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| Paper: |
The Heavy Element Abundance Pattern in Hot, Hydrogen-Rich Subdwarfs as Revealed by FUSE |
| Volume: |
348, Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE |
| Page: |
224 |
| Authors: |
Fontaine, M.; Chayer, P.; Wesemael, F.; Lamontagne, R.; Blanchette, J.-P.; Fontaine, G. |
| Abstract: |
FUSE observations of a sample of six hot, hydrogen-rich subdwarf (sdB) stars have allowed us to determine the abundances of C, N, Si, P, S, Cl, V, Mn, Cr, Fe, Co, and Ni in the photospheres of these objects. The main objective of this program is to map in a more detailed way than has been done in the past the pattern of heavy element abundances in sdB stars in order to understand the competing roles of gravitational settling, radiative element support, and mass loss in their atmospheres. This may pave the way toward an understanding of why some sdB stars pulsate, while others with similar atmospheric parameters do not. We compare the results of our abundance determinations with current predictions of the parameter-free version of the radiative levitation theory. |
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