Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:astro-ph/0112296)
· On-line Data
· References in the article
· Citations to the Article (42) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (7)
· Also-Read Articles (Reads History)
· HEP/Spires Information
·
· Translate This Page
Title:
Deuterium Abundance toward WD 1634-573: Results from the FUSE Mission
Authors:
Wood, B. E.; Linsky, J. L.; Hébrard, G.; Vidal-Madjar, A.; Lemoine, M.; Moos, H. W.; Sembach, K. R.; Jenkins, E. B.
Affiliation:
AA(JILA, University of Colorado and NIST, Boulder, CO 80309-0440 .), AB(JILA, University of Colorado and NIST, Boulder, CO 80309-0440 .), AC(Institut d'Astrophysique de Paris, CNRS, 98 bis Boulevard Arago, F-75014 Paris, France.), AD(Institut d'Astrophysique de Paris, CNRS, 98 bis Boulevard Arago, F-75014 Paris, France.), AE(Institut d'Astrophysique de Paris, CNRS, 98 bis Boulevard Arago, F-75014 Paris, France.), AF(Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218.), AG(Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218.), AH(Princeton University Observatory, Princeton, NJ 08544.)
Publication:
The Astrophysical Journal Supplement Series, Volume 140, Issue 1, pp. 91-102. (ApJS Homepage)
Publication Date:
05/2002
Origin:
UCP
ApJ Keywords:
ISM: Abundances, Stars: Individual: Alphanumeric: WD 1634-573, Ultraviolet: ISM, Stars: White Dwarfs
DOI:
10.1086/339127
Bibliographic Code:
2002ApJS..140...91W

Abstract

We use Far Ultraviolet Spectroscopic Explorer (FUSE) observations to study interstellar absorption along the line of sight to the white dwarf WD 1634-573 (d=37.1+/-2.6 pc). Combining our measurement of D I with a measurement of H I from Extreme Ultraviolet Explorer data, we find a D/H ratio toward WD 1634-573 of D/H=(1.6+/-0.5)×10-5. In contrast, multiplying our measurements of DI/OI=0.035+/-0.006 and DI/NI=0.27+/-0.05 with published mean Galactic interstellar medium (ISM) gas-phase O/H and N/H ratios yields D/HO=(1.2+/-0.2)×10-5 and D/HN=(2.0+/-0.4)×10-5, respectively. Note that all uncertainties quoted above are 2 σ. The inconsistency between D/HO and D/HN suggests that either the O I/H I or the N I/H I ratio toward WD 1634-573 must be different from the previously measured average ISM O/H and N/H values. The computation of D/HN from D I/N I is more suspect, since the relative N and H ionization states could conceivably vary within the local ISM, while the O and H ionization states will be more tightly coupled by charge exchange. Based on observations made with the NASA-CNES-CSA Far Ultraviolet Spectroscopic Explorer (FUSE), which is operated for NASA by Johns Hopkins University under NASA contract NAS 5-32985.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints