high excitation range of the observed tracers allows us to infer, for the first time for these species, the existence of a warm (≥200K) gas component coexisting in the B1 bow structure with the cold and hot gas detected from ground.