An alternative mechanism for production of emission features in some infrared objects

Astronomy and Astrophysics – Astronomy

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Cosmic Dust, Emission Spectra, Infrared Stars, Stellar Envelopes, Supergiant Stars, Astronomical Models, Infrared Astronomy, Stellar Radiation

Scientific paper

Two dust-envelope models of the M supergiant VX Sgr, which exhibits a prominent emission feature at 10 microns, are presented. The models indicate that, for certain envelope sizes, the presence of the observed emission feature does not necessarily indicate that the emitting grains possess a similar feature in their emissivity profile. The mechanism which may in some cases be producing the observed emission feature is discussed.

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