Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.6016h&link_type=abstract
HST Proposal ID #6016
Astronomy and Astrophysics
Astrophysics
Hst Proposal Id #6016 Interstellar Medium
Scientific paper
We propose to obtain FOS spectra of the HH 47 protostellar jet to (1) investigate how entrainment exchanges mass between collimated outflows and the surrounding medium and (2) separate the line emission of the Mach disk from that of the bow shock for the first time in the hotspot of a jet. Our proposed spectra will target emission line structures resolved in our Cycle 4 WFPC images. HH 47 is optimal for study of entrainment and hotspot formation, processes common to most astrophysical flows, because this jet is well-resolved spatially, originates from a single, isolated dark globule with a relatively simple geometry, and the shocks in the flow are all radiative. The proposed observations will provide the fundamental data needed to model both the energy transfer occurring in entrained astrophysical flows, and the formation of shocks in hotspots. Only HST observations achieve the spatial resolution necessary to clearly resolve the entrained material and to separate the Mach disk emission from that of the bow shock in the hotspot.
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