[O I] and [C II] Emission Towards NGC 6334 A

Details [O I] and [C II] Emission Towards NGC 6334 A [O I] and [C II] Emission Towards NGC 6334 A

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.1710a&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #17.10; Bulletin of the American Astronomical Society, V

Mathematics

Metric Geometry

Scientific paper

This work attempts to explain [O I] and [C II] emission towards NGC 6334 A, an obscured ultra-compact H+ region located 1.7 kpc away. Towards NGC 6334 A, the [O I] 63/146 micron ratio is surprisingly low ( 2.4). We find a closed geometry, where the H+ region and associated PDR is embedded in the molecular cloud is required to explain the observed emission. Using such a geometry, constant density PDR calculations were constructed to predict line intensities as a function of AV (or N(H)), hydrogen density (nH), and incident UV radiation field (G0). We find that a single component model with AV 650 mag, nH = 5 ×105 cm-3, and G0 = 7×104 reproduces the observed [O I] and [C II] intensities, and that the low [O I] ratio is due to thermalization of the 63μm line as it propagates through a large column density of atomic/molecular gas. We find that the effects of a density-law increase our derived AV, while the effects of an asymmetric geometry decrease AV, with the two effects largely canceling. Overall, the theoretical calculations presented in this work have utility for any PDR embedded in a molecular cloud.

Affiliated with

Also associated with

No associations

Rating

[O I] and [C II] Emission Towards NGC 6334 A does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with [O I] and [C II] Emission Towards NGC 6334 A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and [O I] and [C II] Emission Towards NGC 6334 A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1155519