The development of the 8-13 micron spectrum of Nova Aquilae 1982

Astronomy and Astrophysics – Astronomy

Scientific paper

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Cosmic Dust, Emission Spectra, Infrared Astronomy, Novae, Spectrum Analysis, Stellar Spectrophotometry, Continuous Spectra, Silicates, Spectral Energy Distribution

Scientific paper

Four 8 - 13 μm spectra of the dust emission from Nova Aquilae 1982 are presented. The data, obtained between 140 and 280 days after outburst, show a prominent silicate emission feature superposed on a smooth warm continuum. The presence of the silicate grain signature, which is similar to laboratory emissivity curves of amorphous olivine smoke, indicates that these grains originated in an oxygen-rich environment where graphite or other carbon-rich grains are unlikely to have formed.

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