What Is the Total Deuterium Abundance in the Local Galactic Disk?

  title={What Is the Total Deuterium Abundance in the Local Galactic Disk?},
  author={Jeffrey L. Linsky and Bruce T. Draine and H. Warren Moos and Edward B. Jenkins and Brian E. Wood and Cristina Oliveira and William P. Blair and Scott D. Friedman and C{\'e}cile Gry and D. C. Knauth and Jeffrey W. Kruk and Sylvestre Lacour and Nicolas Lehner and Seth Redfield and J. Michael Shull and George Sonneborn and Gerard M. Williger},
  journal={The Astrophysical Journal},
  pages={1106 - 1124}
Analyses of spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, together with spectra from the Copernicus and interstellar medium absorption profile spectrograph (IMAPS) instruments, reveal an unexplained, very wide range in the observed deuterium/hydrogen (D/H) ratios for interstellar gas in the Galactic disk beyond the Local Bubble. We argue that spatial variations in the depletion of deuterium onto dust grains can explain these local variations in the observed… 

The total deuterium abundance in the local Galactic disk: decisions and implications

  • J. Linsky
  • Physics
    Proceedings of the International Astronomical Union
  • 2009
Abstract Analyses of FUSE spacecraft spectra have provided measurements of D/H in the gas phase of the interstellar medium for many lines of sight extending to several kpc from the Sun. These

The Galactic deuterium abundance and dust depletion: insights from an expanded Ti/H sample

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Abstract Analysis of UV spectra obtained with the HST, FUSE and other satellites provides a new understanding of the deuterium abundance in the local region of the galactic disk. The wide range of

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On the Deuterium-to-hydrogen Ratio of the Interstellar Medium

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(Un)true deuterium abundance in the Galactic disk

Abstract Deuterium has a special place in cosmology, nuclear astrophysics, and galactic chemical evolution, because of its unique property that it is only created in the big bang nucleosynthesis

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Chemical features of the local stellar disc have firmly established that long-term, continuous star formation has been accompanied by a steady rate of accretion of low-metallicity gas from the halo.



Deuterium Abundance in the Interstellar Gas of the Galactic Anticenter from the 327 MHz Line

The deuterium abundance in the primordial gas formed during the big bang is dependent on the baryon-to-photon ratio during nucleosynthesis. We report a measurement of the deuterium-to-hydrogen (D/H)

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Current measurements indicate that the deuterium abundance in diffuse interstellar gas varies spatially by a factor of ~4 among sight lines extending beyond the Local Bubble. One plausible

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Using Far Ultraviolet Spectroscopic Explorer (FUSE) and Hubble Space Telescope observations of the QSO PG 1259+593, we detect D I Lyman series absorption in high-velocity cloud Complex C, a

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High-resolution spectra of the hot white dwarf G191-B2B, covering the wavelength region 905-1187 Å, were obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE). These data were used in

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We present an analysis of high-resolution Hubble Space Telescope (HST) Space Telescope Imaging Spectrograph (STIS) observations of O I λ1356 and H I Lyα absorption in 36 sight lines that probe a

Deuterium astration in the local disc and beyond

Estimates of the interstellar deuterium abundance span a wide range of values. Until recently, it was customary to adopt the abundance of deuterium measured in the Local Bubble as representative of

Abundances of Deuterium, Nitrogen, and Oxygen toward HZ 43A: Results from the FUSE Mission

We present an analysis of interstellar absorption along the line of sight to the nearby white dwarf star HZ 43A. The distance to this star is 68 ± 13 pc, and the line of sight extends toward the

The Cosmological Baryon Density from the Deuterium-to-Hydrogen Ratio in QSO Absorption Systems: D/H toward Q1243+3047

We report the detection of deuterium absorption at redshift 2.525659 toward Q1243+3047. We describe improved methods to estimate the deuterium to hydrogen abundance ratio (D/H) in absorption systems,