Investigating The Effect Of The C/O Ratio On Dust Formation Around Carbon Stars

Details Investigating The Effect Of The C/O Ratio On Dust Formation Around Carbon Stars Investigating The Effect Of The C/O Ratio On Dust Formation Around Carbon Stars

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...212.0601c&link_type=abstract

American Astronomical Society, AAS Meeting #212, #6.01; Bulletin of the American Astronomical Society, Vol. 40, p.195

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There have been several investigations of the mid-infrared spectra in carbon stars, primarily concentrating on emission and absorption features due to silicon carbide(SiC). Recently it was shown that there are no correlations between the strength,shape or position of the 11 micron SiC feature and the underlying continuum temperature. Consequently, we seek other parameters that control the nature of the dust-forming shells. To this end, we investigate the effect of the C/O ratio on the observed spectra of carbon stars. We have selected 10 sources with known C/O ratios observed spectroscopically by the ISO SWS. These sources all show SiC emission features and are optically thin. To determine the parameters of the dust shells, we have performed radiative transfer modeling using DUSTY. Preliminary results will be presented.

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