Near-Infrared Spectroscopy of Photodissociation Regions: The Orion Bar and Orion S
arXiv:astro-ph/9801009 · doi:10.1086/305682
Abstract
To test the PDR model spectra under the physical conditions present in Orion, we have obtained moderate-resolution (R=3000) J-, H-, and K-band long-slit spectra of the Orion bar and Orion S regions These observations provide conclusive evidence for the PDR origin (rather than shocks) of the H_2 emission in each of these regions and demonstrate significant departures in the observed chemical structure from that predicted by models of homogeneous PDRs.
Accepted to Astrophysical Journal