The ISO-SWS flux standard stars: synthetic spectra and observations
نویسندگان
چکیده
منابع مشابه
Infrared spectra of carbon stars observed by the ISO SWS ?
We analyzed the mid-infrared spectra of 4 optical carbon stars and 4 candidates of infrared carbon stars obtained with the ISO SWS. It has been revealed that special care should be taken in determining the continuum levels for the analysis of the emission and absorption bands of HCN and C2H2 at 14 μm; otherwise the SiC emission at 11 μm as well as molecular absorption at 7.5 μm may lead to the ...
متن کاملInfrared spectra of carbon stars observed by the ISO SWS I. Molecular absorption in N-type and SC-type stars
We carried out observations of bright optical carbon stars by the ISO SWS, and detected the absorption features of CO, CS, CH, SiS and HCN in N-type and SC-type stars. We found several characteristics of molecular absorption features corresponding to the spectral types. The CH fundamental bands in 3-4 μm in N-type stars are stronger than those in SC-type stars. On the other hand, the first over...
متن کاملThe ISO-SWS spectra of Luminous Blue Variables
We present the infrared spectra between 2.4 and 45 m of two Luminous Blue Variables (AG Car, HR Car) observed with the Short Wavelength Spectrometer of ISO. The spectra consist of two parts: (1) the tail of the photospheric energy distribution with the free-free excess from the lower layers of the stellar wind, (2) emission from circumstellar dust. The free-free emission can be explained by mod...
متن کاملA study of ISO-SWS spectra of oxygen-rich AGB stars
We have derived a mean profile of the 13 μm emission feature from 11 ISO spectra of oxygen-rich AGB stars and present an overview of the mineral species that could account for it. Our results can be summarized as follows: i) Spherical particles of α-Al2O3 (corundum) have a sharp emissivity maximum peaking at 12.7 μm. The difference of 0.3 μm in the peak position compared to the mean observed ba...
متن کاملISO-SWS spectra of galaxies: Continuum and features
We present an inventory of mid-infrared spectral features detected in high resolution (R∼1500) ISO-SWS 2.4–45μm spectra of the galaxies M 82, NGC 253, Circinus, NGC 1068, and a position in the 30 Doradus region of the Large Magellanic Cloud. We discuss their identifications and highlight possible relations between these features and the physical state of the interstellar medium in galaxies. The...
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ژورنال
عنوان ژورنال: Symposium - International Astronomical Union
سال: 1997
ISSN: 0074-1809
DOI: 10.1017/s0074180900116547