Bibcode
Lazaro, C.
Bibliographical reference
In ESA, Infrared Spectroscopy in Astronomy p 367-369 (SEE N90-19084 11-89)
Advertised on:
9
1989
Citations
0
Refereed citations
0
Description
The results of medium resolution (R=600) spectrophotometry of 15 bright
carbon stars of class N, obtained in the range of lambda:1 to 4.2
microns, are presented. Data is complemented by wide band photometry in
JHKLM for a bigger sample. The selected sample of stars does not show
evidence of massive circumstellar dust envelopes. The infrared flux is
expected to arise from a little disturbed photosphere. The observed flux
distributions are compared with those predicted by model atmospheres.
The presence, or not, of polyatomic molecules is taken into account. The
effective temperatures of the stars is calculated. Important differences
arise between the observed spectra and the predictions of models. Their
validity, and the possible origins of the disagreement, are discussed.