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View article: Erratum: “The Sloan Digital Sky Survey Reverberation Mapping Project: Hα and Hβ Reverberation Measurements from First-year Spectroscopy and Photometry” (2017, ApJ, 851, 21)
Erratum: “The Sloan Digital Sky Survey Reverberation Mapping Project: Hα and Hβ Reverberation Measurements from First-year Spectroscopy and Photometry” (2017, ApJ, 851, 21) Open
International audience
View article: On the structure and energetics of quasar broad absorption-line outflows
On the structure and energetics of quasar broad absorption-line outflows Open
Quasar accretion-disk outflows might play an important role in galaxy\nevolution, but they are notoriously difficult to study due to line saturation\nand blending problems in the Ly-alpha forest. We circumvent these problems by\nconstructi…
View article: The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift weights Open
We develop a new method, which is based on the optimal redshift weighting scheme, to extract the maximal tomographic information of baryonic acoustic oscillations (BAO) and redshift space distortions (RSD) from the extended Baryon Oscillat…
View article: Spectropolarimetry of high-redshift obscured and red quasars
Spectropolarimetry of high-redshift obscured and red quasars Open
Spectropolarimetry is a powerful technique that has provided critical support\nfor the geometric unification model of local active galactic nuclei. In this\npaper, we present optical (rest-frame UV) Keck spectropolarimetry of five\nluminou…
View article: Eclipsing damped Ly α systems in the Sloan Digital Sky Survey Data Release 12★
Eclipsing damped Ly α systems in the Sloan Digital Sky Survey Data Release 12★ Open
We present the results of our automatic search for proximate damped\nLy$\\alpha$ absorption (PDLA) systems in the quasar spectra from the Sloan\nDigital Sky Survey Data Release 12. We constrain our search to those PDLAs\nlying within 1500 …
View article: The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measurement of the growth rate of structure from the anisotropic correlation function between redshift 0.8 and 2.2
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measurement of the growth rate of structure from the anisotropic correlation function between redshift 0.8 and 2.2 Open
We present the clustering measurements of quasars in configuration space based on the Data Release 14 (DR14) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS). This data set includes 148 659 quasar…
View article: The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: structure growth rate measurement from the anisotropic quasar power spectrum in the redshift range 0.8 < z < 2.2
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: structure growth rate measurement from the anisotropic quasar power spectrum in the redshift range 0.8 < z < 2.2 Open
We analyse the clustering of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey Data Release 14 quasar sample (DR14Q).We measure the redshift space distortions using the power-spectrum monopole, quadrupole, an…
View article: The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy
The Time-domain Spectroscopic Survey: Target Selection for Repeat Spectroscopy Open
As astronomers increasingly exploit the information available in the time domain, spectroscopic variability in particular opens broad new channels of investigation. Here we describe the selection algorithms for all targets intended for rep…
View article: The Sloan Digital Sky Survey Reverberation Mapping Project: H$α$ and H$β$ Reverberation Measurements From First-year Spectroscopy and Photometry
The Sloan Digital Sky Survey Reverberation Mapping Project: H$α$ and H$β$ Reverberation Measurements From First-year Spectroscopy and Photometry Open
We present reverberation mapping results from the first year of combined spectroscopic and photometric observations of the Sloan Digital Sky Survey Reverberation Mapping Project. We successfully recover reverberation time delays between th…
View article: The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: first measurement of baryon acoustic oscillations between redshift 0.8 and 2.2
The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: first measurement of baryon acoustic oscillations between redshift 0.8 and 2.2 Open
We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using the clustering of quasars. We consider a sample of 147,000 quasars from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) distributed…
View article: Exploring cosmic homogeneity with the BOSS DR12 galaxy sample
Exploring cosmic homogeneity with the BOSS DR12 galaxy sample Open
In this study, we probe the transition to cosmic homogeneity in the Large Scale Structure (LSS) of the Universe using the CMASS galaxy sample of BOSS spectroscopic survey which covers the largest effective volume to date, 3 h-3 Gpc3 at 0.4…
View article: Quasars with P v broad absorption in BOSS data release 9
Quasars with P v broad absorption in BOSS data release 9 Open
Broad absorption lines (BALs) found in a significant fraction of quasar\nspectra identify high-velocity outflows that might be present in all quasars\nand could be a major factor in feedback to galaxy evolution. Understanding the\nnature o…
View article: Measurement of baryon acoustic oscillation correlations at<i>z</i> = 2.3 with SDSS DR12 Ly<i>α</i>-Forests
Measurement of baryon acoustic oscillation correlations at<i>z</i> = 2.3 with SDSS DR12 Ly<i>α</i>-Forests Open
We use flux-transmission correlations in \\Lya forests to measure the imprint\nof baryon acoustic oscillations (BAO). The study uses spectra of 157,783\nquasars in the redshift range $2.1\\le z \\le 3.5$ from the Sloan Digital Sky\nSurvey …
View article: SPECTRAL EVOLUTION IN HIGH REDSHIFT QUASARS FROM THE FINAL BARYON OSCILLATION SPECTROSCOPIC SURVEY SAMPLE
SPECTRAL EVOLUTION IN HIGH REDSHIFT QUASARS FROM THE FINAL BARYON OSCILLATION SPECTROSCOPIC SURVEY SAMPLE Open
We report on the diversity in quasar spectra from the Baryon Oscillation Spectroscopic Survey. After filtering the spectra to mitigate selection effects and Malmquist bias associated with a nearly flux-limited sample, we create high signal…
View article: WEAVE-QSO: A Massive Intergalactic Medium Survey for the William Herschel Telescope
WEAVE-QSO: A Massive Intergalactic Medium Survey for the William Herschel Telescope Open
In these proceedings we describe the WEAVE-QSO survey, which will observe around 400,000 high redshift quasars starting in 2018. This survey is part of a broader WEAVE survey to be conducted at the 4.2m William Herschel Telescope. We will …
View article: Spectral Evolution in High Redshift Quasars from the Final BOSS Sample
Spectral Evolution in High Redshift Quasars from the Final BOSS Sample Open
We report on the diversity in quasar spectra from the Baryon Oscillation Spectroscopic Survey. After filtering the spectra to mitigate selection effects and Malmquist bias associated with a nearly flux-limited sample, we create high signal…
View article: Discovery of a Perseus-like cloud in the early Universe
Discovery of a Perseus-like cloud in the early Universe Open
We present the discovery of a molecular cloud at z abs ≈ 2.5255 along the line of sight to the quasar SDSS J 000015.17+004833.3. We use a high-resolution spectrum obtained with the Ultraviolet and Visual Echelle Spectrograph together with …
View article: Extremely red quasars in BOSS
Extremely red quasars in BOSS Open
Red quasars are candidate young objects in an early transition stage of massive galaxy evolution. Our team recently discovered a population of extremely red quasars (ERQs) in the Baryon Oscillation Spectroscopic Survey (BOSS) that has a su…
View article: XQ-100: A legacy survey of one hundred 3.5 ≲ z ≲ 4.5 quasars observed with VLT/X-shooter⋆⋆⋆
XQ-100: A legacy survey of one hundred 3.5 ≲ z ≲ 4.5 quasars observed with VLT/X-shooter⋆⋆⋆ Open
We describe the execution and data reduction of the European Southern Observatory Large Programme “Quasars and their absorption lines: a legacy survey of the high-redshift Universe with VLT/X-shooter” (hereafter “XQ-100”). XQ-100 has produ…
View article: Discovery of a Perseus-like cloud in the early Universe: HI-to-H2 transition, carbon monoxide and small dust grains at zabs=2.53 towards the quasar J0000+0048
Discovery of a Perseus-like cloud in the early Universe: HI-to-H2 transition, carbon monoxide and small dust grains at zabs=2.53 towards the quasar J0000+0048 Open
We present the discovery of a molecular cloud at zabs=2.5255 along the line of sight to the quasar J0000+0048. We perform a detailed analysis of the absorption lines from ionic, neutral atomic and molecular species in different excitation …
View article: The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release
The Sloan Digital Sky Survey Quasar Catalog: Twelfth data release Open
We present the Data Release 12 Quasar catalog (DR12Q) from the Baryon Oscillation Spectroscopic Survey (BOSS) of the Sloan Digital Sky Survey III. This catalog includes all SDSS-III/BOSS objects that were spectroscopically targeted as quas…
View article: XQ-100: A legacy survey of one hundred 3.5 ≲<i>z</i>≲ 4.5 quasars observed with VLT/X-shooter
XQ-100: A legacy survey of one hundred 3.5 ≲<i>z</i>≲ 4.5 quasars observed with VLT/X-shooter Open
We describe the execution and data reduction of the European Southern\nObservatory Large Programme "Quasars and their absorption lines: a legacy\nsurvey of the high-redshift universe with VLT/XSHOOTER" (hereafter `XQ-100').\nXQ-100 has pro…
View article: Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey
Nature and statistical properties of quasar associated absorption systems in the XQ-100 Legacy Survey Open
We statistically study the physical properties of a sample of narrow absorption line (NAL) systems looking for empirical evidences to distinguish between intrinsic and intervening NALs without taking into account any a priori definition or…
View article: Extended Lyα emission around quasars with eclipsing damped Lyα systems
Extended Lyα emission around quasars with eclipsing damped Lyα systems Open
We present spectroscopic observations of six high redshift (zem > 2) quasars, which have been selected for their Lyman α (Lyα) emission region being only partially covered by a strong proximate (zabs ∼ zem) coronagraphic damped Lyα system …
View article: Detection of emission lines from<i>z</i>∼ 3 DLAs towards the QSO J2358+0149
Detection of emission lines from<i>z</i>∼ 3 DLAs towards the QSO J2358+0149 Open
Using VLT/X-shooter we searched for emission line galaxies associated to four\ndamped Lyman-$\\alpha$ systems (DLAs) and one sub-DLA at 2.73<=z<=3.25 towards\nQSO J2358+0149. We detect [O III] emission from a "low-cool" DLA at z_abs =\n2.9…
View article: The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity function (<i>Corrigendum</i>)
The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity function (<i>Corrigendum</i>) Open
International audience
View article: Discovery of extreme [O iii] λ5007 Å outflows in high-redshift red quasars
Discovery of extreme [O iii] λ5007 Å outflows in high-redshift red quasars Open
Black hole feedback is now a standard component of galaxy formation models.\nThese models predict that the impact of black hole activity on its host galaxy\nlikely peaked at z=2-3, the epoch of strongest star formation activity and\nblack …
View article: The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity function
The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity function Open
The extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey (SDSS-IV/eBOSS) has an extensive quasar program that combines several selection methods. Among these, the photometric variability technique provides highl…
View article: Large-scale clustering of Lyman α emission intensity from SDSS/BOSS
Large-scale clustering of Lyman α emission intensity from SDSS/BOSS Open
We present a tentative detection of the large-scale structure of Ly α emission in the Universe at redshifts z = 2–3.5 by measuring the cross-correlation of Ly α surface brightness with quasars in Sloan Digital Sky Survey/Baryon Oscillation…
View article: The evolution of neutral gas in damped Lyman α systems from the XQ-100 survey
The evolution of neutral gas in damped Lyman α systems from the XQ-100 survey Open
We present a sample of 38 intervening Damped Lyman $\\alpha$ (DLA) systems\nidentified towards 100 $z>3.5$ quasars, observed during the XQ-100 survey. The\nXQ-100 DLA sample is combined with major DLA surveys in the literature. The\nfinal …