The Deuterium, Oxygen, and Nitrogen Abundance Toward LSE 44

Abstract

We present measurements of the column densities of interstellar DI, OI, NI, and H2 made with FUSE, and of HI made with IUE toward the sdO star LSE 44, at a distance of 554+/-66 pc. This target is among the seven most distant Galactic sight lines for which these abundance ratios have been measured. The column densities were estimated by profile fitting and curve of growth analyses. We find D/H = (2.24 +1.39 -1.32)E-5, D/O = (1.99 +1.30 -0.67)E-2, D/N = (2.75 +1.19 -0.89)E-1, and O/H = (1.13 +0.96 -0.71)E-3 (2 sigma). Of the most distant Galactic sight lines for which the deuterium abundance has been measured LSE 44 is one of the few with D/H higher than the Local Bubble value, but D/O toward all these targets is below the Local Bubble value and more uniform than the D/H distribution. (Abstract abridged.)

arXiv comment20 pages, including 9 figures. Accepted for publication in ApJ

References in corpus (26)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• On-Orbit Performance of the Far Ultraviolet Spectroscopic Explorer (FUSE) Satellite
• The cosmological baryon density from the deuterium to hydrogen ratio towards QSO absorption systems: D/H towards Q1243+3047
• The Definitive Abundance of Interstellar Oxygen
• Mixing Time Scales in a Supernova-Driven Interstellar Medium
• A New Measurement of the Primordial Abundance of Deuterium: Toward Convergence with the Baryon Density from the CMB?
• Disk-Halo Interaction - I. Three-Dimensional Evolution of the Galactic Disk
• Abundances of Deuterium, Oxygen, and Nitrogen in the Local Interstellar Medium: Overview of First Results from the Far Ultraviolet Spectroscopic Explorer Mission
• Oxygen Gas Phase Abundance Revisited
• Two New Low Galactic D/H Measurements from FUSE
• Spatial Variability in the Ratio of Interstellar Atomic Deuterium to Hydrogen. I. Observations toward delta Orionis by the Interstellar Medium Absorption Profile Spectrograph
• The Deuterium-to-Hydrogen Ratio in a Low-Metallicity Cloud Falling onto the Milky Way
• The deuterium-to-oxygen ratio in the interstellar medium
• Spatial Variability in the Ratio of Interstellar Atomic Deuterium to Hydrogen. II. Observations toward Gamma2 Velorum and Zeta Puppis by the Interstellar Medium Absorption Profile Spectrograph
• Is High Primordial Deuterium Consistent With Galactic Evolution?
• Evolution of Deuterium, 3He and 4He in the Galaxy
• D/H in a new Lyman limit quasar absorption system at z=3.256 towards PKS1937-1009
• Deuterium abundances
• Deuterated molecular hydrogen in the Galactic ISM. New observations along seven translucent sightlines
• Deuterium Toward Two Milky Way Disk Stars: Probing Extended Sight Lines with the Far Ultraviolet Spectroscopic Explorer
• On Non-Primordial Deuterium Production by Accelerated Particles
• Deuterium and Oxygen Toward Feige 110: Results from the Far Ultraviolet Spectroscopic Explorer (FUSE) Mission
• FUSE determination of a low deuterium abundance along an extended sight line in the Galactic disk
• Evidence for Correlated Titanium and Deuterium Depletion in the Galactic ISM
• The D/H Ratio in the Interstellar Medium toward the White Dwarf PG0038+199
• On the Variation of Deuterium and Oxygen Abundances in the Local Interstellar Medium

Cited by in corpus (9)

• What is the Total Deuterium Abundance in the Local Galactic Disk?
• Deuterium astration in the local disc and beyond
• Connecting the primordial and Galactic deuterium abundances
• Spitzer observations of hydrogen deuteride
• The Interstellar N/O Abundance Ratio: Evidence for Local Infall?
• Variations in the D/H ratio of extended sightlines from FUSE observations
• Variations in D/H and D/O from New FUSE Observations
• A High Precision Survey of the D/H Ratio in the Nearby Interstellar Medium
• Exploring Interstellar Titanium and Deuterium Abundances and Other Correlations