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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Journal ArticleDOI
Predictions of the L [C II] -SFR and [CII] Luminosity Function at the Epoch of Reionization
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Book ChapterDOI
CO, 13 CO, and [CI] in Galaxy Centers
TL;DR: In this article, measurements of CO, CO, [CI], [CI, [CII] and far-infrared emission suggest that the dominant excitation mechanism in galaxy centers may be different from that in photon-dominated regions (PDRs).
Journal ArticleDOI
Revisited cold gas content with atomic carbon [C I] in z=2.5 protocluster galaxies
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Journal ArticleDOI
PHANGS–JWST First Results: Stellar-feedback-driven Excitation and Dissociation of Molecular Gas in the Starburst Ring of NGC 1365?
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Journal ArticleDOI
Origin of hydrogen fluoride emission in the Orion Bar: An excellent tracer for CO-dark H2 gas clouds
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