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26 April 2024 |
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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
; | | Date: |
24 Dec 2000 | | Subject: | astro-ph | | Affiliation: | LAOG, Grenoble France, IEM, CSIC, Madrid, Spain, MPIfEP, Garching, Germany IAS, Orsay, France ENS, LRA, Paris, France Instituto de Astronomia, UNAM, Morelia, Mexico | | 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 $9.7mu m$ silicate band is seen in emission. One young stellar source shows indications of crystalline silicates in the circumstellar dust. | | Source: | arXiv, astro-ph/0101435 | | Services: | Forum | Review | PDF | Favorites | |
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