Astronomy and Astrophysics – Astrophysics
Scientific paper
2005-09-15
Astrophys.J.638:472-477,2006
Astronomy and Astrophysics
Astrophysics
Accepted by ApJ 14 September, 2005, 6 pages (emulateapj), 6 figures
Scientific paper
10.1086/498076
The spectrum of HV 2310, an evolved star in the Large Magellanic Cloud, taken with the Infrared Spectrograph (IRS) on the Spitzer Space Telescope reveals the presence of an optically thin shell of silicate dust with unusual spectral structure in the 10 um feature, with an emission peak at 9.7 um, a saddle at 10.4 um, and an extended shoulder to 11.2 um. This structure is similar to spectra from crystalline silicate grains, and of the available optical constants, forsterite provides the best fit. The spectrum also shows structure at 14 um which may arise from an unidentified dust feature.
Bernard-Salas Jeronimo
Devost Daniel
Houck James R.
Sloan Greg C.
Wood Peter R.
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