| |
 |
| Paper: |
The Chemical Composition of Helium-rich sdB Stars |
| Volume: |
452, Fifth Meeting on Hot Subdwarf Stars and Related Objects |
| Page: |
65 |
| Authors: |
Naslim, N.; Jeffery, C. S.; Behara, N. T. |
| Abstract: |
We present abundance analyses of He-sdB stars using high
resolution optical spectra obtained with AAT/UCLES. Our aim is to
explore the connection between He-sdB stars, He-sdO stars and
normal sdB stars. Opacity-sampled line-blanketed model atmospheres
have been used to derive atmospheric properties and elemental
abundances. Our studies clearly distinguish intermediate He-sdB stars
from extreme He-sdB stars. Intermediate He-sdB stars mostly exhibit
strong unusual elemental abundances. The most likely explanation for
this abundance anomaly is radiatively-driven diffusion in the photosphere. |
|
|
|
|
|
