NOAO >   Observing Info >   Approved Programs >   2006A-0415

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Proposal Information for 2006A-0415


PI: Bruce J. Hrivnak, Valparaiso University, Bruce.Hrivnak@valpo.edu
Address: Department of Physics and Astronomy, Valparaiso, IN 46383, USA

CoI: Kevin Volk, Gemini Observatory
CoI: Sun Kwok, Inst. of Astronomy & Astrophysics, Taiwan

Title: Spatially-Resolved Spectroscopy of the 21 Micron Emission Feature in Proto-PN

Abstract: We propose to carry out the first spectroscopic study of the spatial distribution of the 21 (micron) emission feature in a proto-planetary nebula (PPN). We have chosen one of the largest, brightest, and best- studied of the 21 (micron) emission sources, IRAS 07134+1005. This feature has been found to be strong in carbon-rich PPNs, where it accounts for ~5% of the total emission in these sources. Although several suggestions have been made, the carrier of this feature is still unknown. Finding the spatial location of this feature will yield information on the conditions (\rho, T) under which it arises and will aid in its identification. We also propose to observe the spatial distribution of the 11.3 (micron) emission feature, which is seen in a variety of carbon-rich evolved objects, to see if the two features are spatially correlated. A specific correlation is predicted in the SiC model.


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NOAO >   Observing Info >   Approved Programs >   2006A-0415

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