SPITZER IRS SPECTRA OF LUMINOUS 8 mu m SOURCES IN THE LARGE MAGELLANIC CLOUD: TESTING COLOR-BASED CLASSIFICATIONS
Catherine L Buchanan, Joel H Kastner, Bruce J Hrivnak, Raghvendra Sahai
ASTRONOMICAL JOURNAL | IOP PUBLISHING LTD | Published : 2009
We present archival Spitzer Infrared Spectrograph (IRS) spectra of 19 luminous 8 μm selected sources in the Large Magellanic Cloud (LMC). The object classes derived from these spectra and from an additional 24 spectra in the literature are compared with classifications based on Two Micron All Sky Survey (2MASS)/MSX (J, H, K, and 8 μm) colors in order to test the "JHK8" (Kastner et al.) classification scheme. The IRS spectra confirm the classifications of 22 of the 31 sources that can be classified under the JHK8 system. The spectroscopic classification of 12 objects that were unclassifiable in the JHK8 scheme allow us to characterize regions of the color-color diagrams that previously lacked..View full abstract
This work is based on data from the Spitzer Space Telescope and has made use of the NASA/IPAC Infrared Science Archive, which are both operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France. We thank the anonymous referee for considered comments which improved this manuscript.