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Interstellar Deuterium, Nitrogen and Oxygen Towards HZ43A: Results from the Far Ultraviolet Spectroscopic Explorer (FUSE) MissionWe present an analysis of interstellar absorption along the line of sight to the nearby white dwarf star HZ43A. The distance to this star is 68+/-13 pc, and the line of sight extends toward the north Galactic pole. Column densities of O(I), N(I), and N(II) were derived from spectra obtained by the Far Ultraviolet Spectroscopic Explorer (FUSE), the column density of D(I) was derived from a combination of our FUSE spectra and an archival HST GARDENS spectrum, and the column density of H(I) was derived from a combination of the GARDENS spectrum and values derived from EUVE data obtained from the literature. We find the following abundance ratios (with 2 sigma uncertainties): D(I)/H(I)=(1.66+/-0.28)x10(exp -5), O(I)/H(I)=(3.63+/-0.84)x10(exp -4), and N(I)/H(I)=(3.80+/-0.74)x10(exp -5). The N(II) column density was slightly greater than that of N(I), indicating that ionization corrections are important when deriving nitrogen abundances. Other interstellar species detected along the line of sight were C(II), C(III), O(VI), Si(II), Ar(I), Mg(II) and Fe(II); an upper limit was determined for N(III). No elements other than H(I) were detected in the stellar photosphere.
Document ID
20020067791
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Kruk, J. W. (Johns Hopkins Univ. Baltimore, MD United States)
Howk, J. C. (Johns Hopkins Univ. Baltimore, MD United States)
Andre, M. (Johns Hopkins Univ. Baltimore, MD United States)
Moos, H. W. (Johns Hopkins Univ. Baltimore, MD United States)
Oegerle, William R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Oliveira, C. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Sembach, K. R. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Chayer, P. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Linsky, J. L. (Colorado Univ. Boulder, CO United States)
Wood, B. E. (Colorado Univ. Boulder, CO United States)
Date Acquired
September 7, 2013
Publication Date
January 1, 2002
Subject Category
Astrophysics
Funding Number(s)
CONTRACT_GRANT: NAS5-32985
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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