2008
DOI: 10.1007/s11433-008-0136-0
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The infrared spectral features of circumstellar envelope of evolved low- and intermediate-mass stars

Abstract: The circumstellar envelope of evolved stars of low-and intermediate-mass is animportant site for dust formation. In comparison with the interstellar medium, they have more types of organics and different types of inorganics. Various infrared features in the circumstellar envelope can reveal the composition and abundance of dust, as well as the chemical and physical conditions of the circumstellar shell. Infrared features and their carriers are different in the C-rich or O-rich environment, and the mixed-enviro… Show more

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Cited by 5 publications
(3 citation statements)
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“…Namely, the optimized sintering temperature for Ag-doped samples was found to be around 900°C [65], almost 50°C higher than the case of the bulks without Ag addition.…”
Section: Thermal Treatmentmentioning
confidence: 88%
See 1 more Smart Citation
“…Namely, the optimized sintering temperature for Ag-doped samples was found to be around 900°C [65], almost 50°C higher than the case of the bulks without Ag addition.…”
Section: Thermal Treatmentmentioning
confidence: 88%
“…Figure19X-ray diffraction patterns of the Ag-doped Sr-122 samples processed at different annealing temperatures[65].…”
mentioning
confidence: 99%
“…Magnesium sulfide (MgS) solids have long been proposed as a candidate carrier Nuth et al 1985;Jiang et al 1999;Szczerba et al 1999;Hony et al 2002Hony et al , 2003Lombaert et al 2012). However, Zhang et al (2009b) recently ruled out MgS as a valid carrier since it would require too much S to account for the observed large amount of power emitted from the 30 µm feature (also see Messenger et al 2013, Otsuka et al 2014 While so far the 21 µm feature appears to be restricted to PPNe, the 30 µm feature is more ubiquitously seen in a large number of carbon-rich objects at various evolutionary stages, including AGB stars, post-AGB stars and PNe (see Jiang et al 2010, Zhang & Jiang 2008. We note that the 30 µm feature is seen in all 21 µm sources, although not all 30 µm sources emit at the 21 µm feature.…”
Section: Introductionmentioning
confidence: 99%