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- W4241972013 abstract "Near-infrared spectroscopy of a sample of 21 substellar objects in the Orion Trapezium cluster, with masses in the range 0.008-0.10 M $_odot$ is presented. Most of the targets are located away from the region of brightest nebulosity and have photometric colours that indicate low extinction (A(v) < 5 mag). All but one, of the low-mass candidates display deep water vapour absorption bands, confirming the low effective temperatures indicated by the (I-J) colours. Interestingly, the profiles of the water bands near 1.6 microns are quite distinct from those of field brown dwarf stars, providing convincing evidence that the Trapezium objects are not foreground or background objects. Furthermore, the 2.3 micron CO absorption bands and the 2.21 micron [NaI] absorption line are significantly weaker than field brown dwarfs with similar water absorption band depths. These spectral characteristics are quite well reproduced by the low surface gravity Ames-Dusty models of Allard et al, providing additional evidence that the Trapezium substellar candidates are young and recently- formed." @default.
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- W4241972013 date "2006-02-10" @default.
- W4241972013 modified "2023-10-16" @default.
- W4241972013 title "Infrared Spectroscopy of Sub-Stellar Objects in Orion" @default.
- W4241972013 doi "https://doi.org/10.1007/10856518_25" @default.
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