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Title: THE IDENTIFICATION OF PROBABLE SiS EMISSION AT 13-14 mu m IN SPECTRA OF GALACTIC S STARS
Authors: Sloan, G. C ×
Hony, S
Smolders, Kristof
Decin, Leen
Zijlstra, A. A
Feast, M. W
van Wyk, F
van Loon, J. Th
Groenewegen, M. A. T
Sahai, R #
Issue Date: Mar-2011
Publisher: University of Chicago Press for the American Astronomical Society
Series Title: Astrophysical Journal vol:729 issue:2 pages:-
Article number: 121
Abstract: A sample of 90 Galactic S stars observed by the Spitzer Space Telescope includes two sources with unusual low-contrast spectral structure between 7 and 14 mu m. The most likely estimate of the spectral continuum leads to the identification of molecular emission features from SiS at 7 and 13-14 mu m. The spectra also show what is best described as featureless excess emission, most likely from iron dust but possibly from amorphous carbon, as well as an emission feature from amorphous alumina dust peaking at 11-12 mu m. The spectra show long-wavelength excesses from cool dust grains in an extended envelope and additional emission features of unknown origin.
ISSN: 0004-637X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Institute of Astronomy
× corresponding author
# (joint) last author

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