Far Ultraviolet Spectroscopic Explorer Observations of Hot Subdwarf and White Dwarf Stars.

Details Far Ultraviolet Spectroscopic Explorer Observations of Hot Subdwarf and White Dwarf Stars. Far Ultraviolet Spectroscopic Explorer Observations of Hot Subdwarf and White Dwarf Stars.

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.8302c&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #83.02; Bulletin of the American Astronomical Society, Vol. 32, p.1543

Astronomy and Astrophysics

Astrophysics

Scientific paper

One of the Far Ultraviolet Spectroscopic Explorer (FUSE) primary science programs is to study the D/H ratio in a variety of astrophysical environments. To measure this D/H ratio we observe lines of sight toward various FUV sources. A by-product of this investigation is the observation of stars emitting strong FUV radiation. Within the framework of measuring the D/H ratio in the local interstellar medium, we obtained FUSE spectra (905--1187 Å) of the hydrogen-rich white dwarfs G191-B2B and WD2211-495, the helium-rich white dwarf WD1634-573, the hot sdO subdwarf BD+28 4211, and the sdOB subdwarf Feige 110. Photospheric models for these stars are being developed to support the FUSE D/H program. The FUSE spectra of these stars are presented and we report a preliminary abundance analysis of their atmospheres. 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. P. C. is a Canadian representative to the FUSE Project supported by CSA under PWGSC. Financial support to U. S. participants has been provided by NASA contract NAS5-32985.

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