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| Paper: |
Confirming the binary nature of PG 1544+488 with FUSE |
| Volume: |
348, Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE |
| Page: |
203 |
| Authors: |
Ahmad, A.; Jeffery, C.S.; Fullerton, A.W. |
| Abstract: |
Helium-rich subdwarf B (He-sdB) stars form a very small fraction of the population of hot subdwarf stars in our Galaxy. We present our serendipitous discovery that the prototype – PG 1544+488 – is a binary containing two low-mass helium-rich hot subdwarfs. The discovery was confirmed by a re-analysis of archival FUSE observations of PG 1544+488. We also discuss the contradiction between FUSE and optical measurements of He-sdB surface gravities. The implications of these observations for the evolutionary status of He-sdB stars are also explored. |
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