| Description |
We propose to investigate the physical, chemical and dynamical
properties of a sample of newly found high-mass pre- and proto-stellar
cores identified by the ..Herschel infrared GALactic Plane Survey.
(Hi-GAL; Molinari et al. 2010). We will perform
observations of the o-NH3(1_0-0_0) line (and, simultaneously, also of
the o-H2O(1_10-1_01) transition) that will
allow us to identify both similarities and differences between the
physical and chemical conditions before and after the formation of a
warm/hot source inside the dusty core identified in the SPIRE/PACS maps.
Hence, these observations will improve our knowledge of the earliest
phases in the evolution of high-mass stars. We will also attempt the
detection of the NH(1-0) line towards a smaller sample of
sources, in order to improve our knowledge of the N-chemistry
during early high-mass star formation. |
