Precision measures of the primordial abundance of deuterium

@article{Cooke2014PrecisionMO,
  title={Precision measures of the primordial abundance of deuterium},
  author={Ryan J. Cooke and Max Pettini and Regina A. Jorgenson and Michael T. Murphy and Charles C. Steidel University of California and Santa Cruz and Institute of Radio Astronomy and University of Cambridge and Kavli Institute for Cosmology and Institute for Astronomy and University of Hawaii and Swinburne University of Technology and California Institute of Technology.},
  journal={The Astrophysical Journal},
  year={2014},
  volume={781},
  pages={31}
}
We report the discovery of deuterium absorption in the very metal-poor ([Fe/H] = –2.88) damped Lyα system at z_abs = 3.06726 toward the QSO SDSS J1358+6522. On the basis of 13 resolved D I absorption lines and the damping wings of the H I Lyα transition, we have obtained a new, precise measure of the primordial abundance of deuterium. Furthermore, to bolster the present statistics of precision D/H measures, we have reanalyzed all of the known deuterium absorption-line systems that satisfy a set… 
The primordial helium abundance from updated emissivities
Observations of metal-poor extragalactic H II regions allow the determination of the primordial helium abundance, Yp. The He I emissivities are the foundation of the model of the H II region's
Measurement of the primordial helium abundance from the intergalactic medium
Almost every helium atom in the Universe was created just a few minutes after the Big Bang through a process commonly referred to as Big Bang nucleosynthesis1,2. The amount of helium that was made
On the Deuterium-to-Hydrogen Ratio of the Interstellar Medium
Observations show that the global deuterium-to-hydrogen ratio (D/H) in the local interstellar medium (ISM) is about 90% of the primordial ratio predicted by big bang nucleosynthesis. The high
HST/COS Detection of Deuterated Molecular Hydrogen in a Damped Lyα System at z = 0.18
We report on the detection of deuterated molecular hydrogen, HD, at z = 0.18. HD and H2 are detected in HST/COS data of a low-metallicity (Z ~ 0.07 Z ☉) damped Lyα (DLA) system at z = 0.18562 toward
Searching for the Lowest-metallicity Galaxies in the Local Universe
Author(s): Hsyu, Tiffany | Advisor(s): Bolte, Michael | Abstract: Observational determinations of the primordial light element abundances produced during Big Bang Nucleosynthesis (BBN) provide an
The PHLEK Survey: A New Determination of the Primordial Helium Abundance
We present Keck NIRSPEC and Keck NIRES spectroscopy of sixteen metal-poor galaxies that have pre-existing optical observations. The near-infrared (NIR) spectroscopy specifically targets the HeI
Discovery of a Perseus-like cloud in the early Universe - H I-to-H2 transition, carbon monoxide and small dust grains at zabs≈ 2.53 towards the quasar J0000+0048
We present the discovery of a molecular cloud at z_abs sim 2.5255 along the line of sight to the quasar SDSS J000015.17+004833.3. We use a high-resolution spectrum obtained with the Ultraviolet and
Detection of the Missing Baryons toward the Sightline of H1821+643
Based on constraints from Big Bang nucleosynthesis and the cosmic microwave background, the baryon content of the high-redshift Universe can be precisely determined. However, at low redshift, about
The impact of new d(p,γ)3 rates on Big Bang Nucleosynthesis
We consider the effect on Big Bang Nucleosynthesis (BBN) of new measurements of the d(p,γ)3 cross section by the LUNA Collaboration. These have an important effect on the primordial abundance of D/H
Light WIMPs, Equivalent Neutrinos, BBN, and the CMB
Recent updates to the observational determinations of the primordial abundances of helium and deuterium are compared to the predictions of BBN to infer the universal ratio of baryons to photons (or,
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 33 REFERENCES
The Deuterium Abundance toward Q1937–1009
We present a new measurement of the deuterium-to-hydrogen ratio (D/H) in the Lyman limit absorption system at z = 3.572 toward Q1937-1009. Tytler, Fan & Burles (TFB) made the first extragalactic
A new, precise measurement of the primordial abundance of deuterium
The metal-poor (Z � 1/100 Z� ) damped Lyman α system (DLA) at redshift zabs = 3.049 84 in the zem � 3.030 QSO SDSS J1419+0829 has near-ideal properties for an accurate deter- mination of the
Deuterium abundance in the most metal-poor damped Lyman alpha system: converging on Ωb,0h2
The most metal-poor damped Lyα system known to date, at zabs= 2.61843 in the spectrum of the QSO Q0913+072, with an oxygen abundance of only ∼1/250 of the solar value, shows six well-resolved DI
The Deuterium abundance toward QSO 1009+2956
We present a measurement of the deuterium to hydrogen ratio (D/H) in a metal-poor absorption system at redshift z = 2.504 toward the QSO 1009+2956. We apply the new method of Burles & Tytler to
The Deuterium to Hydrogen Abundance Ratio toward a Fourth QSO: HS 0105+1619
We report the measurement of the primordial D/H abundance ratio toward QSO HS 0105+1619. The column density of the neutral hydrogen in the z 2.536 Lyman limit system is high, log N = 19.422 ± 0.009
A new candidate for probing Population III nucleosynthesis with carbon-enhanced damped Lyα systems†
We report the identification of a very metal poor damped Lyα system (DLA) at zabs = 3.067 295 that is modestly carbon enhanced, with an iron abundance of ∼1/700 solar ([Fe/H] =−2.84) and [C,O/Fe] ≃
The primordial helium abundance from updated emissivities
Observations of metal-poor extragalactic H II regions allow the determination of the primordial helium abundance, Yp. The He I emissivities are the foundation of the model of the H II region's
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
What Is the Total Deuterium Abundance in the Local Galactic Disk
Analyses of spectra obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite, together with spectra from the Copernicus and interstellar medium absorption profile spectrograph
The metal-poor end of the Spite plateau - I. Stellar parameters, metallicities, and lithium abundances
Context. The primordial nature of the Spite plateau is at odds with the WMAP satellite measurements, implying a primordial Li production at least three times higher than observed. It has also been
...
1
2
3
4
...