A5015409091- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Scientific Research and Discoveries
- Radio Astronomy Observations and Technology
- Scientific Computing and Data Management
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Spectroscopy and Laser Applications
- Particle physics theoretical and experimental studies
- Big Data and Business Intelligence
- Calibration and Measurement Techniques
- Research Data Management Practices
- Spectroscopy and Chemometric Analyses
- Relativity and Gravitational Theory
- Astro and Planetary Science
- Superconducting and THz Device Technology
NSF’s NOIRLab
2020-2025
Community Science and Data Center
2020-2025
National Solar Observatory
2024-2025
U.S. National Science Foundation
2023
CEA Paris-Saclay
2012-2022
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2022
Institut de Recherche sur les Lois Fondamentales de l'Univers
2012-2022
Kitt Peak National Observatory
2011-2021
Centre National de la Recherche Scientifique
2012-2020
Université Paris Cité
2012-2020
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 deepest 100 to 500 μm far-infrared observations obtained with Herschel Space Observatory as part of GOODS-Herschel key program, and examine infrared (IR) 3–500 spectral energy distributions (SEDs) galaxies at 0 < z 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, AKARI data. determine projected star formation densities their radio mid-IR continuum sizes.
This paper provides an update of our previous scaling relations (Genzel et al.2015) between galaxy integrated molecular gas masses, stellar masses and star formation rates, in the framework main-sequence (MS), with main goal to test for possible systematic effects. For this purpose new study combines three independent methods determining from CO line fluxes, far-infrared dust spectral energy distributions, ~1mm photometry, a large sample 1444 forming galaxies (SFGs) z=0 4. The covers mass...
We combine molecular gas masses inferred from CO emission in 500 star-forming galaxies (SFGs) between z = 0 and 3, the IRAM-COLDGASS, PHIBSS1/2, other surveys, with derived Herschel far-IR dust measurements 512 galaxy stacks over same stellar mass/redshift range. constrain scaling relations of depletion timescale (tdepl) to mass ratio (Mmol gas/M*) SFGs near star formation "main-sequence" redshift, specific star-formation rate (sSFR), (M*). The CO- dust-based agree remarkably well. This...
We have investigated the mass-metallicity (M-Z) relation using galaxies at 0.4<z<1.0 from Gemini Deep Survey and Canada-France Redshift Survey. K z' band photometry allowed us to measure stellar masses for 69 galaxies. From a subsample of 56 galaxies, which metallicity interstellar medium is also measured, we identified strong correlation between mass metallicity, first time in distant Universe. This was possible because larger base line spanned by sample terms (a factor 7) 400) than...
We present an analysis of the deepest Herschel images in four major extragalactic fields GOODS-North, GOODS-South, UDS and COSMOS obtained within GOODS-Herschel CANDELS-Herschel key programs. The picture provided by 10497 individual far-infrared detections is supplemented stacking a mass-complete sample 62361 star-forming galaxies from CANDELS-HST H band-selected catalogs two deep ground-based Ks GOODS-North COSMOS-wide fields, order to obtain one most accurate unbiased understanding date...
Using HST/WFC3 imaging taken as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS), we examine role that major galaxy mergers play in triggering active galactic nuclei (AGN) activity at z~2. Our sample consists 72 moderate-luminosity (Lx ~ 1E42-1E44 erg/s) AGN 1.5<z<2.5 are selected using 4 Msec Chandra observations Field South, deepest X-ray to date. Employing visual classifications, have analyzed rest-frame optical morphologies host galaxies and compared...
Star-forming galaxies (SFGs) display a continuous distribution of specific star formation rates (sSFR) which can be approximated by the superposition two log-normal distributions. The 1st these encompasses main sequence (MS) SFGs, 2nd one rarer population starbursts (SB). We show that sSFR-distribution SBs regarded as result physical process (plausibly merging) taking mathematical form boosting kernel and enhancing activity. explore utility splitting star-forming into MS SB - an approach we...
We present the results of Near-Infrared Camera and Multi-Object Spectrometer (NICMOS) imaging a sample 19 high-mass passively evolving galaxies with 1.2 < z 2, taken primarily from Gemini Deep Survey (GDDS). Around 80% in our GDDS have spectra dominated by stars ages ≳1 Gyr. Our rest-frame R-band images show that most these objects compact regular morphologies which follow classical R1/4 law. These scatter along tight sequence size versus surface brightness parameter space defines Kormendy...
We report the discovery of a candidate galaxy with photo-z z~12 in first epoch JWST Cosmic Evolution Early Release Science (CEERS) Survey. Following conservative selection criteria we identify source robust z_phot = 11.8^+0.3_-0.2 (1-sigma uncertainty) m_F200W=27.3, and >7-sigma detections five filters. The is not detected at lambda < 1.4um deep imaging from both HST JWST, has faint ~3-sigma F150W F160W, which signal Ly-alpha break near red edge filters, implying z~12. This object (Maisie's...
Using X-ray stacking analyses we estimate the average amounts of supermassive black hole (SMBH) growth taking place in star-forming galaxies (SFGs) at z~1 and z~2 as a function galaxy stellar mass (M*). We find SMBH rate follows remarkably similar trends with M* redshift star-formation rates (SFRs) their host (i.e., dM_BH/dt ~ M*^(0.86+/-0.39) for sample M*^(1.05+/-0.36) sample). It that ratio to SFR is (a) flat respect (b) not evolving (c) close required maintain/establish ~10^{-3} also...
We use deep panchromatic datasets in the GOODS-N field, from GALEX to deepest Herschel far-infrared and VLA radio continuum imaging, explore, using mass-complete samples, evolution of star formation activity dust attenuation star-forming galaxies z~4. Our main results can be summarized as follows: i) slope SFR-M correlation is consistent with being constant, equal ~0.8 at least up z~1.5, while its normalization keeps increasing redshift; ii) for first time here we are able explore FIR-radio...
Abstract We report the discovery of an accreting supermassive black hole at z = 8.679. This galaxy, denoted here as CEERS_1019, was previously discovered a Ly α -break galaxy by Hubble with redshift from Keck. As part Cosmic Evolution Early Release Science (CEERS) survey, we have observed this source JWST/NIRSpec, MIRI, NIRCam, and NIRCam/WFSS uncovered plethora emission lines. The H β line is best fit narrow plus broad component, where latter measured 2.5 σ FWHM ∼1200 km s −1 . conclude...
We present a 69 arcmin$^2$ ALMA survey at 1.1mm, GOODS-ALMA, matching the deepest HST-WFC3 H-band part of GOODS-South field. taper 0"24 original image with homogeneous and circular synthesized beam 0"60 to reduce number independent beams - thus reducing purely statistical spurious detections optimize sensitivity point sources. extract catalogue galaxies selected by identify sources without HST counterparts down 5$\sigma$ limiting depth H=28.2 AB (HST/WFC3 F160W). detects 20 brighter than 0.7...
Abstract We report on the discovery of two low-luminosity, broad-line active galactic nuclei (AGNs) at z > 5 identified using JWST NIRSpec spectroscopy from Cosmic Evolution Early Release Science (CEERS) survey. detect broad H α emission in spectra both sources, with FWHM 2060 ± 290 km s −1 and 1800 200 , resulting virial black hole (BH) masses that are 1–2 dex below those existing samples luminous quasars 5. The first source, CEERS 2782 = 5.242, is 2–3 fainter than known similar...
We present cosmological results from the measurement of baryon acoustic oscillations (BAO) in galaxy, quasar and Lyman-$\alpha$ forest tracers first year observations Dark Energy Spectroscopic Instrument (DESI), to be released DESI Data Release 1. BAO provide robust measurements transverse comoving distance Hubble rate, or their combination, relative sound horizon, seven redshift bins over 6 million extragalactic objects range $0.1<z<4.2$. data alone are consistent with standard flat...
Abstract Over the next 5 yr, Dark Energy Spectroscopic Instrument (DESI) will use 10 spectrographs with 5000 fibers on 4 m Mayall Telescope at Kitt Peak National Observatory to conduct first Stage IV dark energy galaxy survey. At z < 0.6, DESI Bright Galaxy Survey (BGS) produce most detailed map of universe during dark-energy-dominated epoch redshifts >10 million galaxies spanning 14,000 deg 2 . In this work, we present and validate final BGS target selection survey design. From Legacy...
Abstract The Dark Energy Spectroscopic Instrument (DESI) survey will measure large-scale structures using quasars as direct tracers of dark matter in the redshift range 0.9 < z 2.1 and Ly α forests quasar spectra at > 2.1. We present several methods to select candidate for DESI, input photometric imaging three optical bands ( g , r ) from DESI Legacy Imaging Surveys two infrared (W1, W2) Wide-field Infrared Survey Explorer. These were extensively tested during Validation DESI. In this...
Lyman Break Galaxy (LBG) candidates at z>10 are rapidly being identified in JWST/NIRCam observations. Due to the (redshifted) break produced by neutral hydrogen absorption of rest-frame UV photons, these sources expected drop out bluer filters while well detected redder filters. However, here we show that dust-enshrouded star-forming galaxies lower redshifts (z<7) may also mimic near-infrared (near-IR) colors LBGs, representing potential contaminants LBG candidate samples. First, analyze...
We present rest-frame optical emission-line flux ratio measurements for five $z>5$ galaxies observed by the JWST Near-Infared Spectrograph (NIRSpec) in SMACS 0723 Early Release Observations. add several quality-control and post-processing steps to NIRSpec pipeline reduction products order ensure reliable relative calibration of emission lines that are closely separated wavelength, despite uncertain \textit{absolute} spectrophotometry current version reductions. Compared $z\sim3$ literature,...
Abstract The Dark Energy Spectroscopic Instrument (DESI) survey is a spectroscopic of tens millions galaxies at 0 < z 3.5 covering 14,000 sq. deg. the sky. In its first 1.1 yr operations, it has observed more than 14 million and 4 stars. We describe processes that govern DESI’s observations 15,000 fields composing survey. This includes planning each night’s in afternoon; automatic selection to observe during night; real-time assessment field completeness on basis observing conditions...
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 In 2022 November, the James Webb Space Telescope (JWST) returned deep near-infrared images of A2744—a powerful lensing cluster capable magnifying distant, incipient galaxies beyond it. Together with existing Hubble (HST) imaging, this publicly available data set opens a fundamentally new discovery space to understand remaining mysteries formation and evolution across cosmic time. work, we detect measure some 60,000 objects 49 arcmin 2 JWST footprint down 5 σ limiting magnitude ∼30...
Abstract In this paper we describe the survey design for Ultradeep NIRSpec and NIRCam Observations before Epoch of Reionization (UNCOVER) Cycle 1 JWST Treasury program, which executed its early imaging component in 2022 November. The UNCOVER includes ultradeep (∼29–30AB) ∼45 arcmin 2 on around well-studied A2744 galaxy cluster at z = 0.308 will follow up ∼500 galaxies with extremely deep low-resolution spectroscopy NIRSpec/PRISM during summer 2023, repeat visits 2024. We science goals,...