Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996pasj...48l..65y&link_type=abstract
Publications of the Astronomical Society of Japan, v.48, p.L65-L69.
Astronomy and Astrophysics
Astronomy
11
Infrared: Sources, Infrared: Spectra, Interstellar: Dust, Spacecraft, Stars: Late-Type, Stars: Mass Loss
Scientific paper
The mid-infrared spectrometer on board Infrared Telescope in Space has detected thousands of point-like sources in the spectral range of 4.5--11.7 mu m. Extraction of point sources from the survey data has been carried out for the observing period after the spin-flip, where accurate pointing information is presently available, and 129 point sources have been extracted with signal-to-noise ratios greater than 3 throughout the MIRS spectral range. A two-color diagram of these objects, derived from bands of 5 mu m, 8 mu m, and 10 mu m of the sources, is presented. The sources can be classified into five groups on the diagram: visible late-type stars, stars with dust envelopes, stars with silicate emission, objects with the unidentified infrared (UIR) emission bands, and very peculiar red objects. With the help of the 5 mu m and 8 mu m colors, objects with the UIR bands can clearly be distinguished from objects without those features. The characteristics of the sources in each group are discussed based on the spectra.
Onaka Takashi
Roellig Thomas L.
Tanabé Toshihiko
Yamamura Issei
Yuen Lunming
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