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- W2009278316 abstract "We present new mid-infrared observations of objects in the vicinity of the O-star σ Orionis, obtained with TIMMI-2 at ESO. By constraining their near- and mid-infrared spectral energy distributions, we established the nature of previously known IRAS sources and identified new mid-infrared sources as young stellar objects with circumstellar disks, likely massive members of the σ Ori cluster. For two of these objects we have obtained spectroscopy in the 8–13 μm range in order to investigate the chemistry of the dust grains. TX Ori exhibits a typical silicate emission feature at 10 μm, with a feature at about 11.2 μm that we identify as due to crystalline olivine. The IRAS 05358-0238 spectrum is very unusual, with a weak silicate feature and structure in the range 10–12 μm that may be explained as due to self-absorbed forsterite. We also provide the first evidence for the presence of circumstellar disks in the jet sources Haro 5-39/HH 447, V510 Ori/HH 444 and V603 Ori/HH 445." @default.
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- W2009278316 date "2004-04-09" @default.
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- W2009278316 title "Mid-infrared observations of young stellar objects in the vicinity of $mathsf{sigma}$ Orionis" @default.
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- W2009278316 doi "https://doi.org/10.1051/0004-6361:20034518" @default.
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