Physics
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5976o&link_type=abstract
HST Proposal ID #5976
Physics
Hst Proposal Id #5976 Interstellar Medium
Scientific paper
We propose to make WFPC2 images of both of the centers of known Herbig-Haro objects near the Orion Nebula in the two emission lines most sensitive to delineating their structure. The northern region has multiple Herbig-Haro objects appearing to have a common source, which is located at or near the BN- IRc2 source buried within the Orion Molecular Cloud-1. The southern region is near theta^2 A Ori and seems to lie well in front of the main ionization layer of the nebula. The proposed images should allow us to accurately determine the mechanisms of excitation of these Herbig-Haro objects and their interaction with the ambient nebula and cloud gas. The fact that we have a good basic understanding of the major structure of this region, that there is a concentration of at least 10 Herbig-Haro objects in this area, and there is a good knowledge of the age and distance of the associated stellar cluster makes this the most promising region for the collective study of Herbig-Haro objects. The observations proposed would be in the SII F673N and OI F631N filters and would supplement observations in OIII F502N, HI F656N, and NII F658N already scheduled for the PI's GTO program.
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