The CHESS survey of the protostellar shock L1157-B1

Outflows generated by protostars heavily affect the kinematics
and chemistry of the hosting molecular cloud due to strong shocks. These
shocks heat and compress the ambient dense gas switching on a complex
chemistry that leads to an enhancement of the abundance of several
species, as reported in "chemically active" outflows, whose archetype is
the outflow of the low-mass Class 0 protostar L1157.
I'll present the results of the spectral survey of the shock region
L1157-B1 carried out with PACS, SPIRE, and HIFI instruments on board
Herschel in the framework of Herschel key program CHESS. The high spectral
resolution data from HIFI show that different excitation conditions
coexist in the B1 shock while the high spatial resolution of PACS data
shows a different spatial distribution of the the detected species. We
will discuss the properties of the different gas components and present
the physical conditions derived from different species. We will present a
first comparison with shock models highlighting the complex structure of
this shocked region.
30/01/2014 - 13:30
Dr. Gemma Busquet