Antonello Calabrò
A5055948382- 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
- Adaptive optics and wavefront sensing
- Astronomical Observations and Instrumentation
- Celiac Disease Research and Management
- Helicobacter pylori-related gastroenterology studies
- Cosmology and Gravitation Theories
- Epoxy Resin Curing Processes
- Astrophysics and Cosmic Phenomena
- Advanced Fiber Optic Sensors
- Scientific Research and Discoveries
- Synthesis and properties of polymers
- Gastroesophageal reflux and treatments
- Photonic and Optical Devices
- Microscopic Colitis
- Inflammatory mediators and NSAID effects
- Solar and Space Plasma Dynamics
- Gut microbiota and health
- Gastrointestinal Tumor Research and Treatment
- CCD and CMOS Imaging Sensors
- Remote Sensing in Agriculture
Astronomical Observatory of Rome
2017-2025
National Institute for Astrophysics
2017-2025
University College London
2024
University of Copenhagen
2024
Flatiron Health (United States)
2024
Flatiron Institute
2024
Royal Holloway University of London
2024
University of California, Davis
2024
New York University
2024
Princeton University
2024
Autism spectrum disorders (ASDs) are neurodevelopmental conditions characterized by social and behavioural impairments. In addition to neurological symptoms, ASD subjects frequently suffer from gastrointestinal abnormalities, thus implying a role of the gut microbiota in pathophysiology. Here, we bacterial fungal cohort autistic individuals demonstrating presence an altered microbial community structure. A fraction 90% were classified as severe ASDs. We found significant increase...
Abstract We present an investigation into the first 500 Myr of galaxy evolution from Cosmic Evolution Early Release Science (CEERS) survey. CEERS, one 13 JWST ERS programs, targets formation z ∼ 0.5 to >10 using several imaging and spectroscopic modes. make use epoch CEERS NIRCam imaging, spanning 35.5 arcmin 2 , search for candidate galaxies at > 9. Following a detailed data reduction process implementing custom steps produce high-quality reduced images, we perform multiband...
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...
We present the results of a first search for galaxy candidates at z$\sim$9--15 on deep seven-bands NIRCam imaging acquired as part GLASS-JWST Early Release Science Program flanking field Frontier Fields cluster A2744. Candidates are selected via two different renditions Lyman-break technique, isolating objects z$\sim$9-11, and z$\sim$9-15, respectively, supplemented by photometric redshifts obtained with independent codes. find five color-selected z$>$9, plus one additional candidate...
The GLASS James Webb Space Telescope Early Release Science (hereafter GLASS-JWST-ERS) Program will obtain and make publicly available the deepest extragalactic data of ERS campaign. It is primarily designed to address two key science questions, namely, "what sources ionized universe when?" "how do baryons cycle through galaxies?", while also enabling a broad variety first look scientific investigations. In primary mode, it NIRISS NIRSpec spectroscopy galaxies lensed by foreground Hubble...
The fungal component of the human gut microbiota has been neglected for long time due to low relative abundance fungi with respect bacteria, and only recently few reports have explored its composition dynamics in health or disease. application metagenomics methods full understanding communities is currently limited by under representation DNA bacterial one, as well ability discriminate passengers from colonizers. Here, we investigated mycobiota a cohort healthy subjects order reduce gap...
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...
Abstract We present the data release and reduction process for Epoch 1 NIRCam observations Cosmic Evolution Early Release Science Survey (CEERS). These consist of imaging in six broadband filters (F115W, F150W, F200W, F277W, F356W F444W) one medium-band filter (F410M) over four pointings, obtained parallel with primary CEERS MIRI observations. reduced JWST Calibration Pipeline, custom modifications steps designed to address additional features challenges data. Here we provide a detailed...
Abstract We present JWST NIRSpec spectroscopy for 11 galaxy candidates with photometric redshifts of z ≃ 9 − 13 and M UV ∈ [ −21, −18] newly identified in NIRCam images the Cosmic Evolution Early Release Science Survey. confirm emission line 7 galaxies at = 7.762–8.998 using spectra ∼1–5 μ m either prism or its three medium-resolution ( R ∼ 1000) gratings. For candidates, we achieve a high confirmation rate ≃90%, which validates classical dropout selection from photometry. No robust lines...
We present JWST/NIRSpec prism spectroscopy of seven galaxies selected from the Cosmic Evolution Early Release Science Survey (CEERS) NIRCam imaging with photometric redshifts z_phot>8. measure emission line z=7.65 and 8.64 for two galaxies, z=9.77(+0.37,-0.29) 10.01(+0.14,-0.19) others via detection continuum breaks consistent Lyman-alpha opacity a mostly neutral intergalactic medium. The presence (absense) strong (strong lines) give high confidence that these are at z>9.6, but break-derived...
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,...
The new capabilities that JWST offers in the near- and mid-infrared (IR) are used to investigate unprecedented detail nature of optical/near-IR faint, mid-IR bright sources, HST-dark galaxies among them. We gather data from CEERS survey EGS, jointly with HST data, analyze spatially resolved optical-to-mid-IR spectral energy distributions (SEDs) estimate both photometric redshifts 2 dimensions stellar populations properties a pixel-by-pixel basis. select 138 F150W-F356W>1.5 mag, F356W<27.5...
Abstract We present a comprehensive analysis of the evolution morphological and structural properties large sample galaxies at z = 3–9 using early James Webb Space Telescope (JWST) CEERS NIRCam observations. Our consists 850 > 3 detected in both Hubble (HST)/WFC3 JWST/NIRCam images, enabling comparison HST JWST morphologies. conduct set visual classifications, with each galaxy classified three times. also measure quantitative morphologies across all filters. find that have wide diversity...
Abstract We present the spectroscopic confirmation of a protocluster at z = 7.88 behind galaxy cluster Abell 2744 (hereafter A2744-z7p9OD). Using JWST NIRSpec, we find seven galaxies within projected radius 60 kpc. Although reside in an overdensity around ≳20× greater than random volume, they do not show strong Ly α emission. place 2 σ upper limits on rest-frame equivalent width <16–28 Å. Based tight to emission, constrain volume-averaged neutral fraction hydrogen intergalactic medium be...
We report the detection of a high density redshift $z\approx 10$ galaxies behind foreground cluster Abell 2744, selected from imaging data obtained recently with NIRCam onboard {\it JWST} by three programs -- GLASS-JWST, UNCOVER, and DDT\#2756. To ensure robust estimates lensing magnification $\mu$, we use an improved version our model that exploits first epoch images newly MUSE spectra, avoids regions $\mu>5$ where uncertainty may be higher. detect seven bright demagnified rest-frame $-22...
Abstract We exploit James Webb Space Telescope (JWST) NIRCam observations from the GLASS-JWST-Early Release Science program to investigate galaxy stellar masses at z > 7. first show that JWST reduce uncertainties on mass by a factor of least 5–10, when compared with highest-quality data sets available date. then study UV mass-to-light ratio, finding galaxies exhibit two orders magnitude range M / L values for given luminosity, indicative broad variety physical conditions and star...
Stellar bars are key drivers of secular evolution in galaxies and can be effectively studied using rest-frame near-infrared (NIR) images, which trace the underlying stellar mass less impacted by dust star formation than UV or optical images. We leverage power {\it{JWST}} CEERS NIRCam images to present first quantitative identification characterization at $z>1$ based on NIR F444W high resolution (~1.3 kpc z ~ 1-3). identify these criteria ellipse fits. For this pilot study, we six examples...
The escape fraction of Lyman-continuum (LyC) photons ($f_{esc}$) is a key parameter for determining the sources cosmic reionization at $z\geq 6$. At these redshifts, owing to opacity intergalactic medium, LyC emission cannot be measured directly. However, leakers during epoch could identified using indirect indicators that have been extensively tested low and intermediate redshifts. These include high [OIII]/[OII] flux ratio, star-formation surface density, compact sizes. In this work, we...
Abstract We present results from the Cosmic Evolution Early Release Survey on stellar population parameters for 28 galaxies with redshifts 4 < z 9 using imaging data James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI) combined Hubble and Spitzer Telescope. The JWST/MIRI 5.6 7.7 μ m extend coverage of rest-frame spectral energy distribution to nearly 1 in this redshift range. By modeling galaxies’ SEDs MIRI show that have, average, UV (1600 Å)— I -band colors 0.4 mag bluer...
Abstract We spectroscopically confirm the M UV = −20.5 mag galaxy GHZ2/GLASS-z12 to be at redshift z 12.34. The source was selected via NIRCam photometry in GLASS-JWST Early Release Science data, providing first evidence of a surprising abundance bright galaxies ≳ 10. NIRSpec PRISM spectrum shows detections N iv , C He ii O iii and Ne lines detection high Bowen fluorescence line 3133 Å rest frame. prominent with rest-frame equivalent width (EW) ≈ 46 puts GHZ2 category extreme emitters....
Abstract We combine deep imaging data from the CEERS early release JWST survey and Hubble Space Telescope CANDELS to examine size–mass relation of star-forming galaxies morphology–quenching at stellar masses M ⋆ ≥ 10 9.5 ⊙ over redshift range 0.5 < z 5.5. In this study with a sample 2450 galaxies, we separate quiescent based on their star formation activity confirm that have different morphologies out = 5.5, extending results earlier studies higher redshifts. find typical Sérsic indices n...
The Epoch of Reionization (EoR) began when galaxies grew in abundance and luminosity, so their escaping Lyman continuum (LyC) radiation started ionizing the surrounding neutral intergalactic medium (IGM). Despite significant recent progress, nature role cosmic reionizers are still unclear: order to define them, it would be necessary directly measure LyC escape fraction ( f esc ). However, this is impossible during EoR due opacity IGM. Consequently, many efforts at low intermediate redshift...