Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009ap%26ss.319...93c&link_type=abstract
Astrophysics and Space Science, Volume 319, Issue 2-4, pp. 93-99
Astronomy and Astrophysics
Astrophysics
1
Stars: Late-Type, Stars: Carbon, Infrared: Stars, Stars: Spectrum
Scientific paper
The spectral variations of three Mira variable carbon stars, V CrB, T Dra and V Cyg in the infrared are investigated based on ISO SWS data. It is found that either continua or molecular/dust features were variable with time in the infrared for these carbon stars during one and a half year observations. When stars were brighter the infrared continuum spectra became blue while stars were fainter the infrared continuum spectra became red. In addition, during spectral variations there were the correlation between the 3.05 μm HCN+C2H2 and the 5.2 μm C3 molecular band strengths and the anti-correlation between the 3.05 μm HCN+C2H2 molecular band strengths and 13.7 μm C2H2 band strengths while during variations the 11.3 μm SiC dust emission strengths were not clearly changed.
Chen Pei-Sheng
Shan Hong-Guang
Yang Xiao-Hong
Zhang Pin
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