The Physical Conditions in the PDR of W49N

Details The Physical Conditions in the PDR of W49N The Physical Conditions in the PDR of W49N

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.460..511v&link_type=abstract

The Promise of the Herschel Space Observatory. Eds. G.L. Pilbratt, J. Cernicharo, A.M. Heras, T. Prusti, & R. Harris. ESA-SP 460

Other

Ism: Abundances, Ism: Molecules, Ism: Atoms, Hii Regions, Ism: Individual: W49N

Scientific paper

High resolution observations of the [CII] at 158 microns and [OI] 63, 145 microns with ISO-LWS are presented towards the ultracompact HII region W49N. Combined with other observational diagnostics from the literature (CO, far-infrared), theoretical models are constructed to constrain the physical conditions in the W49N photodissociation region. We compared this PDR with others galactic and extragalactic PDRs and found that the observed photo-electric heating efficiency is quite small (1-4 × 10-4). We then proceeded with a detailed model in order to determine the intensity of the cooling lines emitted by the PDR and compared them with observations. The major characteristics of the PDR in W49N is then an incident radiation field of G0 ≈ 3 × 105 Habings and a density nH ≈ 104 cm-3.

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