E. Armengaud
A5029192608- Dark Matter and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Neutrino Physics Research
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Medical Imaging and Pathology Studies
- Stellar, planetary, and galactic studies
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- CCD and CMOS Imaging Sensors
- Nuclear physics research studies
- Particle accelerators and beam dynamics
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Particle Accelerators and Free-Electron Lasers
- Superconducting and THz Device Technology
- Calibration and Measurement Techniques
- Remote Sensing in Agriculture
- Superconducting Materials and Applications
Institut de Recherche sur les Lois Fondamentales de l'Univers
2016-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2015-2024
CEA Paris-Saclay
2015-2024
Université Paris-Saclay
2009-2024
CEA Paris-Saclay - Etablissement de Saclay
2020-2021
University of Insubria
2015
DSM (Netherlands)
2007-2012
Centre National de la Recherche Scientifique
2004-2009
Université Paris Cité
2004-2009
Joint Institute for Nuclear Research
2009
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 We describe the Sloan Digital Sky Survey IV (SDSS-IV), a project encompassing three major spectroscopic programs. The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is observing hundreds of thousands Milky Way stars at high resolution and signal-to-noise ratios in near-infrared. Mapping Nearby Galaxies (MaNGA) survey obtaining spatially resolved spectroscopy for nearby galaxies (median <?CDATA $z\sim 0.03$?> ). extended Baryon Oscillation Spectroscopic (eBOSS)...
Using data collected at the Pierre Auger Observatory during past 3.7 years, we demonstrated a correlation between arrival directions of cosmic rays with energy above 6 × 10 19 electron volts and positions active galactic nuclei (AGN) lying within ∼75 megaparsecs. We rejected hypothesis an isotropic distribution these least 99% confidence level from prescribed priori test. The observed is compatible that highest-energy particles originate nearby extragalactic sources whose flux has not been...
The fourth generation of the Sloan Digital Sky Survey (SDSS-IV) has been in operation since 2014 July. This paper describes second data release from this phase, and 14th SDSS overall (making Data Release Fourteen or DR14). makes taken by SDSS-IV its first two years (2014–2016 July) public. Like all previous releases, DR14 is cumulative, including most recent reductions calibrations phase began operations 2000. New public extended Baryon Oscillation Spectroscopic Survey; Apache Point...
The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. spectral index gamma particle flux, J proportional, variantE;{-gamma}, energies between 4 eV and 10;{19} 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) higher energies. hypothesis a single power law rejected with significance greater than 6 standard deviations. data are consistent prediction by Greisen Zatsepin Kuz'min.
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,...
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...
This paper documents the sixteenth data release (DR16) from Sloan Digital Sky Surveys; fourth and penultimate phase (SDSS-IV). is first of southern hemisphere survey Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2); new APOGEE-2 North are also included. DR16 notable as final for main cosmological program Extended Baryon Oscillation Spectroscopic Survey (eBOSS), all raw reduced spectra that project released here. includes Time Domain (TDSS) SPectroscopic IDentification...
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...
The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO look for axions or axion-like particles (ALPs) originating in the Sun via Primakoff conversion of solar plasma photons. In terms signal-to-noise ratio, about 4–5 orders magnitude more sensitive than CAST, currently most powerful helioscope, reaching sensitivity to axion-photon couplings down few × 10−12 GeV−1 and thus probing large fraction unexplored ALP parameter space....
If a significant fraction of the dark matter in Universe is made an ultra-light scalar field, named fuzzy (FDM) with mass $m_a$ order $10^{-22}-10^{-21}$ eV, then its de Broglie wavelength large enough to impact physics scale structure formation. In particular, associated cut-off linear power spectrum modifies intergalactic medium (IGM) at scales probed by Lyman-$\alpha$ forest distant quasars. We study this effect making use dedicated cosmological simulations which take into account...
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}...
The EDELWEISS collaboration has performed a search for dark matter particles with masses below the GeV-scale 33.4-g germanium cryogenic detector operated in surface lab. energy deposits were measured using neutron-transmutation-doped Ge thermal sensor 17.7~eV (RMS) baseline heat resolution leading to 60~eV analysis threshold. Despite moderate lead shielding and high-background environment, first sub-GeV spin-independent limit based on target been achieved. experiment provides most stringent,...
We present the first Ge-based constraints on sub-MeV/c^{2} dark matter (DM) particles interacting with electrons using a 33.4 g Ge cryogenic detector 0.53 electron-hole pair (rms) resolution, operated underground at Laboratoire Souterrain de Modane. Competitive are set DM-electron scattering cross section, as well kinetic mixing parameter of photons down to 1 eV/c^{2}. In particular, most stringent limits for photon DM in 6 9 eV/c^{2} range. These results demonstrate high relevance detectors...
The Dark Energy Spectroscopic Instrument (DESI) was designed to conduct a survey covering 14,000 deg$^2$ over five years constrain the cosmic expansion history through precise measurements of Baryon Acoustic Oscillations (BAO). scientific program for DESI evaluated during month Survey Validation (SV) campaign before beginning full operations. This produced deep spectra tens thousands objects from each stellar (MWS), bright galaxy (BGS), luminous red (LRG), emission line (ELG), and quasar...
Abstract The Dark Energy Spectroscopic Instrument (DESI) completed its 5 month Survey Validation in 2021 May. Spectra of stellar and extragalactic targets from constitute the first major data sample DESI survey. This paper describes public release those spectra, catalogs derived properties, intermediate products. In total, includes good-quality spectral information 466,447 objects targeted as part Milky Way Survey, 428,758 Bright Galaxy 227,318 Luminous Red sample, 437,664 Emission Line...
Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact this excess on dark matter or neutrino sensitivity these experiments, collective effort has been started share knowledge about individual observations. For this, EXCESS Workshop was initiated. In its first iteration in June 2021, ten rare search collaborations contributed initiative via talks...
The Dark Energy Spectroscopic Instrument (DESI) completed its five-month Survey Validation in May 2021. Spectra of stellar and extragalactic targets from constitute the first major data sample DESI survey. This paper describes public release those spectra, catalogs derived properties, intermediate products. In total, includes good-quality spectral information 466,447 objects targeted as part Milky Way Survey, 428,758 Bright Galaxy 227,318 Luminous Red sample, 437,664 Emission Line 76,079...
Abstract A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) optical spectroscopic data to quantify metrics. In this paper we present results from VI quasar using deep coadded SV spectra. We show that majority (≈70%) main-survey targets are spectroscopically confirmed as quasars, with ≈16% galaxies, ≈6% stars, and ≈8% low-quality spectra lacking reliable features. nonnegligible fraction quasars misidentified by...
Abstract The Dark Energy Spectroscopic Instrument (DESI) Survey has obtained a set of spectroscopic measurements galaxies to validate the final survey design and target selections. To assist in these tasks, we visually inspect DESI spectra approximately 2500 bright galaxies, 3500 luminous red (LRGs), 10,000 emission-line (ELGs) obtain robust redshift identifications. We then utilize inspected information characterize performance operation. Based on visual inspection (VI) catalogs, our...
We present the DESI 2024 galaxy and quasar baryon acoustic oscillations (BAO) measurements using over 5.7 million unique redshifts in range 0.1<z<2.1. Divided by tracer type, we utilize 300,017 galaxies from magnitude-limited Bright Galaxy Survey with 0.1<z<0.4, 2,138,600 Luminous Red Galaxies 0.4<z<1.1, 2,432,022 Emission Line 0.8<z<1.6, 856,652 quasars 0.8<z<2.1, a ~7,500 square degree footprint. The analysis was blinded at catalog-level to avoid confirmation bias. All fiducial choices of...
ABSTRACT The 1D power spectrum P1D of the Ly α forest provides important information about cosmological and astrophysical parameters, including constraints on warm dark matter models, sum masses three neutrino species, thermal state intergalactic medium. We present first measurement with quadratic maximum likelihood estimator (QMLE) from Dark Energy Spectroscopic Instrument (DESI) survey early data sample. This sample 54 600 quasars is already comparable in size to largest previous studies,...
Abstract Baryon Acoustic Oscillations can be measured with sub-percent precision above redshift two the Lyman- α (Ly ) forest auto-correlation and its cross-correlation quasar positions. This is one of key goals Dark Energy Spectroscopic Instrument (DESI) which started main survey in May 2021. We present this paper a study contaminants to Ly are mainly caused by correlated signals introduced spectroscopic data processing pipeline as well astrophysical due foreground absorption intergalactic...