Statistics – Computation
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21813403s&link_type=abstract
American Astronomical Society, AAS Meeting #218, #134.03; Bulletin of the American Astronomical Society, Vol. 43, 2011
Statistics
Computation
Scientific paper
Molecules are primarily destroyed in diffuse and translucent regions, in protoplanetary disks, in cool stellar atmospheres, in photodissociation regions, and in x-ray dominated regions via photodissociation (PD) due to the incident radiation field. The majority of astrochemical/spectral modeling codes available today use pre-computed exponentially-attenuated photorates based on dust scattering/absorption for an ``average" interstellar cloud. Since there is clearly a large scatter in the dust properties and local radiation field for various environments in the Galaxy and beyond, the adoption of such pre-computed photorates can lead to considerable errors in predicted abundances. To improve current modeling capabilities, we are computing new rovibrationally-resolved PD cross sections for H_2, HD, HeH+, NH, C_2, CN, and CS and implementing the cross sections in the spectral simulation code Cloudy for explicit computation of local photorates. We present model results using the new photodissociation cross sections for a variety of environments emphasizing differences in total and state-specific molecular column densities.
This work was partially supported by NASA grants NNG06GJ11G and HST-AR-11776.01-A, NSF grant AST-0607733, and the PRODEX Programme of ESA.
Abel Nicholas
Cieszewski R. M.
el-Qadi W.
Ferland Gary J.
Gay C. D.
No associations
LandOfFree
Accurate Photodissociation in UV and X-ray Irradiated Molecular Gas 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 Accurate Photodissociation in UV and X-ray Irradiated Molecular Gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Accurate Photodissociation in UV and X-ray Irradiated Molecular Gas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1738810