# The SDSS-DR12 large-scale cross-correlation of damped Lyman alpha systems with the Lyman alpha forest

@article{PerezRafols2018TheSL,
title={The SDSS-DR12 large-scale cross-correlation of damped Lyman alpha systems with the Lyman alpha forest},
author={Ignasi P'erez-Rafols and Andreu Font-Ribera and Jordi Miralda-Escud'e and Michael Blomqvist and Simeon Bird and Nicolas Busca and H{\'e}lion du Mas des Bourboux and Llu{\'i}s Mas-Ribas and P. Noterdaeme and Patrick Petitjean and James Rich and Donald P. Schneider},
journal={Monthly Notices of the Royal Astronomical Society},
year={2018},
volume={473},
pages={3019-3038}
}
We present a measurement of the damped Ly α absorber (DLA) mean bias from the cross-correlation of DLAs and the Ly α forest, updating earlier results of Font-Ribera et al. (2012) with the final Baryon Oscillations Spectroscopic Survey data release and an improved method to address continuum fitting corrections. Our cross-correlation is well fitted by linear theory with the standard ΛCDM model, with a DLA bias of b_DLA = 1.99 ± 0.11; a more conservative analysis, which removes DLA in the Ly…

## Figures and Tables from this paper

Damped Lyman-α absorbers from Sloan digital sky survey DR16Q with Gaussian processes
• Physics
• 2021
We present a new catalogue of Damped Lyman-α absorbers from SDSS DR16Q, as well as new estimates of their statistical properties. Our estimates are computed with the Gaussian process models presented
Bias of Damped Lyman-$\alpha$ systems from their cross-correlation with CMB lensing
• Physics
• 2017
We cross-correlate the positions of damped Lyman-$\alpha$ systems (DLAs) and their parent quasar catalog with a convergence map derived from the Planck cosmic microwave background (CMB) temperature
Quasar – CIV forest cross-correlation with SDSS DR12
• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
We present a new determination of the large-scale clustering of the CIV forest (i.e. the absorption due to all CIV absorbers) using its cross-correlation with quasars in the Sloan Digital Sky Survey
A metal-line strength indicator for damped Lyman alpha (DLA) systems at low signal-to-noise
• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
The Baryon Oscillation Spectroscopic Survey of SDSS-III has provided an unprecedentedly large sample of Damped \lya systems (DLAs), the largest repositories of neutral hydrogen in the Universe. This
The cosmological bias factor of damped Lyman alpha systems: dependence on metal line strength
• Physics
Monthly Notices of the Royal Astronomical Society
• 2018
We measure the cosmological bias factor of damped Ly α absorbers (DLAs) from their cross-correlation with the Ly α forest absorption, as a function of the DLA metal strength, defined from an average
Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14
We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift z = 2.35 from the three-dimensional correlation of Lyman-α (Lyα) forest absorption and quasars. The study uses 266
Absorber Model: the Halo-like model for the Lyman-α forest
• Physics
• 2018
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
Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers
• Physics
• 2017
Correlations measured in three dimensions in the Lyman-alpha forest are contaminated by the presence of the damping wings of high column density (HCD) absorbing systems of neutral hydrogen (H I;
High-redshift damped Ly α absorbing galaxy model reproducing the N H I − Z distribution
• Physics
• 2020
We investigate how damped Lyman-$\alpha$ absorbers (DLAs) at z ~ 2-3, detected in large optical spectroscopic surveys of quasars, trace the population of star-forming galaxies. Building on previous
Estimates for the impact of ultraviolet background fluctuations on galaxy clustering measurements
• Physics
Monthly Notices of the Royal Astronomical Society
• 2019
Spatial fluctuations in ultraviolet backgrounds can subtly modulate the distribution of extragalactic sources, a potential signal and systematic for large-scale structure surveys. While this

## References

SHOWING 1-10 OF 84 REFERENCES
The large-scale cross-correlation of Damped Lyman alpha systems with the Lyman alpha forest: first measurements from BOSS
We present the first measurement of the large-scale cross-correlation of Lyα forest absorption and Damped Lyman α systems (DLA), using the 9th Data Release of the Baryon Oscillation Spectroscopic
Modelling Lyman α forest cross-correlations with LyMAS
We use the Lya Mass Association Scheme (LyMAS) to predict cross-correlations at z = 2.5 between dark matter haloes and transmitted flux in the Lya forest, and compare to crosscorrelations measured
The Lyman-α forest in three dimensions: measurements of large scale flux correlations from BOSS 1st-year data
Using a sample of approximately 14,000 z > 2.1 quasars observed in the first year of the Baryon Oscillation Spectroscopic Survey (BOSS), we measure the three-dimensional correlation function of
Damped Lyman α absorbers as a probe of stellar feedback
We examine the abundance, clustering and metallicity of Damped Lyman- Absorbers (DLAs) in a suite of hydrodynamic cosmological simulations using the moving mesh code AREPO . We incorporate models of
Metallicity Evolution of Damped Lyman-Alpha Galaxies
• Physics
• 2002
We have reanalyzed the existing data on Zinc abundances in damped Ly-alpha (DLA) absorbers to investigate whether their mean metallicity evolves with time. Most models of cosmic chemical evolution
Metallicity Evolution of Damped Lyman-alpha Systems out to z~5
• Physics
• 2012
We present chemical abundance measurements for 47 damped Lyman-alpha systems (DLAs), 30 at z>4, observed with the Echellette Spectrograph and Imager and the High Resolution Echelle Spectrometer on
Broadband distortion modeling in Lyman-α forest BAO fitting
In recent years, the Lyman-α absorption observed in the spectra of high-redshift quasars has been used as a tracer of large-scale structure by means of the three-dimensional Lyman-α forest
Survey for Galaxies Associated with z ~ 3 Damped Lyα Systems. II. Galaxy-Absorber Correlation Functions
• Physics
• 2006
We use 211 galaxy spectra from our survey for Lyman break galaxies (LBGs) associated with 11 damped Lyα systems (DLAs) to measure the three-dimensional LBG autocorrelation and DLA-LBG
Damped Lyman α systems in high‐resolution hydrodynamical simulations
• Physics
• 2009
We investigate the properties of damped Lyman α systems (DLAs) using high-resolution and large box-size cosmological hydrodynamical simulations of a A cold dark matter model. The numerical code used
Evolution of the cosmological mass density of neutral gas from Sloan Digital Sky Survey II - Data Release 7
• Physics
• 2009
We present the results of a search for damped Lyman-alpha (DLA) systems in the Sloan Digital Sky Survey II (SDSS), Data Release 7. We use a fully automatic procedure to identify DLAs and derive their