L. Moscardini
A5026171348- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Cosmology and Gravitation Theories
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Adaptive optics and wavefront sensing
- Astrophysical Phenomena and Observations
- Astrophysics and Star Formation Studies
- Geophysics and Gravity Measurements
- Radio Astronomy Observations and Technology
- Remote Sensing in Agriculture
- Impact of Light on Environment and Health
- Astro and Planetary Science
- History and Developments in Astronomy
- Statistical and numerical algorithms
- CCD and CMOS Imaging Sensors
- Calibration and Measurement Techniques
- Solar and Space Plasma Dynamics
- Advanced Vision and Imaging
- Spectroscopy and Chemometric Analyses
- Computational Physics and Python Applications
University of Bologna
2016-2025
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2016-2025
Osservatorio di Astrofisica e Scienza dello Spazio
2018-2025
Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
2017-2024
National Institute for Astrophysics
2012-2024
Marconi University
2023-2024
Centre National de la Recherche Scientifique
2015-2023
École Polytechnique Fédérale de Lausanne
2023
Institut National de Physique Nucléaire et de Physique des Particules
2023
Lyon College
2023
The evolution of galaxy clustering from z=0 to z≃4.5 is analysed using the angular correlation function and photometric redshift distribution galaxies brighter than IAB 28.5 in Hubble Deep Field North. reliability estimates discussed on basis available spectroscopic redshifts, comparing different codes investigating effects errors. bins which properties are measured then optimized take into account uncertainties redshifts. results show that comoving length r0 has a small decrease range 0≲z≲1...
Theoretical studies of the physical processes guiding formation and evolution galaxies galaxy clusters in X-ray are mainly based on results numerical hydrodynamical N-body simulations, which turn often directly compared to observations. Although trivial principle, these comparisons not always simple. We demonstrate that projected spectroscopic temperature thermally complex obtained from observations is lower than emission-weighed temperature, widely used analysis simulations. show this bias...
We describe the construction and general features of VIPERS, VIMOS Public Extragalactic Redshift Survey. This `Large Programme' has been using ESO VLT with aim building a spectroscopic sample ~100,000 galaxies i_{AB}<22.5 0.5
We present in this paper the general real- and redshift-space clustering properties of galaxies as measured first data release VIPERS survey. is a large redshift survey designed to probe distant Universe its large-scale structure at 0.5 < z 1.2. describe analysis global sample discuss completeness associated corrections. This allows us measure galaxy with an unprecedented accuracy these redshifts. From distortions observed pattern we provide measurement growth rate = 0.8: f\sigma_8 0.47 +/-...
We present the first Public Data Release (PDR-1) of VIMOS Extragalactic Survey (VIPERS). It comprises 57 204 spectroscopic measurements together with all additional information necessary for optimal scientific exploitation data, in particular associated photometric and quantification survey completeness. VIPERS is an ESO Large Programme designed to build a sample ' 100 000 galaxies iAB < 22.5 0.5 z 1.5 high sampling rate (~45%). The targets are selected from CFHTLS-Wide five-band catalogues...
The abundance of galaxy clusters can constrain both the geometry and growth structure in our Universe. However, this probe could be significantly complicated by recent claims nonuniversality -- non-trivial dependences with respect to cosmological model redshift. In work we analyse dependance mass function on way haloes are identified establish if cause departures from universality. order explore dependance, use a set different N-body simulations (Le SBARBINE simulations), latest parameters...
We present the full public data release (PDR-2) of VIMOS Public Extragalactic Redshift Survey (VIPERS), performed at ESO VLT. redshifts, spectra, CFHTLS magnitudes and ancillary information (as masks weights) for a complete sample 86 775 galaxies (plus 4732 other objects, including stars serendipitous galaxies); we also include their photometrically-selected parent catalogue. The is magnitude limited to i AB ≤ 22.5, with an additional colour-colour pre-selection devised as exclude z <...
We present measurements of the growth rate cosmological structure from modelling anisotropic galaxy clustering measured in final data release VIPERS survey. The analysis is carried out configuration space and based on first two even multipole moments auto-correlation function, redshift bins spanning range $0.5 < z 1.2$. provide robust cosmology-independent corrections for angular selection allowing recovery underlying amplitude at percent level down to Mpc scale. discuss several improvements...
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...
We present results on the X-ray properties of clusters and groups galaxies, extracted from a large hydrodynamical simulation. used GADGET code to simulate LambdaCDM model within box 192 Mpc/h side, with 480^3 dark matter particles as many gas particles. The simulation includes radiative cooling, star formation supernova feedback. simulated M-T relation is consistent observations once we mimic procedure for mass estimates applied real clusters. Also, adopted choices Omega_m=0.3 sigma_8=0.8...
We study the concentration parameters, their mass dependence and redshift evolution, of dark-matter halos in different dark-energy cosmologies with constant time-variable equation state, compare them "standard" ΛCDM OCDM models. find that previously proposed algorithms for predicting halo concentrations can be well adapted to When centred on analytically expected values, show a log-normal distribution uniform standard deviation ~0.2. The averaged permits simple fit form , throughout. cluster...
We present a precise estimate of the bulk virial scaling relation halos formed via hierarchical clustering in an ensemble simulated cold dark matter cosmologies. The result is insensitive to cosmological parameters; presence trace, dissipationless gas component; and numerical resolution down limit ~1000 particles. velocity dispersion scales with total mass as log [σDM(M,z)] = log(1082.9 ± 4.0 km s−1) + (0.3361 0.0026)log[h(z)M200/1015 M☉], h(z) being dimensionless Hubble parameter. At fixed...
Using the results of an extended set high-resolution non-radiative hydrodynamic simulations galaxy clusters, we obtain simple analytic formulae for dark matter and hot gas distribution, in spherical approximation. Starting from phase-space radial density derive fits density, velocity dispersion anisotropy. We use these models to test dynamical equilibrium hypothesis through Jeans equation: find that this is satisfied good accuracy by our simulated clusters inside their virial radii. This...
We examine the systematics affecting X-ray mass estimators applied to a set of five galaxy clusters resolved at high resolution in hydrodynamic simulations, including cooling, star formation and feedback processes. These simulated objects are processed through Map Simulator, X-MAS, provide Chandra-like long exposures that analysed reconstruct gas temperature, density profiles used as input. have different dynamic state: we consider hot cluster with temperature T= 11.4 keV, perturbed 3.9...
The redshifts of all cosmologically distant sources are expected to experience a small, systematic drift as function time due the evolution Universe's expansion rate. A measurement this effect would represent direct and entirely model-independent determination history Universe over redshift range that is inaccessible other methods. Here we investigate impact next generation Extremely Large Telescopes on feasibility detecting characterising cosmological drift. We consider Lyman alpha forest...
We study the characteristics of galaxy cluster samples expected from European Space Agency's Euclid satellite and forecast constraints on cosmological parameters describing a variety models. The method used in this paper, based Fisher Matrix approach, is same one to provide presented Red Book (Laureijs et al.2011). describe analytical approach compute selection function photometric spectroscopic surveys. Based function, we number parameter sets corresponding different extensions standard...
We present new constraints on the relationship between galaxies and their host dark matter haloes, measured from location of peak stellar-to-halo mass ratio (SHMR), up to most massive galaxy clusters at redshift z ∼ 0.8 over a volume nearly 0.1 Gpc3. use unique combination deep observations in CFHTLenS/VIPERS field near-UV near-IR, supplemented by ∼60 000 secure spectroscopic redshifts, analysing clustering, galaxy–galaxy lensing stellar function. interpret our measurements within halo...
The description of the abundance and clustering haloes for non-Gaussian initial conditions has recently received renewed interest, motivated by forthcoming large galaxy cluster surveys, which can potentially yield constraints order unity on non-Gaussianity parameter fNL. We present tests N-body simulations analytical formulae describing halo conditions. calibrate analytic mass function Matarrese, Verde & Jimenez LoVerde et al. simulations. find an excellent agreement between predictions if...
We present an analysis of the MUSIC-2 N-body/hydrodynamical simulations aimed at estimating expected concentration–mass relation for CLASH (Cluster Lensing and Supernova Survey with Hubble) cluster sample. study nearly 1,400 halos simulated high spatial mass resolution. shape both their density surface-density profiles fit them a variety radial functions, including Navarro–Frenk–White (NFW), generalized NFW, Einasto profiles. derive concentrations masses from these fits. produce Chandra...
We measure the evolution of galaxy stellar mass function from z=1.3 to z=0.5 using first 53,608 redshifts ongoing VIMOS Public Extragalactic Survey (VIPERS). estimate at several epochs discussing in detail amount cosmic variance affecting our estimate. find that Poisson noise and VIPERS survey are comparable with statistical uncertainties large surveys local universe. data allow us determine unprecedented accuracy high-mass tail function, which includes a significant number galaxies usually...