M. Brescia
A5005388897- Astronomy and Astrophysical Research
- Galaxies: Formation, Evolution, Phenomena
- Astronomical Observations and Instrumentation
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Cosmology and Gravitation Theories
- Adaptive optics and wavefront sensing
- Remote Sensing in Agriculture
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- CCD and CMOS Imaging Sensors
- Astrophysics and Star Formation Studies
- Astrophysical Phenomena and Observations
- Advanced Computational Techniques and Applications
- Spectroscopy and Chemometric Analyses
- Distributed and Parallel Computing Systems
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Neutrino Physics Research
- Advanced Vision and Imaging
- Calibration and Measurement Techniques
- History and Developments in Astronomy
- Astro and Planetary Science
- Impact of Light on Environment and Health
- Statistical and numerical algorithms
Astronomical Observatory of Capodimonte
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2007-2025
University of Naples Federico II
2007-2024
National Institute for Astrophysics
2003-2024
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
The Euclid space telescope will measure the shapes and redshifts of galaxies to reconstruct expansion history Universe growth cosmic structures. Estimation expected performance experiment, in terms predicted constraints on cosmological parameters, has so far relied different methodologies numerical implementations, developed for observational probes their combination. In this paper we present validated forecasts, that combine both theoretical expertise probes. This is presented provide...
The Kilo-Degree Survey (KiDS) is an optical wide-field imaging survey carried out with the VLT Telescope and OmegaCAM camera. KiDS will image 1500 square degrees in four filters (ugri), together its near-infrared counterpart VIKING produce deep photometry nine bands. Designed for weak lensing shape photometric redshift measurements, core science driver of mapping large-scale matter distribution Universe back to a ~0.5. Secondary cases are manifold, covering topics such as galaxy evolution,...
Euclid is an ESA mission designed to constrain the properties of dark energy and gravity via weak gravitational lensing galaxy clustering. It will carry out a wide area imaging spectroscopy survey (EWS) in visible near-infrared, covering roughly 15,000 square degrees extragalactic sky on six years. The wide-field telescope instruments are optimized for pristine PSF reduced straylight, producing very crisp images. This paper presents building reference survey: sequence pointings EWS, Deep...
We present a new, updated version of the EuclidEmulator (called EuclidEmulator2), fast and accurate predictor for nonlinear correction matter power spectrum. Percent-level emulation is now supported in eight-dimensional parameter space $w_0w_a$CDM$+\sum m_\nu$models between redshift $z=0$ $z=3$ spatial scales within range 0.01 $h$/Mpc $\leq k \leq$ 10 $h$/Mpc. In order to achieve this level accuracy, we have had improve quality underlying N-body simulations used as training data: (1) use...
Calibrating the photometric redshifts of >10^9 galaxies for upcoming weak lensing cosmology experiments is a major challenge astrophysics community. The path to obtaining required spectroscopic training and calibration daunting, given anticipated depths surveys difficulty in secure some faint galaxy populations. Here we present an analysis problem based on self-organizing map, method mapping distribution data high-dimensional space projecting it onto lower-dimensional representation. We...
Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 $\mu$m. We present band-merged catalogue spatially matched sources their properties derived from fits to spectral energy distributions (SEDs) heliocentric distances, based on photometric catalogs presented Molinari et al. (2016a), covering portion plane $-71.0^{\circ}< \ell < 67.0^{\circ}$. The contains 100922 regular SED, 24584 which show $\mu$m counterpart are...
We use an unprecedented data-set of about 600 redshifts for cluster members, obtained as part a VLT/VIMOS large programme, to constrain the mass profile z=0.44 MACS J1206.2-0847 over radial range 0-5 Mpc (0-2.5 virial radii) using MAMPOSSt and Caustic methods. then add external constraints from our previous gravitational lensing analysis. invert Jeans equation obtain velocity-anisotropy profiles members. With mass-density we first determination pseudo-phase-space density profile. The...
Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at VLT Telescope. It aims to image 1500 square degrees in four filters (ugri). core science driver mapping large-scale matter distribution Universe, using weak lensing shear and photometric redshift measurements. Further cases include galaxy evolution, Milky Way structure, detection of high-redshift clusters, finding rare sources such as strong lenses quasars.
Euclid will be the first space mission to survey most of extragalactic sky in 0.95-2.02 $\mu$m range, a 5$\sigma$ point-source median depth 24.4 AB mag. This unique photometric data set find wide use beyond Euclid's core science. In this paper, we present accurate computations Y_E, J_E and H_E passbands used by Near-Infrared Spectrometer Photometer (NISP), associated system. We pay particular attention passband variations field view, accounting among others for spatially variable filter...
We investigate the importance of lensing magnification for estimates galaxy clustering and its cross-correlation with shear photometric sample Euclid. Using updated specifications, we study impact on constraints shift in estimation best fitting cosmological parameters that expect if this effect is neglected. follow prescriptions official Euclid Fisher matrix forecast analysis combination cosmic shear. The slope luminosity function (local count slope), which regulates amplitude magnification,...
Recent cosmic shear studies have shown that higher-order statistics (HOS) developed by independent teams now outperform standard two-point estimators in terms of statistical precision thanks to their sensitivity the non-Gaussian features large-scale structure. The aim Higher-Order Weak Lensing Statistics (HOWLS) project is assess, compare, and combine constraining power ten different HOS on a common set $Euclid$-like mocks, derived from N-body simulations. In this first paper HOWLS series,...
This paper presents the specification, design, and development of Visible Camera (VIS) on European Space Agency's mission. VIS is a large optical-band imager with field view 0.54 deg$^2$ sampled at an array 609 Megapixels spatial resolution . It will be used to survey approximately 14 000 extragalactic sky measure distortion galaxies in redshift range $z=0.1$--1.5 resulting from weak gravitational lensing, one two principal cosmology probes leveraged by With photometric redshifts,...
will provide deep near-infrared (NIR) imaging to ∼26.5 AB magnitude over ∼59 deg^2 in its and auxiliary fields. The Cosmic DAWN survey combines dedicated archival UV--NIR observations matched depth multiwavelength of the consistently measured NIR-selected photometric catalogues, accurate redshifts, measurements galaxy properties a redshift z∼ 10. catalogues include Spitzer IRAC data that are critical for stellar mass at z ≳ 2.5 high-z science. These complement standard which not data. In...
MLPQNA stands for Multi Layer Perceptron with Quasi Newton Algorithm and it is a machine learning method which can be used to cope regression classification problems on complex massive data sets. In this paper we give the formal description of present results its application evaluation photometric redshifts quasars. The set experiment was obtained by merging four different surveys (SDSS, GALEX, UKIDSS WISE), thus covering wide range wavelengths from UV mid-infrared. able i) achieve very high...
Aims. We aim constrain the assembly history of clusters by studying intracluster light (ICL) properties, estimating its contribution to fraction baryons in stars, f∗, and understanding possible systematics or bias using different ICL detection techniques.
Forthcoming large photometric surveys for cosmology require precise and accurate redshift (photo- z ) measurements the success of their main science objectives. However, to date, no method has been able produce photo- s at required accuracy using only broad-band photometry that those will provide. An assessment strengths weaknesses current methods is a crucial step in eventual development an approach meet this challenge. We report on performance 13 code single value estimates probability...
Context. The analysis of galaxy properties, such as stellar masses, colors, sizes and morphologies, the relations among them environment, in which galaxies reside, can be used to investigate physical processes driving evolution.
Abstract Many scientific investigations of photometric galaxy surveys require redshift estimates, whose uncertainty properties are best encapsulated by (photo-z) posterior probability density functions (PDFs). A plethora photo-z PDF estimation methodologies abound, producing discrepant results with no consensus on a preferred approach. We present the comprehensive experiment comparing twelve algorithms applied to mock data produced forLarge Synoptic Survey Telescope The Rubin Observatory...
We present a machine-learning photometric redshift (ML photo- z ) analysis of the Kilo-Degree Survey Data Release 3 (KiDS DR3), using two neural-network based techniques: ANNz2 and MLPQNA. Despite limited coverage spectroscopic training sets, these ML codes provide s quality comparable to, if not better than, those from Bayesian Photometric Redshift (BPZ) code, at least up to phot ≲ 0.9 r 23.5. At bright end 20, where very complete data overlapping with KiDS are available, performance...
A variety of fundamental astrophysical science topics require the determination very accurate photometric redshifts (photo-z's). wide plethora methods have been developed, based either on template models fitting or empirical explorations parameter space. Machine learning techniques are not explicitly dependent physical priors and able to produce photo-z estimations within ranges derived from spectroscopic training set. These estimates, however, easy characterize in terms a Probability...
The recent data collected by {\it Herschel} have confirmed that interstellar structures with filamentary shape are ubiquitously present in the Milky Way. Filaments thought to be formed several physical mechanisms acting from large Galactic scales down sub-pc fractions of molecular clouds, and they might represent a possible link between star formation large-scale structure Galaxy. In order study this potential link, statistically significant sample filaments spread throughout Galaxy is...
We provide predictions of the yield $7<z<9$ quasars from Euclid wide survey, updating calculation presented in Red Book several ways. account for revisions to near-infrared filter wavelengths; we adopt steeper rates decline quasar luminosity function (QLF; $\Phi$) with redshift, $\Phi\propto10^{k(z-6)}$, $k=-0.72$, and a further rate decline, $k=-0.92$; use better models contaminating populations (MLT dwarfs compact early-type galaxies); an improved Bayesian selection method, compared colour...
The combination and cross-correlation of the upcoming $Euclid$ data with cosmic microwave background (CMB) measurements is a source great expectation since it will provide largest lever arm epochs, ranging from recombination to structure formation across entire past light cone. In this work, we present forecasts for joint analysis CMB on cosmological parameters standard model some its extensions. This work expands complements recently published based $Euclid$-specific probes, namely galaxy...
We present a new infrared survey covering the three Euclid deep fields and four other calibration using Spitzer's Infrared Array Camera (IRAC). have combined these observations with all relevant IRAC archival data of in order to produce deepest possible mosaics regions. In total, represent nearly 11% total Spitzer mission time. The resulting cover approximately 71.5deg$^2$ 3.6 4.5um bands, 21.8deg$^2$ 5.8 8um bands. They reach at least 24 AB magnitude (measured sigma, 2.5 arcsec aperture)...