AKARI-IRC observations of heavily obscured oxygen-rich AGB and post-AGB stars - Astrophysics > Solar and Stellar AstrophysicsReportar como inadecuado




AKARI-IRC observations of heavily obscured oxygen-rich AGB and post-AGB stars - Astrophysics > Solar and Stellar Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We present AKARI-IRC observations of a sample of six extremely red IRASsources, of which three are variable OH-IR stars and the rest are earlypost-AGB stars. The OH-IR stars show a red continuum with the expected strong10 micron silicate absorption feature, while the post-AGB stars show an evenredder continuum accompanied with a comparably weak silicate absorption. Wemodelled the spectral energy distributions with DUSTY. While for the OH-IRstars a reasonable fit can be obtained with almost pure silicate dust, thepost-AGB stars require a mixture of silicate and carbon-rich dust. We assumethat in the latter objects the inner dust shell is carbon-rich, while the outershells are still oxygen-rich.



Autor: F. Bunzel, D.A. García-Hernández, D. Engels, J.V. Perea-Calderón, P. García-Lario

Fuente: https://arxiv.org/



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