AAS 207th Meeting, 8-12 January 2006
Session 175 Recent Discoveries in the Far UV
Poster, Thursday, 9:20am-4:00pm, January 12, 2006, Exhibit Hall

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[175.10] Deuterium abundance in the interstellar medium: Six new targets observed with FUSE

G. Hebrard (Institut d'Astrophysique de Paris), S. D. Friedman (Space Telescope Science Institute), T. M. Tripp (University of Massachusetts), P. Chayer (JHU/UVIC), A. Lecavelier des Etangs (Institut d'Astrophysique de Paris), C. M. Oliveira, H. W. Moos (Johns Hopkins University), A. Vidal-Madjar (Institut d'Astrophysique de Paris)

We present deuterium abundance analyses of the 905-1187 Å spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) toward six new lines of sight: the white dwarfs WD2013+400 and WD1529+486, the subdwarfs LB1566, LSE263, and LSE234, and the B dwarf HD206773. Numerous interstellar lines are detected on the continuum of the stellar spectra. Analyses were performed through the simultaneous fits of interstellar absorption lines, including HI, DI, OI, NI, FeII, and H2, detected in the four FUSE channels. Curve of growth analyses were also performed. As far as possible, we excluded saturated lines in order to reduce possible systematic errors on the column density measurements. We report interstellar abundances on those lines of sight and compare them with those obtained toward other targets. These new data will help to understand the puzzling contrast seen between D/O and D/H within the interstellar medium.

This work is based on data obtained for the Guaranteed Time Team by the NASA-CNES-CSA FUSE mission operated by the Johns Hopkins University. Financial support to U. S. participants has been provided by NASA contract NAS5-32985. French participants are supported by CNES.

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