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D. C. Knauth, B.-G. Andersson, J. Dupuis, H. W. Moos (JHU)
Observations of D/H in the local interstellar medium (Moos et al. 2002) reveal a constant D/H ratio of (1.52 ± 0.08) \times 10-5, however there is a large scatter in the D/H ratio for stars located outside the local bubble (d \geq 200pc; Moos et al. 2002; Hoopes et al. 2003). We report on our Far Ultraviolet Spectroscopic Explorer observations of the subdwarfs LB~3241 [(l, b) = (273.\!\!\circ7, -62.\!\!\circ48); d = 610 pc] and PG~0952+519 [(l, b) = (164.\!\!\circ07, +49.\!\!\circ01); d = 530 pc]. Numerous interstellar lines of \ion{D}{1}, \ion{O}{1}, \ion{N}{1}, \ion{Fe}{2}, and \ion{P}{2} are detected. We present the results of our combined curve-of-growth and profile fitting methods for all species are presented. At distances of 500-600pc these subdwarfs are located well outside the local bubble. Although values of \ion{H}{1} are unavailable, we present D/N and D/O which enable further constraints to be placed on the variability of \ion{D}{1} outside the local bubble.
This work is based on data obtained for the Guaranteed Time Team by the NASA-CNES-CSA FUSE mission. Financial support has been provided by NASA contract NAS5-32985.
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Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.