A search for metal-poor stars pre-enriched by pair-instability supernovae I. A pilot study for target selection from Sloan Digital Sky Survey

@article{Ren2012ASF,
  title={A search for metal-poor stars pre-enriched by pair-instability supernovae I. A pilot study for target selection from Sloan Digital Sky Survey},
  author={Jing Ren and Norbert Christlieb and G.-B. Zhao},
  journal={Research in Astronomy and Astrophysics},
  year={2012},
  volume={12},
  pages={1637 - 1648}
}
We report on a pilot study on identifying metal-poor stars pre-enriched by Pair-Instability Supernovae (PISNe). Very massive, first generation (Population III) stars (140 M☉ ≤ M ≤ 260 M☉) end their lives as PISNe, which have been predicted by theories, but no relics of PISNe have been observed yet. Among the distinct characteristics of the yields of PISNe, as predicted by theoretical calculations, are a strong odd-even effect, and a strong overabundance of Ca with respect to iron and the solar… 

Detectability of high-redshift superluminous supernovae with upcoming optical and near-infrared surveys – II. Beyond z = 6

Observational identification of the first stars is one of the great challenges in the modern astronomy. Although a single first star is too faint to be detected, supernova explosions of the first

Inferring the velocity of early massive stars from the abundances of extremely metal-poor stars

Context. The nature of the early generation of massive stars can be inferred by investigating the origin of the extremely metal-poor (EMP) stars, likely formed from the ejecta of one or a few

Detectability of the First Cosmic Explosions

We present a fully self-consistent simulation of a syntheti c survey of the furthermost cosmic explosions. The appearance of the first generation of sta rs (Population III) in the Universe represents

Population II/III Gamma-Ray Bursts

Gamma-ray bursts (GRBs) may provide the first direct observational evidence of the primordial stars that populated the universe at redshifts of \(z \gtrsim 15\). These cosmic explosions can shed

Near-Field Cosmology with Extremely Metal-Poor Stars

The oldest, most metal-poor stars in the Galactic halo and satellite dwarf galaxies present an opportunity to explore the chemical and physical conditions of the earliest star-forming environments in

Properties of High-redshift Gamma-Ray Bursts

The immense power of gamma-ray bursts (GRBs) makes them ideal probes of the early universe. By using absorption lines in the afterglows of high-redshift GRBs, astronomers can study the evolution of

Using machine learning for transient classification in searches for gravitational-wave counterparts

The large sky localization regions offered by the gravitational-wave interferometers require efficient follow-up of the many counterpart candidates identified by the wide field-of-view telescopes.

Potassium abundances in multiple stellar populations of the globular cluster NGC 4833

NGC 4833 is a metal-poor Galactic globular cluster (GC) whose multiple stellar populations present an extreme chemical composition. The Na-O anti-correlation is quite extended, which is in agreement

References

SHOWING 1-10 OF 45 REFERENCES

First stars V - Abundance patterns from C to Zn and supernova yields in the early Galaxy

In the framework of the ESO Large Programme "First Stars", very high-quality spectra of some 70 very metal-poor dwarfs and giants were obtained with the ESO VLT and UVES spectrograph. These stars are

Mg abundances in metal-poor halo stars as a tracer of early Galactic mixing

We present results of a detailed chemical analysis performed on 23 main-sequence turnoff stars having −3.4 ≤ (Fe/H) ≤− 2.2, a sample selected to be highly homogeneous in Teff and log(g). We

Abundances In Very Metal-Poor Dwarf Stars

We discuss the detailed composition of 28 extremely metal-poor (EMP) dwarfs, 22 of which are from the Hamburg/ESO Survey (HES), based on Keck echelle spectra. Our sample has a median [Fe/H] of -2.7

Uncovering the Chemical Signature of the First Stars in the Universe

The chemical abundance patterns observed in metal-poor Galactic halo stars contain the signature of the first supernovae, and thus allow us to probe the first stars that formed in the universe. We

Spectroscopy of Hot Stars in the Galactic Halo. II. The Identification and Classification of Horizontal-Branch and Other A-Type Stars

We discuss a spectroscopic and photometric technique that enables the identification and classification of field horizontal-branch (FHB) and other A-type stars, even from relatively low

Estimation of Stellar Metal Abundance. II. A Recalibration of the Ca II K Technique, and the Autocorrelation Function Method

We have recalibrated a method for the estimation of stellar metal abundance, parameterized as [Fe/H], based on medium-resolution (1–2 Å) optical spectra (the majority of which cover the wavelength

A Spectroscopic Study of the Ancient Milky Way: F- and G-Type Stars in the Third Data Release of the Sloan Digital Sky Survey

We perform an analysis of spectra and photometry for 22,770 stars included in the third data release (DR3) of the Sloan Digital Sky Survey (SDSS). We derive atmospheric parameters and distances. Our

ABUNDANCES IN TURNOFF STARS IN THE OLD, METAL-RICH OPEN CLUSTER, NGC 6791

Open clusters have long been used to illuminate both stellar evolution and Galactic evolution. The oldest clusters, though rather rare, can reveal the chemical and nucleosynthetic processes early in

A stellar relic from the early Milky Way

TLDR
This work reports the discovery of a low-mass star with an iron abundance as low as 1/200,000 of the solar value, which suggests that population III stars could still exist and that the first generation of stars also contained long-livedLow-mass objects.

Pair-Instability Supernovae, Gravity Waves, and Gamma-Ray Transients

Growing evidence suggests that the first generation of stars may have been quite massive (~100-300 M☉). If they retain their high mass until death, such stars will, after about 3 Myr, make