A5045018438- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Stellar, planetary, and galactic studies
- Adaptive optics and wavefront sensing
- Astrophysics and Star Formation Studies
- Helicobacter pylori-related gastroenterology studies
- Gastroesophageal reflux and treatments
- Gastric Cancer Management and Outcomes
- Gastrointestinal disorders and treatments
- Gastrointestinal Bleeding Diagnosis and Treatment
- Microscopic Colitis
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Inflammatory Bowel Disease
- Pharmacological Effects of Natural Compounds
- Colorectal Cancer Screening and Detection
- Liver Disease Diagnosis and Treatment
- Simulation Techniques and Applications
- Cardiovascular, Neuropeptides, and Oxidative Stress Research
- Apelin-related biomedical research
- Hormonal Regulation and Hypertension
- Folate and B Vitamins Research
- Spacecraft Design and Technology
- Veterinary medicine and infectious diseases
- Mycobacterium research and diagnosis
Ghent University
2023-2024
Osservatorio Astronomico di Padova
2021-2023
University of Padua
2021-2022
University of Salerno
2015
University of Naples Federico II
1989
From an Italian Registry of patients with upper gastrointestinal hemorrhage (UGIH), we assessed the clinical outcomes and explored roles clinical, endoscopic, therapeutic factors on 30-day mortality in a real life setting.Prospective analysis consecutive endoscoped for UGIH at 23 community tertiary care institutions from 2003 to 2004. Covariates were defined priori follow-up obtained. Logistic regression identified predictors mortality.One thousand twenty included. A total 46 died overall...
Summary Background The most commonly used second‐line Helicobacter pylori eradication regimens are bismuth‐containing quadruple therapy and levofloxacin‐containing triple therapy, both offering suboptimal results. Combining bismuth levofloxacin may enhance the efficacy of rescue regimens. Aims To evaluate tolerability a regimen containing in patients whose previous H. treatment failed. Methods This was prospective multicenter study including whom standard ( PPI –clarithromycin–amoxicillin)...
In the past years, we have undertaken an extensive investigation of LMC and SMC star clusters based on HST data. We present photometry astrometry stars in 101 fields observed with WFC/ACS, UVIS/WFC3 NIR/WFC3 cameras. These comprise 113 clusters. provide differential-reddening maps illustrate various scientific outcomes that arise from early inspection photometric catalogs. particular, new insights extended main-sequence turn-off (eMSTO) phenomenon: i) detected eMSTOs two clusters, KMHK361...
The UVJ color-color diagram is a widely used diagnostic to separate star-forming and quiescent galaxies. Observational data from photometric surveys reveal strong stellar mass trend, with higher-mass galaxies being systematically more dust-reddened. We analyze the in TNG100 cosmological simulation at cosmic noon (z≈2). Specifically, we focus on trend between colors mass, which has not been reproduced any thus far. applied SKIRT dust radiative transfer code generate rest-frame fluxes. These...
Abstract We use CEERS JWST/NIRCam imaging to measure rest-frame near-IR light profiles of 435 M ⋆ > 10 ⊙ galaxies in the redshift range 0.5 < z 2.3. compare resulting 1.5–2 μ m half-light radii ( R NIR ) with stellar half-mass <?CDATA ${R}_{{{M}}_{\star }}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>R</mml:mi> </mml:mrow> <mml:mi mathvariant="italic">M</mml:mi> <mml:mo>⋆</mml:mo> </mml:msub> </mml:math> derived multicolor...
Galaxy sizes correlate with many other important properties of galaxies, and the cosmic evolution galaxy is an observational diagnostic for constraining models. The effective radius probably most widely used indicator size. We TNG50-SKIRT Atlas to investigate wavelength dependence galaxies at optical near-infrared (NIR) wavelengths. find that, on average, in every band exceeds stellar mass radius, that this excess systematically decreases increasing wavelength. g -band (NIR K s -band)...
Abstract We present individual star formation histories (SFHs) of ∼3000 massive galaxies (log( M * / ⊙ ) > 10.5) from the Large Early Galaxy Astrophysics Census spectroscopic survey at a lookback time ∼7 billion yr and quantify population trends leveraging 20 hr deep-integrated spectra these ∼1800 star-forming ∼1200 quiescent 0.6 < z 1.0. Essentially all this epoch contain stars age <3 Gyr, in contrast with older today, facilitating better recovery previous generations cosmic noon...
Abstract We examine the wavelength dependence of radial light profiles based on Sérsic index n measurements 1067 galaxies with M * ≥ 10 9.5 ⊙ and in redshift range 0.5 < z 3. The sample rest-frame optical are drawn from Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey (CANDELS) 3D Hubble Space Telescope (HST); near-infrared inferred images collected for Evolution Early Release Science (CEERS) program Near Infrared Camera (NIRCam) board James Webb (JWST). shows only a weak...
Galaxy morphology is a powerful diagnostic to assess the realism of cosmological hydrodynamical simulations. Determining simulated galaxies requires generation synthetic images through 3D radiative transfer post-processing that properly accounts for different stellar populations and interstellar dust attenuation. We use SKIRT code generate TNG50-SKIRT Atlas, UV near-infrared broadband image atlas complete stellar-mass selected sample 1154 extracted from TNG50 simulation at z = 0. The have...
Abstract We present the galaxy stellar mass–size relation in rest-frame near-IR (1.5 μ m) and its evolution with redshift up to z = 2.5. Sérsic profiles are measured for ∼26,000 galaxies masses M ⋆ > 10 9 ⊙ from JWST/NIRCam F277W F444W imaging provided by COSMOS-WEB PRIMER surveys using coordinates, redshifts, colors, mass estimates COSMOS2020 catalog. The new effective radii generally smaller than previously optical sizes, on average 0.14 dex, no significant dependence redshift. For...
Abstract Background Bismuth quadruple (BQT) and non‐bismuth (N‐BQT) therapies are the recommended first‐line treatments for Helicobacter (H.) pylori infection. Objective To compare efficacy of BQT N‐BQT in clinical practice an area with high clarithromycin resistance, choosing regimen on basis previous exposure to clarithromycin. Methods A total 404 consecutive H ‐positive, naïve patients were enrolled. 203 without received N‐BQT, 100 10 days 103 14 days, whereas 201 10‐day BQT. Efficacy...
Recent work has shown that NIR Hubble Space Telescope (HST) photometry allows us to disentangle multiple populations (MPs) among M dwarfs of globular clusters (GCs) and investigate this phenomenon in very low-mass (VLM) stars. Here, we present the color-magnitude diagrams (CMDs) nine GCs open cluster NGC 6791 F110W F160W bands HST, showing main sequences (MSs) below knee are either broadened or split thus providing evidence MPs VLM In contrast, MS is consistent with a single population. The...
The James Webb Space Telescope (JWST) is unveiling the rest-frame near-IR structure of galaxies. We measure evolution with redshift optical and S\'ersic index ($n$), examine dependence on stellar mass star-formation activity across range $0.5\leq z\leq2.5$. infer profiles for $\approx 15.000$ galaxies in publicly available NIRCam imaging mosaics from COSMOS-Web PRIMER surveys. augment these indices, previously measured HST mosaics. median evolves slowly or not at all redshift, except very...
The Hubble Space Telescope (HST) has long been the only instrument able to allow us investigate structure of galaxies up redshift z=3, limited rest-frame UV and optical. James Webb (JWST) is now unveiling near-IR galaxies, less affected by dust attenuation more representative their underlying stellar mass profiles. We measure evolution with optical S'ersic index (n), examine dependence on star-formation activity across range $0.5≤ z≤2.5$. For an HST-selected parent sample in CANDELS fields...
Context. The UVJ color-color diagram is a widely used diagnostic to separate star-forming and quiescent galaxies. Observational data from photometric surveys reveal strong stellar mass trend, with higher-mass galaxies being systematically more dust-reddened. Aims. We analyze the in TNG100 cosmological simulation at cosmic noon ($z\approx2$). Specifically, we focus on trend between colors which has so far not been reproduced any simulation. Methods. apply SKIRT dust radiative transfer code...
We present the stellar properties of 2908 galaxies at 0.6 < z 1.0 from LEGA-C survey. emphasize importance high signal-to-noise, spectral resolution spectroscopy in inference population galaxies. estimate galaxy with SED fitting code Prospector, by and broadband photometry together, drawn DR3 UltraVISTA catalogs respectively. report a positive correlation between light-weighted ages velocity dispersion ($\sigma_\star$). The trend $\sigma_\star$ is weaker for mass-weighted metallicity...
We present the stellar properties of 2908 galaxies (1208 quiescent and 1700 star forming) at $0.6 < z 1.0$ from Large Early Galaxy Astrophysics Census (LEGA-C) survey. emphasize importance high signal-to-noise, spectral resolution spectroscopy in inference population galaxies. estimated galaxy with Bayesian energy distribution (SED) framework Prospector . fit broadband photometry together, drawn LEGA-C DR3 UltraVISTA catalogs, respectively. report a positive correlation between...
We present an observational study of the dark matter fraction in star-forming disk-like galaxies up to redshift z ∼ 2.5 selected from publicly available integral field spectroscopic surveys: KMOS^ 3D, KGES, and KROSS. To model Hα kinematics these galaxies, we employed 3D forward modeling, which incorporates beam-smearing inclination corrections yields rotation curves. Subsequently, corrected curves for gas pressure gradients, resulting circular velocity or `intrinsic' Our final sample...
Aims . We test whether we can predict optical spectra from deep-field photometry of distant galaxies. Our goal is to perform a comparison in data space, highlighting the differences between predicted and observed spectra. Methods The Large Early Galaxy Astrophysics Census (LEGA-C) provides high-quality thousands galaxies at redshift 0.6 < z 1. Broadband same galaxies, drawn recent COSMOS2020 catalog, used with spectral energy distribution (SED) fitting code Prospector MILES stellar...
ABSTRACT We present and publicly release a new star-forming regions emission library TODDLERS (Time evolution of Observables including Dust Diagnostics Line Emission from Regions containing young Stars) for the available radiative transfer code SKIRT. The generation involves spherical homogeneous gas cloud around stellar cluster that accounts feedback processes winds, supernovae, radiation pressure, as well gravitational forces on gas. semi-analytical model is coupled with photoionization...