Quasar -- CIV forest cross-correlation with SDSS DR12

Abstract

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 (SDSS) Data Release 12 (DR12). We fit a linear bias model to the measured cross-correlation. We find that the transmission bias of the CIV forest, $b_{Fc}$, at a mean redshift of $z=2.3$, obeys the relation $(1+{\beta }_c)b_{Fc}=-0.024\pm 0.003$. Here, ${\beta }_c$ is the linear redshift space distortion parameter of the CIV absorption, which can only be poorly determined at ${\beta }_c=1.1\pm 0.6$ from our data. This transmission bias is related to the bias of CIV absorbers and their host halos through the effective mean optical depth of the CIV forest, ${\bar{\tau }}_c$. Estimating a value ${\bar{\tau }}_c(z)\simeq 0.01$ from previous studies of the CIV equivalent width distribution, our measurement implies a CIV absorber bias near unity, with a large error due to uncertainties in both ${\beta }_c$ and ${\bar{\tau }}_c$. This makes it compatible with the higher DLA bias $b_{\mathrm{DLA}}\simeq 2$ measured previously from the cross-correlation of DLAs and the Lyman-$\alpha$ forest. We discuss the implications of the CIV absorber bias for the mass distribution of their host halos. More accurate determinations of ${\bar{\tau }}_c(z)$ and ${\beta }_c$ are necessary to obtain a more robust measurement of this CIV absorber bias.

References in corpus (55)

• Planck 2015 results. XIII. Cosmological parameters
• The Sloan Digital Sky Survey: Technical Summary
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• The 2.5 m Telescope of the Sloan Digital Sky Survey
• SDSS-III: Massive Spectroscopic Surveys of the Distant Universe, the Milky Way Galaxy, and Extra-Solar Planetary Systems
• The Baryon Oscillation Spectroscopic Survey of SDSS-III
• On the normalisation of the cosmic star formation history
• The Sloan Digital Sky Survey Photometric Camera
• The Large Scale Bias of Dark Matter Halos: Numerical Calibration and Model Tests
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Spectral Classification and Redshift Measurement for the SDSS-III Baryon Oscillation Spectroscopic Survey
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations
• The Lyman Alpha Forest in the Spectra of QSOs
• The Sloan Digital Sky Survey Quasar Catalog: twelfth data release
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• Towards a Precise Measurement of Matter Clustering: Lyman-alpha Forest Data at Redshifts 2-4
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• Recovery of the Power Spectrum of Mass Fluctuations from Observations of the Lyman-alpha Forest
• Metallicity of the intergalactic medium using pixel statistics. II. The distribution of metals as traced by C IV
• Clustering of High Redshift ($z\ge 2.9$) Quasars from the Sloan Digital Sky Survey
• Efficient Photometric Selection of Quasars from the Sloan Digital Sky Survey: II. ~1,000,000 Quasars from Data Release Six
• The Observed Probability Distribution Function, Power Spectrum, and Correlation Function of the Transmitted Flux in the Lyman-alpha Forest
• The SDSS-III Baryon Oscillation Spectroscopic Survey: Quasar Target Selection for Data Release Nine
• The Sloan Digital Sky Survey quasar catalog: ninth data release
• Measurement of Baryon Acoustic Oscillations in the Lyman-alpha Forest Fluctuations in BOSS Data Release 9
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• Clustering of Low-Redshift (z <= 2.2) Quasars from the Sloan Digital Sky Survey
• The Sloan Digital Sky Survey quasar catalog: tenth data release
• The Power Spectrum of Mass Fluctuations Measured from the Lyman-alpha Forest at Redshift z=2.5
• Quasar Clustering from SDSS DR5: Dependences on Physical Properties
• The DEEP2 Galaxy Redshift Survey: Color and Luminosity Dependence of Galaxy Clustering at z~1
• The clustering of intermediate redshift quasars as measured by the Baryon Oscillation Spectroscopic Survey
• Think Outside the Color Box: Probabilistic Target Selection and the SDSS-XDQSO Quasar Targeting Catalog
• Clustering Analyses of 300,000 Photometrically Classified Quasars--I. Luminosity and Redshift Evolution in Quasar Bias
• Clustering of intermediate redshift quasars using the final SDSS III-BOSS sample
• The large-scale cross-correlation of Damped Lyman Alpha Systems with the Lyman Alpha Forest: First Measurements from BOSS
• Clustering of quasars in SDSS-IV eBOSS : study of potential systematics and bias determination
• Clustering Analyses of 300,000 Photometrically Classified Quasars--II. The Excess on Very Small Scales
• The large-scale Quasar-Lyman α Forest Cross-Correlation from BOSS
• ZOMG-I. How the cosmic web inhibits halo growth and generates assembly bias
• Fitting Methods for Baryon Acoustic Oscillations in the Lyman-α Forest Fluctuations in BOSS Data Release 9
• The Non-Linear Power Spectrum of the Lyman Alpha Forest
• The rise of the C IV mass density at z<2.5
• A 14 $h^{-3}$ Gpc${}^3$ study of cosmic homogeneity using BOSS DR12 quasar sample
• The SDSS-DR12 large-scale cross-correlation of Damped Lyman Alpha Systems with the Lyman Alpha Forest
• Precious Metals in SDSS Quasar Spectra I: Tracking the Evolution of Strong, 1.5 < z < 4.5 CIV Absorbers with Thousands of Systems
• A Simple Likelihood Method for Quasar Target Selection
• Properties of QSO Metal Line Absorption Systems at High Redshifts: Nature and Evolution of the Absorbers and New Evidence on Escape of Ionizing Radiation from Galaxies
• The Effect of High Column Density Systems on the Measurement of the Lyman αForest Correlation Function
• Metals in the z~3 intergalactic medium: results from an ultra-high signal-to-noise ratio UVES quasar spectrum
• The Mean Metal-line Absorption Spectrum of DLAs in BOSS
• Broadband distortion modeling in Lyman-$\alpha$ forest BAO fitting
• Simulating the Carbon Footprint of Galactic Halos
• The C IV forest as a probe of baryon acoustic oscillations

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• The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation
• LyaCoLoRe: Synthetic Datasets for Current and Future Lyman-$\alpha$ Forest BAO Surveys
• The extended Baryon Oscillation Spectroscopic Survey: measuring the cross-correlation between the MgII flux transmission field and quasars and galaxies at $z=0.59$
• Constraining IGM enrichment and metallicity with the C IV forest correlation function
• Transverse clues on the kpc-scale structure of the circumgalactic medium as traced by C IV absorption
• 3D Correlations in the Lyman-$\alpha$ Forest from Early DESI Data
• Investigating the Circumgalactic Medium through Mg II absorption coincidence
• Constraining the Size of the Circumgalactic Medium Using the Transverse Autocorrelation Function of C IV Absorbers in Paired Quasar Spectra