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
Testing Models of Low-Excitation Photodissociation Regions with Far-Infrared Observations of Reflection Nebulae
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Journal ArticleDOI
Kiloparsec view of a typical star-forming galaxy when the Universe was ∼1 Gyr old - I. Properties of outflow, halo, and interstellar medium
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TL;DR: In this article, the Atacama Large Millimeter/Submillimeter Array observations of the [C´II] 158 μm transition and the dust continuum in HZ4, a typical star-forming galaxy when the Universe was only ∼ 1 Gyr old (z ´∼´5.5).
Journal ArticleDOI
Infrared Space Observatory Spectroscopy of HH 7-11 Flow and Its Redshifted Counterpart*
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TL;DR: In this article, the authors used the two spectrometers on the Infrared Space Observatory to observe the HH 7¨11, its redshifted counterpart, and the candidate exciting source SVS 13 in the star formation region NGC 1333.