HD 140283: A Star in the Solar Neighborhood that Formed Shortly after the Big Bang

@article{Bond2013HD1A,
  title={HD 140283: A Star in the Solar Neighborhood that Formed Shortly after the Big Bang},
  author={Howard E. Bond and Edmund P. Nelan and Don A. VandenBerg and Gail H. Schaefer and Dianne Harmer Pennsylvania State University and Space Telescope Sceince Institute and University of Victoria and Chara Array and Georgia State University and Noao},
  journal={The Astrophysical Journal},
  year={2013},
  volume={765}
}
HD 140283 is an extremely metal-deficient and high-velocity subgiant in the solar neighborhood, having a location in the Hertzsprung-Russell diagram where absolute magnitude is most sensitive to stellar age. Because it is bright, nearby, unreddened, and has a well-determined chemical composition, this star avoids most of the issues involved in age determinations for globular clusters. Using the Fine Guidance Sensors on the Hubble Space Telescope, we have measured a trigonometric parallax of 17… Expand

Tables from this paper

Three Ancient Halo Subgiants: Precise Parallaxes, Compositions, Ages, and Implications for Globular Clusters
The most accurate ages for the oldest stars are those obtained for nearby halo subgiants because they depend almost entirely on just the measured parallaxes and absolute oxygen abundances. In thisExpand
High-resolution abundance analysis of HD 140283
HD 140283 is a reference subgiant that is metal poor and confirmed to be a very old star. The abundances of this type of old star can constrain the nature and nucleosynthesis processes that occurredExpand
Element Abundance Analysis of HD 140283 and Astrophysics Sources of Weak r-process Elements
Abstract HD 140283, a nearby extremely metal-poor subgiant star, formed shortly after the big bang, is thought to be the oldest star to date, and also a typical weak r-process star. Study of thisExpand
The age structure of the Milky Way's halo
We present a new, high-resolution chronographic (age) map of the Milky Way’s halo, based on the inferred ages of ∼130,000 field blue horizontal-branch (BHB) stars with photometry from the SloanExpand
On the Hubble Space Telescope Trigonometric Parallax of the Dwarf Nova SS Cygni
SS Cygni is one of the brightest dwarf novae (DNe), and one of the best-studied prototypes of the cataclysmic variables. Astrometric observations with the Fine Guidance Sensors (FGS) on the HubbleExpand
THE AGES OF 55 GLOBULAR CLUSTERS AS DETERMINED USING AN IMPROVED METHOD ALONG WITH COLOR-MAGNITUDE DIAGRAM CONSTRAINTS, AND THEIR IMPLICATIONS FOR BROADER ISSUES
Ages have been derived for 55 globular clusters (GCs) for which Hubble Space Telescope Advanced Camera for Surveys photometry is publicly available. For most of them, the assumed distances are basedExpand
12C/13C ratio and CNO abundances in the classical very old metal-poor dwarf HD 140283
Context. The isotope abundances provide powerful diagnostics of the chemical enrichment in our Galaxy. The star HD 140283 is one of the best-studied very metal-poor dwarf stars. It is very old, andExpand
A SEARCH FOR CORONAL ACTIVITY AMONG TWO METAL-POOR SUBDWARFS AND ONE SUBGIANT*
A search has been made using the XMM-Newton satellite for coronal soft X-ray emission from HD 19445, HD 25329, and HD 140283, three Population II stars in the Galactic halo having metallicities of /Expand
The local and distant Universe: stellar ages and H0
The ages of the oldest stellar objects in our galaxy provide an independent test of the current cosmological model as they give a lower limit to the age of the Universe. Recent accurate parallaxes byExpand
Star Cluster Ages in the Gaia Era
We use the framework developed as part of the MESA Isochrones and Stellar Tracks (MIST) project to assess the utility of several types of observables in jointly measuring the age and 1D stellar modelExpand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 48 REFERENCES
The Age of Globular Clusters in Light of Hipparcos: Resolving the Age Problem?
We review five independent techniques that are used to set the distance scale to globular clusters, including subdwarf main-sequence fitting utilizing the recent Hipparcos parallax catalog. TheseExpand
Permitted Oxygen Abundances and the Temperature Scale of Metal-poor Turnoff Stars
We use high-quality VLT/UVES published data of the permitted O I triplet and Fe II lines to determine oxygen and iron abundances in unevolved (dwarfs, turnoff, subgiants) metal-poor halo stars. TheExpand
Ages of globular clusters from hipparcos parallaxes of local subdwarfs
We report here initial but strongly conclusive results for absolute ages of Galactic globular clusters (GGCs). This study is based on high-precision trigonometric parallaxes from the HIPPARCOSExpand
Younger and Brighter - New Distances to Globular Clusters Based on HIPPARCOS Parallax Measurements of Local Subdwarfs
We have used new parallax measurements, obtained by the Hipparcos satellite, of fifteen nearby, metal-poor stars to re-define the subdwarf main-sequence. All of these stars have parallaxes determinedExpand
The Location of a Few Subdwarfs in the Theoretical H-R Diagram and the Helium Content of Population II
It is shown that photometric systems in which the line blocking is small enough to be accurately determined, like the GRI colors of Stebbins and Whitford, the vby colors of Strömgren, or the VRIJKExpand
Models for Old, Metal-Poor Stars with Enhanced α-Element Abundances. II. Their Implications for the Ages of the Galaxy's Globular Clusters and Field Halo Stars
The ages of globular clusters (GCs) and post-turnoff field stars in the Galactic halo are derived using new stellar evolutionary models that explicitly take into account the observed abundances ofExpand
The End of Nucleosynthesis: Production of Lead and Thorium in the Early Galaxy
We examine the Pb and Th abundances in 27 metal-poor stars (−3.1 56) enrichment was produced only by the rapid (r-) nucleosynthesis process. New abundances are derived from HubbleSpaceExpand
Beryllium, Oxygen, and Iron Abundances in Extremely Metal-Deficient Stars
The abundance of beryllium in the oldest, most metal-poor stars acts as a probe of early star formation and Galactic chemical evolution. We have analyzed high-resolution, high signal-to-noise ratioExpand
Beryllium abundances in metal‐poor stars★
We have determined beryllium (Be) abundances for 25 metal-poor stars based on the high-resolution and high signal-to-noise ratio spectra from the Very Large Telescope/Ultraviolet and Visual EchelleExpand
A high relative precision colour-magnitude diagram of M67
We have calibrated and combined an extensive set of BVI observations of M67 to produce a colour-magnitude diagram of stars measured with high relative precision. We have selected stars that are mostExpand
...
1
2
3
4
5
...