The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology

@article{Barkana2016TheRO,
  title={The Rise of the First Stars: Supersonic Streaming, Radiative Feedback, and 21-cm Cosmology},
  author={Rennan Barkana},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
  year={2016}
}
  • R. Barkana
  • Published 14 May 2016
  • Physics
  • arXiv: Cosmology and Nongalactic Astrophysics

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References

SHOWING 1-10 OF 384 REFERENCES

The 21-cm signature of the first stars during the Lyman-Werner feedback era

The formation of the first stars is an exciting frontier area in astronomy. Early redshifts (z ∼ 20) have become observationally promising as a result of a recently recognized effect of a supersonic

The rich complexity of 21-cm fluctuations produced by the first stars

We explore the complete history of the 21-cm signal in the redshift range z = 7-40. This redshift range includes various epochs of cosmic evolution related to primordial star formation, and should be

Reconstructing the nature of the first cosmic sources from the anisotropic 21-cm signal.

TLDR
It is shown that on observable scales, the anisotropy is large and thus measurable at most redshifts, and its form tracks the evolution of 21-cm fluctuations as they are produced early on by Lyman-α radiation fromstars, then switch to x-ray radiation from early heating sources, and finally to ionizing radiation from stars.

The X-ray spectra of the first galaxies: 21 cm signatures

The cosmological 21cm signal is a physics-rich probe of the early Universe, encoding information about both the ionization and the thermal history of the intergalactic medium (IGM). The latter is

Formation of the first stars

  • V. Bromm
  • Physics
    Proceedings of the International Astronomical Union
  • 2005
TLDR
Predictions for the upcoming James Webb space telescope (JWST), to be launched ~2018, and for 'stellar archaeology', which probes the abundance pattern in the oldest, most-metal poor stars in the authors' cosmic neighborhood, thereby constraining the nucleosynthesis inside the first supernovae are discussed.

Detecting early galaxies through their 21‐cm signature

New observations over the next few years of the emission of distant objects will help unfold the chapter in cosmic history around the era of the first galaxies. These observations will use the

Radio Signatures of H I at High Redshift: Mapping the End of the “Dark Ages”

The emission of 21 cm radiation from a neutral intergalactic medium (IGM) at high redshift is discussed in connection with the thermal and ionization history of the universe. The physical mechanisms

ENERGY FEEDBACK FROM X-RAY BINARIES IN THE EARLY UNIVERSE

X-ray photons, because of their long mean-free paths, can easily escape the galactic environments where they are produced, and interact at long distances with the intergalactic medium, potentially

Detecting the Earliest Galaxies through Two New Sources of 21 Centimeter Fluctuations

The first galaxies that formed at a redshift z ~ 20-30 emitted continuum photons with energies between the Lyα and Lyman limit wavelengths of hydrogen, to which the neutral universe was transparent
...