High-resolution Spectroscopy of Apparent 14 Micron Features

Details High-resolution Spectroscopy of Apparent 14 Micron Features High-resolution Spectroscopy of Apparent 14 Micron Features

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30345h&link_type=abstract

Spitzer Proposal ID #30345

Computer Science

Scientific paper

The IRS has detected an apparent 14 micron emission feature in the spectra of several silicate dust sources in the Magellanic Clouds. The detections were made using the low-resolution modules, and the feature lies right on the boundary between SL and LL. We have ruled out any known mechanism which could produce a spectral artifact at this wavelength. While the feature is probably real, its detailed structure, which differs among various sources, could be affected by instrumental behaviour. We have chosen three sources showing different structure in the 14 micron region, and we propose to follow these up using the SH module to (1) confirm the existence of the 14 micron feature, (2) quantify its shape, and (3) attempt to identify its carrier. This program will only take 0.8 hours, and in return we will be able to confirm the existence of a previously unidentified dust feature and possibly identify a new dust component as well.

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