Understanding Extreme Carbon Stars: Condensation Temperature, Grain Sizes, and Silicon Carbide Absorption

Details Understanding Extreme Carbon Stars: Condensation Temperature, Grain Sizes, and Silicon Carbide Absorption Understanding Extreme Carbon Stars: Condensation Temperature, Grain Sizes, and Silicon Carbide Absorption

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.9308c&link_type=abstract

American Astronomical Society, AAS Meeting #211, #93.08; Bulletin of the American Astronomical Society, Vol. 39, p.890

Astronomy and Astrophysics

Astronomy

Scientific paper

Infrared carbon stars without visible counterparts are generally known as extreme carbon stars. A subset of these stars are known to exhibit absorption features in the 10-12 micron range. We present the results of modeling 10 extreme carbon stars, observed spectroscopically by the ISO SWS, using the 1-D radiative transfer program DUSTY. Using theoretical models of both dust condensation and evolution, we were able to limit the required parameter space in addition to determining that we should expect a high condensation temperature ( 1800K) and graphitic rather than amorphous grains. Seven of these stars had been previously investigated, but we expanded this research by looking at a wider range of parameters, including the grain size distribution, optical depth, shell thickness, and dust composition. The remaining three sources have had the 11 micron absorption feature newly identified by this research. Our models are consistent with the IR emission being only due to the superwind phase, and not significantly influenced by the earlier, lower, mass loss episodes.

Affiliated with

Also associated with

No associations

Rating

Understanding Extreme Carbon Stars: Condensation Temperature, Grain Sizes, and Silicon Carbide Absorption does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Understanding Extreme Carbon Stars: Condensation Temperature, Grain Sizes, and Silicon Carbide Absorption, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Understanding Extreme Carbon Stars: Condensation Temperature, Grain Sizes, and Silicon Carbide Absorption will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1479720