8 to 13 micrometer spectrophotometry of compact sources in W3

Astronomy and Astrophysics – Astronomy

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Infrared Astronomy, Infrared Spectrophotometers, Nebulae, Radio Sources (Astronomy), Spectrum Analysis, Astronomical Models, Emission Spectra, Error Analysis, Luminous Intensity, Optical Thickness

Scientific paper

Three infrared and radio sources in W3 (continuum) and one in W3(OH) have been observed with 1% spectral resolution. Three sources show deep silicate absorption features; the remaining source shows little silicate absorption and has three emission lines. One source, IRS 5, has the deepest silicate absorption known and can be used to determine the wavelength dependence of silicate extinction. Such properties of the sources as dust masses and luminosities are discussed.

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