Isabelle Pâris
A5107336374- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Scientific Research and Discoveries
- Statistical and numerical algorithms
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Plant Water Relations and Carbon Dynamics
- Adaptive optics and wavefront sensing
- Black Holes and Theoretical Physics
- Gaussian Processes and Bayesian Inference
- Delphi Technique in Research
- History and Developments in Astronomy
- Advanced Mathematical Theories and Applications
- Atomic and Subatomic Physics Research
- Cardiovascular Disease and Adiposity
- Cardiovascular and exercise physiology
Centre National de la Recherche Scientifique
2010-2018
Laboratoire d’Astrophysique de Marseille
2016-2018
Aix-Marseille Université
2016-2018
Trieste Astronomical Observatory
2014-2017
National Institute for Astrophysics
2015-2016
Château Gombert
2016
Universidad de Santiago de Chile
2016
University of Chile
2012-2015
Sorbonne Université
2010-2015
Institut d'Astrophysique de Paris
2010-2015
We present measurements of galaxy clustering from the Baryon Oscillation Spectroscopic Survey (BOSS), which is part Sloan Digital Sky III (SDSS-III). These use Data Release 9 (DR9) CMASS sample, contains 264 283 massive galaxies covering 3275 square degrees with an effective redshift z = 0.57 and range 0.43 < 0.7. Assuming a concordance ΛCDM cosmological model, this sample covers volume 2.2 Gpc3, represents largest Universe ever surveyed at density, . measure angle-averaged correlation...
We derive constraints on cosmological parameters and tests of dark energy models from the combination baryon acoustic oscillation (BAO) measurements with cosmic microwave background (CMB) Type Ia supernova (SN) data. take advantage high-precision BAO galaxy clustering Ly-alpha forest (LyaF) in BOSS survey SDSS-III. data alone yield a high confidence detection energy, CMB angular scale they further imply nearly flat universe. Combining SN into an "inverse distance ladder" yields 1.7%...
(abridged) We describe the automated spectral classification, redshift determination, and parameter measurement pipeline in use for Baryon Oscillation Spectroscopic Survey (BOSS) of Sloan Digital Sky III (SDSS-III) as Data Release 9, encompassing 831,000 moderate-resolution optical spectra. give a review algorithms employed, changes to that have been implemented BOSS relative previous SDSS-I/II versions, including new sets stellar, galaxy, quasar templates. For color-selected CMASS sample...
We measure the large-scale cross-correlation of quasars with Lyman alpha forest absorption, using over 164,000 from Data Release 11 SDSS-III Baryon Oscillation Spectroscopic Survey. extend previous study roughly 60,000 9 to larger separations, allowing a measurement Baryonic Acoustic (BAO) scale along line sight $c/(H(z=2.36) ~ r_s) = 9.0 \pm 0.3$ and across $D_A(z=2.36) / r_s 10.8 0.4$, consistent CMB other BAO data. Using best fit value sound horizon Planck data ($r_s=147.49 Mpc$), we can...
We report a detection of the baryon acoustic oscillation (BAO) feature in flux-correlation function Ly{\alpha} forest high-redshift quasars with statistical significance five standard deviations. The study uses 137,562 redshift range $2.1\le z \le 3.5$ from Data Release 11 (DR11) Baryon Oscillation Spectroscopic Survey (BOSS) SDSS-III. This sample contains three times number used previous studies. measured position BAO peak determines angular distance, $D_A(z=2.34)$ and expansion rate,...
We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data Release 16 of extended Baryon Oscillation Spectroscopic (eBOSS). This comprises largest selection spectroscopically confirmed quasars to date. The full includes two sub-catalogs: a "superset" all SDSS-IV/eBOSS objects targeted as containing 1,440,615 observations and quasar-only 750,414 quasars, including 225,082 new appearing in an SDSS data release for first time, well known SDSS-I/II/III. automated...
We present measurements of the Baryon Acoustic Oscillation (BAO) scale in redshift-space using clustering quasars. consider a sample 147 000 quasars from extended Spectroscopic Survey (eBOSS) distributed over 2044 square degrees with redshifts 0.8 < z 2.2 and measure their spherically averaged both configuration Fourier space. Our observational data set 1400 simulated realizations allow us to detect preference for BAO that is greater than 2.8σ. determine distance = 1.52 3.8 per cent...
We present the first results from an ongoing survey for damped Lyman-α systems (DLAs) in spectra of z > 2 quasars observed course Baryon Oscillation Spectroscopic Survey (BOSS), which is part Sloan Digital Sky (SDSS) III. Our full (non-statistical) sample, based on Data Release 9, comprises 12 081 with log N(H i) ≥ 20, out 6839 have 20.3. This largest DLA sample ever compiled, superseding that SDSS-II by a factor seven.
We report a detection of the baryon acoustic oscillation (BAO) feature in three-dimensional correlation function transmitted flux fraction \Lya forest high-redshift quasars. The study uses 48,640 quasars redshift range $2.1\le z \le 3.5$ from Baryon Oscillation Spectroscopic Survey (BOSS) third generation Sloan Digital Sky (SDSS-III). At mean $z=2.3$, we measure monopole and quadrupole components for separations $20\hMpc<r<200\hMpc$. A peak is seen at separation equal to $(1.01\pm0.03)$...
We present the Data Release 12 Quasar catalog (DR12Q) from Baryon Oscillation Spectroscopic Survey (BOSS) of SDSS-III. This includes all SDSS-III/BOSS objects that were spectroscopically targeted as quasar candidates during full survey and are confirmed quasars via visual inspection spectra, have luminosities Mi[z=2]2.15 is about an order magnitude greater than number z>2.15 known prior to BOSS. Redshifts FWHMs provided for strongest emission lines (CIV, CIII], MgII). The identifies...
We use the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 9 (DR9) to detect and measure position of Baryonic Acoustic (BAO) feature in three-dimensional correlation function Lyman-α flux fluctuations at a redshift zeff = 2.4. The is clearly detected significance between 3 5 sigma (depending on broadband model method error covariance matrix estimation) consistent with predictions standard ΛCDM model. assess biases our method, stability possible systematic effects. fit resulting...
We present the Data Release 9 Quasar (DR9Q) catalog from Baryon Oscillation Spectroscopic Survey (BOSS) of Sloan Digital Sky III. The includes all BOSS objects that were targeted as quasar candidates during survey, are spectrocopically confirmed quasars via visual inspection, have luminosities Mi[z=2]<-20.5 (in a $\Lambda$CDM cosmology with H0 = 70 km/s/Mpc, $\Omega_{\rm M}$ 0.3, and $\Omega_{\Lambda}$ 0.7) either display at least one emission line full width half maximum (FWHM) larger than...
We present the Data Release 10 Quasar (DR10Q) catalog from Baryon Oscillation Spectroscopic Survey (BOSS) of Sloan Digital Sky III. The includes all BOSS objects that were targeted as quasar candidates during first 2.5 years survey and are confirmed quasars via visual inspection spectra. also known (mostly SDSS-I II) reobserved by BOSS. contains 166,583 (74,454 new discoveries since SDSS-DR9) detected over 6,373 deg$^{2}$ with robust identification redshift measured a combination principal...
The SDSS-III Baryon Oscillation Spectroscopic Survey (BOSS), a five-year spectroscopic survey of 10,000 deg^2, achieved first light in late 2009. One the key goals BOSS is to measure signature baryon acoustic oscillations distribution Ly-alpha absorption from spectra sample ~150,000 z>2.2 quasars. Along with measuring angular diameter distance at z\approx2.5, will provide direct measurement expansion rate Universe z > 2. biggest challenges achieving this goal an efficient target selection...
We present the Data Release 14 Quasar catalog (DR14Q) from extended Baryon Oscillation Spectroscopic Survey (eBOSS) of Sloan Digital Sky IV (SDSS-IV). This includes all SDSS-IV/eBOSS objects that were spectroscopically targeted as quasar candidates and are confirmed quasars via a new automated procedure combined with partial visual inspection spectra, have luminosities $M_{\rm i} \left[ z=2 \right] < -20.5$ (in $Λ$CDM cosmology $H_0 = 70 \ {\rm km s^{-1} Mpc ^{-1}}$, $Ω_{\rm M} 0.3$, Λ}...
We develop a new method, which is based on the optimal redshift weighting scheme, to extract maximal tomographic information of baryonic acoustic oscillations (BAO) and space distortions (RSD) from extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 14 quasar (DR14Q) survey. validate our method using Extended Zel'dovich mocks, apply pipeline eBOSS DR14Q sample in range 0.8 < |$z$| 2.2. report joint measurement fσ8 two-dimensional BAO parameters DA H at four effective...
We present reverberation mapping results from the first year of combined spectroscopic and photometric observations Sloan Digital Sky Survey Reverberation Mapping Project. successfully recover time delays between $g+i$-band emission broad H$\beta$ line for a total 44 quasars, H$\alpha$ in 18 quasars. Time are computed using JAVELIN CREAM software traditional interpolated cross-correlation function (ICCF): Using well defined criteria, we report measurements 32 13 lags with JAVELIN, 42 17...
Black hole feedback is now a standard component of galaxy formation models. These models predict that the impact black activity on its host likely peaked at z = 2–3, epoch strongest star and accretion in Universe. We used XShooter Very Large Telescope to measure rest-frame optical spectra four ∼ 2.5 extremely red quasars with infrared luminosities ∼1047 erg s−1. present discovery very broad (full width half max 2600–5000 km s−1), strongly blueshifted (by up 1500 s−1) [O iii] λ5007 Å emission...
We have used flux-transmission correlations in Lyα forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra 157 783 quasars redshift range 2.1 ≤ z 3.5 from Sloan Digital Sky Survey (SDSS) data release 12 (DR12). Besides statistical improvements on our previous studies using SDSS DR9 and DR11, we implemented numerous analysis procedure, allowing us construct a physical model correlation function investigate potential systematic errors determination BAO peak...
We present a new measurement of the optical Quasar Luminosity Function (QLF), using data from Sloan Digital Sky Survey-III: Baryon Oscillation Spectroscopic Survey (SDSS-III: BOSS). From SDSS-III Data Release Nine (DR9), we select uniform sample 22,301 i<=21.8 quasars over an area 2236 sq. deg with confirmed spectroscopic redshifts between 2.2<z<3.5, filling in key part luminosity-redshift plane for quasar studies. derive completeness survey through simulated photometry, and check this...
Using a sample of approximately 14,000 z>2.1 quasars observed in the first year Baryon Oscillation Spectroscopic Survey (BOSS), we measure three-dimensional correlation function absorption Lyman-alpha forest. The angle-averaged transmitted flux (F = exp(-tau)) is securely detected out to comoving separations 60 Mpc/h, detection correlations across widely separated sightlines. A quadrupole distortion redshift-space by peculiar velocities, signature gravitational instability origin structure...
We present the clustering measurements of quasars in configuration space based on Data Release 14 (DR14) Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic (eBOSS). This data set includes 148 659 spread over redshift range 0.8 ≤ z 2.2 and spanning 2112.9 deg2. use Convolution Lagrangian Perturbation Theory approach with a Gaussian Streaming model for distortions correlation function demonstrate its applicability dark matter haloes hosting eBOSS quasar tracers. At effective...
We measure the quasar two-point correlation function over redshift range 2.2 < z 2.8 using data from Baryon Oscillation Spectroscopic Survey. use a homogeneous subset of consisting 27 129 quasars with spectroscopic redshifts - by far largest such sample used for clustering measurements at these to date. The covers 3600 deg2, corresponding comoving volume 9.7 (h−1 Gpc)3 assuming fiducial Λ cold dark matter cosmology, and it has median absolute i-band magnitude −26, k-corrected z= 2. After...
We present the first measurement of large-scale cross-correlation Lyα forest absorption and Damped Lyman α systems (DLA), using 9th Data Release Baryon Oscillation Spectroscopic Survey (BOSS). The is clearly detected on scales up to 40h−1Mpc well fitted by linear theory prediction standard Cold Dark Matter model structure formation with expected redshift distortions, confirming its origin in gravitational evolution structure. amplitude DLA-Lyα depends only one free parameter, bias factor DLA...
We analyse the clustering of Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Data Release 14 quasar sample (DR14Q). measure redshift space distortions using power spectrum monopole, quadrupole and hexadecapole inferred from 148,659 quasars between redshifts 0.8 2.2 covering a total sky footprint 2112.9 deg$^2$. constrain logarithmic growth structure times amplitude dark matter density fluctuations, $f\sigma_8$, Alcock-Paczynski dilation scales which allow constraints to...