AAS 197, January 2001
Session 36. Deuterium Abundance in ISM: First {\it FUSE} Results
Display, Tuesday, January 9, 2001, 9:30am-7:00pm, Exhibit Hall

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[36.07] D/H Toward Feige 110: First FUSE Results

S.D Friedman, J.C. Howk, M. Andre, P. Chayer, H.W. Moos, W.R. Oegerle, C. Oliveira (JHU), G. Hebrard (CNRS/IAP), T. Tripp (Princeton), FUSE Science Team

We present measurements of neutral deuterium, oxygen, and nitrogen in the local interstellar medium along the sightline toward Feige 110, a subdwarf OB star at a distance of 180 pc in the direction l = 74.09 deg, b = -59.07 deg. The data were obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, and cover the 910-1185A bandpass at high resolution (< 20 km/sec). The complex spectrum exhibits many stellar features, including broad photospheric Lyman H I, He II and heavy metal absorption . A stellar model has been constructed which accounts for the H I and He II and some metal lines, and serves to improve estimates of the continuum near interstellar absorption lines. We report values of D/O and D/N and, using an H I column density derived from both the FUSE spectra and IUE measurements of the Ly alpha profile, a D/H value.

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

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