Journal ArticleDOI
Far Infrared and Submillimeter Emission from Galactic and Extragalactic Photo-Dissociation Regions
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In this article, the effects of metallicity and cloud extinction on the predicted line intensities were examined for PDR models with densities over the range n=10^1-10^7 cm^-3.Abstract:
Photodissociation Region (PDR) models are computed over a wide range of physical conditions, from those appropriate to giant molecular clouds illuminated by the interstellar radiation field to the conditions experienced by circumstellar disks very close to hot massive stars. These models use the most up-to-date values of atomic and molecular data, the most current chemical rate coefficients, and the newest grain photoelectric heating rates which include treatments of small grains and large molecules. In addition, we examine the effects of metallicity and cloud extinction on the predicted line intensities. Results are presented for PDR models with densities over the range n=10^1-10^7 cm^-3 and for incident far-ultraviolet radiation fields over the range G_0=10^-0.5-10^6.5, for metallicities Z=1 and 0.1 times the local Galactic value, and for a range of PDR cloud sizes. We present line strength and/or line ratio plots for a variety of useful PDR diagnostics: [C II] 158 micron, [O I] 63 and 145 micron, [C I] 370 and 609 micron, CO J=1-0, J=2-1, J=3-2, J=6-5 and J=15-14, as well as the strength of the far-infrared continuum. These plots will be useful for the interpretation of Galactic and extragalactic far infrared and submillimeter spectra observable with ISO, SOFIA, SWAS, FIRST and other orbital and suborbital platforms. As examples, we apply our results to ISO and ground based observations of M82, NGC 278, and the Large Magellenic Cloud.read more
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Velocity resolved [CII], [CI], and CO observations of the N159 star-forming region in the Large Magellanic Cloud: a complex velocity structure and variation of the column densities
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CI and CO in the center of M 51
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torus-3dpdr: a self-consistent code treating three-dimensional photoionization and photodissociation regions
Thomas G. Bisbas,Thomas J. Haworth,Thomas J. Haworth,M. J. Barlow,Serena Viti,Tim J. Harries,T. A. Bell,Jeremy Yates +7 more
TL;DR: Torus-3DPDR as mentioned in this paper is a self-consistent code for treating the chemistry of three-dimensional photoionization and photodissociation regions, which is an integrated code coupling the two codes TORUS, a hydrodynamics and Monte Carlo radiation transport code, and 3D-PDR, a PDRs code.
Journal ArticleDOI
Probing the interstellar medium in early-type galaxies with Infrared Space Oberservatory observations
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Journal ArticleDOI
Multidimensional chemical modeling of young stellar objects. iii. the influence of geometry on the abundance and excitation of diatomic hydrides
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