Large-scale structure in the Lyman-α forest: a new technique

@article{Liske1998LargescaleSI,
  title={Large-scale structure in the Lyman-$\alpha$ forest: a new technique},
  author={Jochen Liske and John K Webb and R. F. Carswell Unsw and Sydney and Ioa and Cambridge},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={1998},
  volume={301},
  pages={787-796}
}
ABSTRA C T We present a new technique for detecting structure on Mpc scales in the Lya forest. The technique is easy to apply in practice since it does not involve absorption-line fitting, but rather is based on the statistics of the transmitted flux. It identifies and assesses the statistical significance of regions of overdense or underdense Lya absorption and is fairly insensitive to the quality of the data. Using extensive simulations, we demonstrate that the new method is significantly… 

Figures and Tables from this paper

Large-scale structure in the Lyman-α forest—II. Analysis of a group of 10 QSOs

The spatial distribution of Lyα forest absorption systems towards 10 QSOs is analysed to search for large-scale structure over the redshift range 2.2 99 per cent confidence level. In individual

Absorber Model: the Halo-like model for the Lyman-α forest

We present a semi-analytic model for the Lyman-α forest that is inspired by the Halo Model. This model is built on the absorption line decomposition of the forest. Flux correlations are decomposed

The proximity effect in a close group of qsos

We present an analysis of the proximity effect in a sample of 10 2-A-resolution QSO spectra of the Lyα forest at . Rather than investigating variations in the number density of individual absorption

Deep Learning of Dark Energy Spectroscopic Instrument Mock Spectra to Find Damped Lyα Systems

A convolutional neural network (CNN) machine-learning model is updated and applied to discover and characterize damped Lyα systems (DLAs) based on Dark Energy Spectroscopic Instrument (DESI) mock spectra to yield a DLA classification accuracy above 99% for spectra that have signal-to-noise ratios (S/N) above 5 per pixel.

References

SHOWING 1-7 OF 7 REFERENCES

Proceedings of the 12th Texas symposium on relativistic astrophysics

These proceedings contain papers combining a wide range of topics, ranging from particle physics to the physics of collapsed objects. Included are discussions on cosmology and cosmological models;

Spectral analysis and its applications

Give us 5 minutes and we will show you the best book to read today. This is it, the spectral analysis and its applications that will be your best choice for better reading book. Your five times will

Computational astrophysics

As computers become more powerful and sophisticated, computational astrophysicists will be able to find out more about stellar evolution and other astronomical phenomena.

Distributions of (a) values, (b) positions and (c) scales of minima detected in reduced averaged transmission triangles, where absorbers form a ‘wall

  • (auto only,
  • 1997

IAP Colloquium “Structure and Evolution of the Intergalactic Medium from QSO Absorption Line Systems

  • A&A, 278,
  • 1995

Structure and Evolution of the IGM from QSO Absorption Line

  • Bahcall J. N. et al.,
  • 1993

Structure and Evolution of the IGM from QSO Absorption Line Systems

  • Proc. 13th IAP Colloquium
  • 1998