| Description |
We propose to perform FIR spectroscopy of the warm and dense ISM
(WADI) using the unique observational opportunities of Herschel to
improve our understanding of the physical and chemical processes
controlling the interaction between stars and their environment.
The program will focus on four core topics,
energy balance of photon-dominated regions (PDRs),
photo-induced chemistry,
PDR dynamics and kinematics,
shock structures.
Both radiative (FUV) and dynamical (shocks) processes will be probed,
as key factors in the evolution of the ISM. They regulate star
formation and may even govern galaxy evolution on large scales. Most
of the energy input in star-forming regions is released as FIR
radiation, either as dust continuum or as gas cooling lines. The bright
cooling lines from these regions are natural tracers of star formation
activity throughout the history of the cosmos; detailed understanding
of their origin thus provides the basis for proper interpretation of
the observations both of the Milky Way, as well as of nearby and
distant galaxies.
Herschel.s unprecedented spectral coverage at high spatial resolution
combined with the spectral resolution of the HIFI instrument allows a
detailed study of many key tracers of PDRs and shocks. This allows to
deeply probe the interaction of stars with their surrounding through
radiation (PDRs) and shocks (SNRs). Observing a proper selection of
prototype sources and key lines, will give insight into the details of
the physical and chemical processes controlling each of the four core
topics above, and will thus allow to model the FIR emission of star
forming regions. |
| Instrument |
HIFI_HifiPoint_fs, HIFI_HifiPoint_load, HIFI_HifiPoint_pos, PACS_PacsRangeSpec_point, PACS_PacsLineSpec_point, HIFI_HifiPoint_dbs, HIFI_HifiMapping_load-raster, HIFI_HifiMapping_fly, PACS_PacsLineSpec_large |
