High-precision nuclear chronometer for the cosmos

Abstract

Nuclear chronometer, which predicts the ages of the oldest stars by comparing the present and initial abundances of long-lived radioactive nuclides, provides an independent dating technique for the cosmos. A new nuclear chronometer called Th-U-X chronometer is proposed, which imposes stringent constraints on the astrophysical conditions in the $r$-process simulation by synchronizing the previous Th/X, U/X and Th/U chronometers. The astrophysical uncertainties of nuclear chronometer are significantly reduced from more than $\pm 2$ billion years to within 0:3 billion years by the Th-U-X chronometer. The proposed chronometer is then applied to estimate the ages of the six metal-poor stars with observed uranium abundances, and the predicted ages are compatible with the cosmic age 13.8 billion years predicted from the cosmic microwave background radiation, but in contradictory with the new cosmic age 11.4 billion years from the gravitational lenses measurement.

arXiv comment5 pages, 4 figures

References in corpus (36)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• Multi-messenger Observations of a Binary Neutron Star Merger
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• Nuclear ground-state masses and deformations: FRDM(2012)
• Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
• The r-process of stellar nucleosynthesis: Astrophysics and nuclear physics achievements and mysteries
• Origin of the Heaviest Elements: the Rapid Neutron-Capture Process
• Microscopic mass formulae
• Surface diffuseness correction in global mass formula
• Identification of strontium in the merger of two neutron stars
• The impact of individual nuclear properties on $r$-process nucleosynthesis
• The extreme r-element rich, iron-poor halo giant CS31082-001: Implications for the r-process site(s) and radioactive cosmochronology
• Protoneutron star evolution and the neutrino driven wind in general relativistic neutrino radiation hydrodynamics simulations
• Collapsars as a major source of r-process elements
• Measurement of stellar age from uranium decay
• Neutron Star Mergers and Nucleosynthesis of Heavy Elements
• The Chemical Composition and Age of the Metal-Poor Halo Star BD +17^\circ 3248
• The r-process nucleosynthesis in the various jet-like explosions of magnetorotational core-collapse supernovae
• Discovery of HE 1523-0901, a Strongly r-Process Enhanced Metal-Poor Star with Detected Uranium
• r-Process Lanthanide Production and Heating Rates in Kilonovae
• Charged-Particle and Neutron-Capture Processes in the High-Entropy Wind of Core-Collapse Supernovae
• Current Status of r-Process Nucleosynthesis
• Tuning the Clock: Uranium and Thorium Chronometers Applied to CS 31082-001
• The r-process in the neutrino winds of core-collapse supernovae and U-Th cosmochronology
• The Hamburg/ESO R-process Enhanced Star survey (HERES) XI. The highly $r$-process-enhanced star CS 29497-004
• The R-Process Alliance: 2MASS J09544277+5246414, the Most Actinide-Enhanced R-II Star Known
• Actinides: How well do we know their stellar production?
• RAVE J203843.2-002333: The first highly r-process-enhanced star identified in the RAVE survey
• A measurement of the Hubble constant from angular diameter distances to two gravitational lenses
• Influence of nuclear physics inputs and astrophysical conditions on Th/U chronometer
• r-Process Abundance Universality and Actinide Cosmochronology
• Impact of New beta-decay Half-lives on r-process Nucleosynthesis
• Sensitivity study of \emph{r}-process abundances to nuclear masses
• Nuclear Reaction Screening, Weak Interactions, and r-Process Nucleosynthesis in High Magnetic Fields
• Reconstructing Masses of Merging Neutron Stars from Stellar $R$-Process Abundance Signatures
• Representative galaxy age-metallicity relationships

Cited by in corpus (5)

• Principal components of nuclear mass models
• Correlation between U/Th and Pb/Os abundance ratios and its application in nuclear cosmochronology
• Impact of nuclear mass models on $r$-process nucleosynthesis and heavy element abundances in $r$-process enhanced metal-poor stars
• Exploratory study on the masses of odd-$Z$ nuclei and $r$-process simulation based on the deformed relativistic Hartree-Bogoliubov theory in continuum
• Principal Components of Nuclear Mass Model Residuals