| |
 |
| Paper: |
The MIR Dust Features of Vega-like Stars: A Comparison With Cometary Spectra |
| Volume: |
294, Scientific Frontiers in Research on Extrasolar Planets |
| Page: |
235 |
| Authors: |
Butner, H. M.; Wooden, D. H.; Harker, D. E.; Woodward, C. E. |
| Abstract: |
Vega-like stars, which are main-sequence (or approaching the main sequence), have substantial debris disks around them. We observed 8-13 micron spectra towards several Vega-like stars. We present models that fit the mid-infrared spectra of the Vega-like stars using the SAME silicate minerals used to fit Comet Hale-Bopp (Wooden et al. 1999). We find that the Hale-Bopp mixture, which contains Mg-rich pyroxene grains - a possible signature of pristine material, fits our Vega-like 8-13 micron spectra extremely well. Models of HD 144432 indicate that pyroxene's Mg-richness might be a sensitive parameter when fitting 8-13 micron spectra. |
|
|
|
|
|
