Francesco Belfiore
A5015792566- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Gamma-ray bursts and supernovae
- Diet and metabolism studies
- Spectroscopy and Laser Applications
- Metabolism, Diabetes, and Cancer
- Pancreatic function and diabetes
- Metabolism and Genetic Disorders
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Diabetes and associated disorders
- Astrophysics and Cosmic Phenomena
- Diabetes Management and Research
- Diet, Metabolism, and Disease
- Liver Disease Diagnosis and Treatment
- Diabetes, Cardiovascular Risks, and Lipoproteins
- Growth Hormone and Insulin-like Growth Factors
- Diabetes Treatment and Management
- Neurological and metabolic disorders
- Phase Equilibria and Thermodynamics
- Erythrocyte Function and Pathophysiology
- Cosmology and Gravitation Theories
- Glycogen Storage Diseases and Myoclonus
Arcetri Astrophysical Observatory
2020-2025
European Southern Observatory
2019-2022
University of California, Santa Cruz
2017-2019
University of Cambridge
2014-2018
STMicroelectronics (Italy)
2017
Ospedale Garibaldi
1987-2015
University of Catania
1989-2015
United States National Library of Medicine
2015
Institute of Immunology
2008
Witten/Herdecke University
2008
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)...
We present an overview of a new integral field spectroscopic survey called MaNGA (Mapping Nearby Galaxies at Apache Point Observatory), one three core programs in the fourth-generation Sloan Digital Sky Survey (SDSS-IV) that began on 2014 July 1. will investigate internal kinematic structure and composition gas stars unprecedented sample 10,000 nearby galaxies. summarize essential characteristics instrument design context MaNGA's key science goals prototype observations to demonstrate...
This paper documents the seventeenth data release (DR17) from Sloan Digital Sky Surveys; fifth and final fourth phase (SDSS-IV). DR17 contains complete of Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, which reached its goal surveying over 10,000 nearby galaxies. The MaNGA Stellar Library (MaStar) accompanies this data, providing observations almost 30,000 stars through instrument during bright time. also Galactic Evolution Experiment 2 (APOGEE-2) survey publicly...
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...
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,...
Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS). Here, we release data taken by fourth phase of SDSS (SDSS-IV) across its three operation (July 2014-July 2017). This is third SDSS-IV, and fifteenth from (Data Release Fifteen; DR15). New come MaNGA - 4824 datacubes, as well stellar spectra in Stellar Library (MaStar), set survey-supported analysis products (e.g. gas kinematics, emission line, other maps) Data Analysis Pipeline (DAP), a new visualisation...
We study the spatially resolved excitation properties of ionised gas in a sample 646 galaxies using integral field spectroscopy data from SDSS-IV MaNGA. Making use Baldwin-Philips-Terlevich diagnostic diagrams we demonstrate ubiquitous presence extended (kpc scale) low ionisation emission-line regions (LIERs) both star forming and quiescent galaxies. In LIER emission can be associated with diffuse gas, most evident as extra-planar edge-on systems. addition, identify two main classes...
Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) is acquiring integral-field spectroscopy for the largest sample of galaxies to date. By 2020, MaNGA Survey --- one three core programs in fourth-generation Sloan Digital Sky (SDSS-IV) will have observed a statistically representative 10$^4$ local Universe ($z\lesssim0.15$). In addition robust data-reduction pipeline (DRP), has developed data-analysis (DAP) that provides higher-level data products. To accompany first public release...
Abstract We present PHANGS–ALMA, the first survey to map CO J = 2 → 1 line emission at ∼1″ ∼100 pc spatial resolution from a representative sample of 90 nearby ( d ≲ 20 Mpc) galaxies that lie on or near z 0 “main sequence” star-forming galaxies. traces bulk distribution molecular gas, which is cold, phase interstellar medium. At achieved by each beam reaches size typical individual giant cloud, so these data can be used measure demographics, life cycle, and physical state clouds across...
We study the gas phase metallicity (O/H) and nitrogen abundance gradients traced by star-forming regions in a representative sample of 550 nearby galaxies stellar mass range 109–1011.5 M⊙ with resolved spectroscopic data from Sloan Digital Sky Survey IV Mapping Nearby Galaxies at Apache Point Observatory survey. Using strong-line ratio diagnostics (R23 O3N2 for N2O2 N/O) referencing to effective (half-light) radius (Re), we find that gradient steepens mass, lying roughly flat among log...
Diffuse ionized gas (DIG) is prevalent in star-forming galaxies. Using a sample of 365 nearly face-on galaxies observed by Mapping Nearby Galaxies at APO, we demonstrate how DIG impacts the measurements emission-line ratios, hence interpretation diagnostic diagrams and gas-phase metallicity measurements. At fixed metallicity, DIG-dominated low ΣHα regions display enhanced [S ii]/Hα, [N [O ii]/Hβ i]/Hα. The gradients these line ratios are determined ΣHα. In ratio diagrams, contamination moves...
We analyse the chemical properties of three z~8 galaxies behind galaxy cluster SMACS J0723.3-7327, observed as part Early Release Observations programme James Webb Space Telescope (JWST). Exploiting [O III]4363 auroral line detections in NIRSpec spectra, we robustly apply direct Te method for very first time at such high redshift, measuring metallicities ranging from extremely metal poor (12+log(O/H)~7) to about one-third solar. also discuss excitation these sources, and compare them with...
We present the PHANGS-MUSE survey, a programme that uses MUSE integral field spectrograph at ESO VLT to map 19 massive (9.4 < log( M ⋆ / ⊙ )< 11.0) nearby ( D ≲ 20 Mpc) star-forming disc galaxies. The survey consists of 168 pointings (1′ by 1′ each) and total nearly 15 × 10 6 spectra, covering ∼1.5 independent spectra. provides first view star formation across different local environments (including galaxy centres, bars, spiral arms) in external galaxies median resolution 50 pc, better...
Abstract The PHANGS program is building the first data set to enable multiphase, multiscale study of star formation across nearby spiral galaxy population. This effort enabled by large survey programs with Atacama Large Millimeter/submillimeter Array (ALMA), MUSE on Very Telescope, and Hubble Space Telescope (HST), which we have obtained CO(2–1) imaging, optical spectroscopic mapping, high-resolution UV–optical respectively. Here, present PHANGS-HST, has NUV– U – B V I imaging disks 38...
We use integral field spectroscopy from the PHANGS–MUSE survey, which resolves ionised interstellar medium structure at ∼50 pc resolution in 19 nearby spiral galaxies, to study origin of diffuse gas (DIG). examine physical conditions by first removing morphologically defined H II regions and then binning low-surface-brightness areas achieve significant detections key nebular lines DIG. A simple model for leakage propagation ionising radiation is able reproduce observed distribution α This...
We measure the low-J CO line ratio R21=CO(2-1)/CO(1-0), R32=CO(3-2)/CO(2-1), and R31 = CO(3-2)/CO(1-0) using whole-disk maps of nearby galaxies. draw CO(2-1) from PHANGS--ALMA, HERACLES, follow-up IRAM surveys; CO(1-0) COMING Nobeyama Atlas Nearby Spiral Galaxies; CO(3-2) JCMT NGLS APEX LASMA mapping. Altogether this yields 76, 47, 29 R21, R32, at 20" \sim 1.3 kpc resolution, covering 43, 34, 20 Disk galaxies with high stellar mass, log10 M_* [Msun]=10.25-11 star formation rate, SFR=1-5...
The PHANGS collaboration has been building a reference dataset for the multi-scale, multi-phase study of star formation and interstellar medium in nearby galaxies. With successful launch commissioning JWST, we can now obtain high-resolution infrared imaging to probe youngest stellar populations dust emission on scales clusters molecular clouds ($\sim$5-50 pc). In Cycle 1, is conducting an 8-band survey from 2-21$\mu$m 19 spiral CO(2-1) mapping, optical integral field spectroscopy, UV-optical...
Ionized nebulae provide critical insights into the conditions of interstellar medium (ISM). Their bright emission lines enable measurement physical properties, such as gas-phase metallicity, across galaxy disks and in distant galaxies. The PHANGS--MUSE survey has produced optical spectroscopic coverage central star-forming discs 19 nearby main-sequence Here, we use H{\alpha} morphology from this data to identify 30,790 distinct nebulae, finding thousands per galaxy. For each nebula, extract...
We measure empirical relationships between the local star formation rate (SFR) and properties of star-forming molecular gas on 1.5 kpc scales across 80 nearby galaxies. These relationships, commonly referred to as "star laws," aim at predicting SFR surface density from various combinations density, galactic orbital time, cloud free-fall interstellar medium dynamical equilibrium pressure. Leveraging a multiwavelength database built for PHANGS survey, we these quantities consistently all...
Abstract The PHANGS project is assembling a comprehensive, multiwavelength data set of nearby (∼5–20 Mpc), massive star-forming galaxies to enable multiphase, multiscale investigations into the processes that drive star formation and galaxy evolution. To date, large survey programs have provided molecular gas (CO) cubes with Atacama Large Millimeter/submillimeter Array, optical integral field unit (IFU) spectroscopy Very Telescope/Multi-Unit Spectroscopic Explorer (MUSE), high-resolution...
The MaNGA Survey (Mapping Nearby Galaxies at Apache Point Observatory) is one of three core programs in the Sloan Digital Sky IV. It obtaining integral field spectroscopy (IFS) for 10K nearby galaxies a spectral resolution R~2000 from 3,622-10,354A. design survey driven by set science requirements on precision estimates following properties: star formation rate surface density, gas metallicity, stellar population age, and abundance ratio, their gradients; kinematics; enclosed gravitational...
We study radial profiles in H α equivalent width and specific star formation rate (sSFR) derived from spatially resolved SDSS-IV MaNGA spectroscopy to gain insight on the physical mechanisms that suppress determine a galaxy's location SFR-M⋆ diagram. Even within star-forming 'main sequence', measured sSFR decreases with stellar mass, both an integrated sense. Flat are observed for log(M⋆/M⊙) < 10.5, while galaxies of higher mass show significant decrease central regions, likely consequence...