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Disks around Hot Stars in the Trifid Nebula

B. Lefloch·J. Cernicharo·D. Cesarsky·K. Demyk·M. A. Miville-Deschenes·L. F. Rodriguez
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Abstract

We report on mid-IR observations of the central region in the Trifid nebula, carried out with ISOCAM in several broad-band infrared filters and in the low resolution spectroscopic mode provided by the circular variable filter. Analysis of the emission indicates the presence of a hot dust component (500 to 1000 K) and a warm dust component at lower temperatures (150-200 K) around several members of the cluster exciting the HII region, and other stars undetected at optical wavelengths. Complementary VLA observations suggest that the mid-IR emission could arise from a dust cocoon or a circumstellar disk, evaporated under the ionization of the central source and the exciting star of the nebula. In several sources the $9.7μm$ silicate band is seen in emission. One young stellar source shows indications of crystalline silicates in the circumstellar dust.

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B. Lefloch, J. Cernicharo, D. Cesarsky, K. Demyk, M. A. Miville-Deschenes, L. F. Rodriguez. 2001-01-25. Disks around Hot Stars in the Trifid Nebula. https://doi.org/10.1051/0004-6361%3A20010209

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