Andreu Font-Ribera
A5028921959- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
- Astrophysics and Cosmic Phenomena
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- CCD and CMOS Imaging Sensors
- Dark Matter and Cosmic Phenomena
- Statistical and numerical algorithms
- Astrophysics and Star Formation Studies
- Remote Sensing in Agriculture
- Astro and Planetary Science
- Astrophysical Phenomena and Observations
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Control Systems and Identification
- Computational Physics and Python Applications
- Advanced Statistical Methods and Models
- Solar and Space Plasma Dynamics
- Advanced Multi-Objective Optimization Algorithms
Institute for High Energy Physics
2020-2025
University College London
2017-2025
Institute of Science and Technology
2023-2024
Barcelona Institute for Science and Technology
2024
Universitat Autònoma de Barcelona
2022-2023
Institut de Physique de Nice
2023
Centre de Recerca Matemàtica
2023
Lawrence Berkeley National Laboratory
2012-2017
Kavli Institute for the Physics and Mathematics of the Universe
2016-2017
The University of Tokyo
2016-2017
Building on the legacy of Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program four spectroscopic surveys three scientific themes: dark energy cosmological parameters, history structure Milky Way, population giant planets around other stars. In keeping with SDSS tradition, will provide regular public releases all its data, beginning Data Release 8 (DR8), which was made in 2011 January includes SDSS-I SDSS-II images spectra reprocessed latest pipelines calibrations produced for...
The third generation of the Sloan Digital Sky Survey (SDSS-III) took data from 2008 to 2014 using original SDSS wide-field imager, and an upgraded multi-object fiber-fed optical spectrograph, a new near-infrared high-resolution novel interferometer. All SDSS-III are now made public. In particular, this paper describes Data Release 11 (DR11) including all acquired through 2013 July, 12 (DR12) adding July (including included in previous releases), marking end observing. Relative our public...
ABSTRACT The Sloan Digital Sky Survey III (SDSS-III) presents the first spectroscopic data from Baryon Oscillation Spectroscopic (BOSS). This ninth release (DR9) of SDSS project includes 535,995 new galaxy spectra (median z ∼ 0.52), 102,100 quasar 2.32), and 90,897 stellar spectra, along with presented in previous releases. These were obtained BOSS spectrograph taken between 2009 December 2011 July. In addition, parameters pipeline, which determines radial velocities, surface temperatures,...
DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through redshift-space distortions with wide-area galaxy quasar redshift survey. To trace underlying matter distribution, spectroscopic targets be selected in four classes from imaging data. We measure luminous red galaxies up to $z=1.0$. probe Universe out even higher redshift, target bright [O II] emission line $z=1.7$....
The Sloan Digital Sky Survey (SDSS) started a new phase in August 2008, with instrumentation and surveys focused on Galactic structure chemical evolution, measurements of the baryon oscillation feature clustering galaxies quasar Ly alpha forest, radial velocity search for planets around ~8000 stars. This paper describes first data release SDSS-III (and eighth counting from beginning SDSS). includes five-band imaging roughly 5200 deg^2 Southern Cap, bringing total footprint SDSS to 14,555...
The Baryon Oscillation Spectroscopic Survey (BOSS) is designed to measure the scale of baryon acoustic oscillations (BAO) in clustering matter over a larger volume than combined efforts all previous spectroscopic surveys large-scale structure. BOSS uses 1.5 million luminous galaxies as faint i = 19.9 10,000 deg2 BAO redshifts z < 0.7. Observations neutral hydrogen Lyα forest more 150,000 quasar spectra (g 22) will constrain redshift range 2.15 3.5. Early results from include first detection...
Abstract The DESI Legacy Imaging Surveys ( http://legacysurvey.org/ ) are a combination of three public projects (the Dark Energy Camera Survey, the Beijing–Arizona Sky and Mayall z -band Survey) that will jointly image ≈14,000 deg 2 extragalactic sky visible from northern hemisphere in optical bands g , r using telescopes at Kitt Peak National Observatory Cerro Tololo Inter-American Observatory. combined survey footprint is split into two contiguous areas by Galactic plane. imaging...
We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Ly$\alpha$ forests completed Sloan Digital Sky Survey (SDSS) lineage experiments in large-scale structure. These experiments, composed data SDSS, SDSS-II, BOSS, eBOSS, offer independent baryon acoustic oscillation (BAO) angular-diameter distances Hubble relative to sound horizon, $r_d$, eight different samples six growth rate parameter, $f\sigma_8$, redshift-space distortions (RSD)....
The Sloan Digital Sky Survey (SDSS) has been in operation since 2000 April. This paper presents the Tenth Public Data Release (DR10) from its current incarnation, SDSS-III. data release includes first spectroscopic Apache Point Observatory Galaxy Evolution Experiment (APOGEE), along with Baryon Oscillation Spectroscopic (BOSS) taken through 2012 July. APOGEE instrument is a near-infrared R ∼ 22,500 300 fiber spectrograph covering 1.514–1.696 μm. survey studying chemical abundances and radial...
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%...
Abstract The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) began observations in 2014 July. It pursues three core programs: Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and Extended Baryon Oscillation Spectroscopic (eBOSS). As well as its program, eBOSS contains two major subprograms: Time Domain (TDSS) SPectroscopic IDentification ERosita Sources (SPIDERS). This paper describes first data release from SDSS-IV,...
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,...
The Extended Baryon Oscillation Spectroscopic Survey (eBOSS) will conduct novel cosmological observations using the BOSS spectrograph at Apache Point Observatory. Observations be simultaneous with Time Domain (TDSS) designed for variability studies and Identification of eROSITA Sources (SPIDERS) program X-ray sources. eBOSS use four different tracers to measure distance-redshift relation baryon acoustic oscillations (BAO). Using more than 250,000 new, spectroscopically confirmed luminous red...
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 Fisher matrix projections for future cosmological parameter measurements, including neutrino masses, Dark Energy, curvature, modified gravity, the inflationary perturbation spectrum, non-Gaussianity, and dark radiation. focus on DESI generally redshift surveys (BOSS, HETDEX, eBOSS, Euclid, WFIRST), but also include CMB (Planck) weak gravitational lensing (DES LSST) constraints. The goal is to a consistent set of projections, concrete experiments, which are otherwise scattered...
We analyse the anisotropic clustering of Baryon Oscillation Spectroscopic Survey (BOSS) CMASS Data Release 11 (DR11) sample, which consists $690\,827$ galaxies in redshift range $0.43 < z 0.7$ and has a sky coverage $8\,498\,\text{deg}^2$. perform our analysis Fourier space using power spectrum estimator suggested by Yamamoto et al. (2006). measure multipole spectra self-consistent manner for first time sense that we provide proper way to treat survey window function integral constraint,...
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...
Abstract We present a measurement of baryonic acoustic oscillations (BAOs) from Ly α absorption and quasars at an effective redshift <?CDATA $z=2.33$?> using the complete extended Baryonic Oscillation Spectroscopic Survey (eBOSS). The 16th final eBOSS data release (SDSS DR16) contains all its predecessor, (BOSS), providing 210,005 with z q > 2.10 that are used to measure absorption. BAO scale both in autocorrelation cross-correlation 341,468 1.77. Apart statistical gain new deeper...
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 a measurement of baryon acoustic oscillations (BAO) in the cross-correlation quasars with Ly$\alpha$-forest flux-transmission at mean redshift $z=2.40$. The uses complete SDSS-III data sample: 168,889 forests and 234,367 from SDSS Data Release DR12. In addition to statistical improvement on our previous study using DR11, we have implemented numerous improvements analysis level allowing more accurate this cross-correlation. also developed first simulations us test different aspects...
We analyse the baryon acoustic oscillation (BAO) signal of final Baryon Oscillation Spectroscopic Survey (BOSS) data release (DR12). Our analysis is performed in Fourier space, using power spectrum monopole and quadrupole. The set includes 1198 006 galaxies over redshift range 0.2 < z 0.75. divide this into three (overlapping) bins with effective redshifts zeff = 0.38, 0.51 0.61. demonstrate reliability our pipeline N-body simulations as well ∼1000 MultiDark-Patchy mock catalogues that mimic...
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...