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- W1993207029 abstract "Observations of the far-infrared fine-structure emission lines of [O I] (63, 146 μm), [C II] (158 μm), and [Si II] (35 μm) and the adjacent continua were obtained for the reflection nebula NGC 2023 with the Cryogenic Grating Spectrometer aboard the Kuiper Airborne Observatory. These fine-structure lines originate from a warm, atomic photodissociation region (PDR), where gas has been heated by the illuminating star HD 37903. The measured line and continuum intensities were combined with [C II] and CO observations from the literature to estimate the density and temperature of the PDR. Simple analysis indicates densities of ~2 × 104 cm-3 and temperatures around 400 K for the emitting gas." @default.
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- W1993207029 date "1997-03-20" @default.
- W1993207029 modified "2023-09-23" @default.
- W1993207029 title "Physical Conditions in the Photodissociation Region of NGC 2023" @default.
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- W1993207029 doi "https://doi.org/10.1086/303759" @default.
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