Spitzer Space Telescope - General Observer Proposal #50808


IRS investigation of 24 micron compact ring sources

Principal Investigator: Sean Carey
           Institution: SSC

     Technical Contact: Sean Carey, SSC

Co-Investigators: 
Alberto Noriega-Crespo, Spitzer Science Center                        
Sachin Shenoy, Spitzer Science Center                                 
Roberta Paladini, Spitzer Science Center                              
Schuyler VanDyk, Spitzer Science Center                               
Patrick Morris, NHSC/IPAC                                             

Science Category: evolved stars/pn/sne 
 Observing Modes: IrsStare 
  Hours Approved: 3.7 

Abstract:
We propose IRS observations of seven compact ring and bubble like sources
identified in the MIPSGAL Legacy survey images. These sources were previously
unknown and are representative of > 100 compact sources in the MIPSGAL survey
data. The spectra will be used to determine whether these objects are lower mass
evolved stars, massive evolved stars or supernova remnants similar to the one
found by Morris et al. (2006). This inquiry is highly speculative as we have
little information regarding these objects, but Spitzer is the only observatory
that can further ascertain their physical properties.