Graziano Rossi
A5020375409- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Mediterranean and Iberian flora and fauna
- Botany and Plant Ecology Studies
- Ecology and Vegetation Dynamics Studies
- Cosmology and Gravitation Theories
- Plant and animal studies
- Species Distribution and Climate Change
- Plant Taxonomy and Phylogenetics
- Stellar, planetary, and galactic studies
- Dark Matter and Cosmic Phenomena
- Seed Germination and Physiology
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Mycorrhizal Fungi and Plant Interactions
- Astrophysics and Cosmic Phenomena
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- Fern and Epiphyte Biology
- Plant Parasitism and Resistance
- CCD and CMOS Imaging Sensors
- Bryophyte Studies and Records
- Plant Pathogens and Fungal Diseases
- Biological Control of Invasive Species
- Plant Water Relations and Carbon Dynamics
Sejong University
2016-2025
University of Pavia
2016-2025
Universidade de São Paulo
2025
Max Planck Institute for Astrophysics
2023
University of Milano-Bicocca
2017
Institut de Recherche sur les Lois Fondamentales de l'Univers
2014-2015
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2014-2015
CEA Paris-Saclay
2014-2015
Astronomy and Space
2015
Ev-K2-Cnr
2014
In mountainous regions, climate warming is expected to shift species' ranges higher altitudes. Evidence for such shifts still mostly from revisitations of historical sites. We present recent (2001 2008) changes in vascular plant species richness observed a standardized monitoring network across Europe's major mountain ranges. Species have moved upslope on average. However, these had opposite effects the summit floras' boreal-temperate regions (+3.9 average) and Mediterranean (-1.4 species),...
We present constraints on neutrino masses, the primordial fluctuation spectrum from inflation, and other parameters of ΛCDM model, using one-dimensional Lyα-forest power measured by [1] Baryon Oscillation Spectroscopic Survey (BOSS) Sloan Digital Sky (SDSS-III), complemented Planck 2015 cosmic microwave background (CMB) data cosmological probes. This paper improves previous analysis [2] a more powerful set calibrating hydrodynamical simulations that reduces uncertainties associated with...
We analyse the clustering of Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Data Release 16 luminous red galaxy sample (DR16 eBOSS LRG) in combination with high redshift tail III 12 (DR12 BOSS CMASS). measure space distortions (RSD) and also extract longitudinal transverse baryonic acoustic oscillation (BAO) scale from anisotropic power spectrum signal inferred 377,458 galaxies between redshifts 0.6 1.0, effective $z_{\rm eff}=0.698$ comoving volume $2.72\,{\rm...
Abstract The Dark Energy Spectroscopic Instrument (DESI) survey is a spectroscopic of tens millions galaxies at 0 < z 3.5 covering 14,000 sq. deg. the sky. In its first 1.1 yr operations, it has observed more than 14 million and 4 stars. We describe processes that govern DESI’s observations 15,000 fields composing survey. This includes planning each night’s in afternoon; automatic selection to observe during night; real-time assessment field completeness on basis observing conditions...
Abstract The Dark Energy Spectroscopic Instrument (DESI) is currently measuring the spectra of 40 million galaxies and quasars, largest such survey ever made to probe nature cosmological dark energy. 4 m Mayall telescope at Kitt Peak National Observatory has been adapted for DESI, including construction a 3.°2 diameter prime focus corrector that focuses astronomical light onto 0.8 focal surface with excellent image quality over DESI bandpass 360–980 nm. wide-field includes six lenses, as...
Abstract We present the final data from Sloan Digital Sky Survey (SDSS) Reverberation Mapping (RM) project, a precursor to SDSS-V Black Hole Mapper RM program. This set includes 11 yr photometric and 7 spectroscopic light curves for 849 broad-line quasars over redshift range of 0.1 < z 4.5 luminosity L bol = 10 44−47.5 erg s −1 , along with spectral variability measurements. report 23, 81, 125, 110 lags (relative optical continuum variability) broad H α β Mg ii C iv using SDSS-RM sample,...
ABSTRACT The 1D power spectrum P1D of the Ly α forest provides important information about cosmological and astrophysical parameters, including constraints on warm dark matter models, sum masses three neutrino species, thermal state intergalactic medium. We present first measurement with quadratic maximum likelihood estimator (QMLE) from Dark Energy Spectroscopic Instrument (DESI) survey early data sample. This sample 54 600 quasars is already comparable in size to largest previous studies,...
Abstract Changing-look active galactic nuclei (CL AGNs) can be generally confirmed by the emergence (turn-on) or disappearance (turn-off) of broad emission lines (BELs), associated with a transient timescale (about 100 ∼ 5000 days) that is much shorter than predicted traditional accretion disk models. We carry out systematic CL AGN search crossmatching spectra coming from Dark Energy Spectroscopic Instrument and Sloan Digital Sky Survey. Following previous studies, we identify AGNs based on...
Baryon acoustic oscillation data from the first year of Dark Energy Spectroscopic Instrument (DESI) provide near percent-level precision cosmic distances in seven bins over redshift range $z=0.1$-$4.2$. We use this data, together with other distance probes, to constrain expansion history using some well-motivated physical classes dark energy. In particular, we explore three physics-focused behaviors energy equation state and density perspectives: thawing class (matching many simple...
Abstract In anticipation of forthcoming data releases current and future spectroscopic surveys, we present the validation tests analysis systematic effects within velocileptors modeling pipeline when fitting mock from AbacusSummit N-body simulations. We compare constraints obtained parameter compression methods to direct (Full-Modeling) approaches galaxy power spectra, show that ShapeFit extension traditional template method is consistent with Full-Modeling standard ΛCDM space. dependence on...
Abstract We present the technical details on how large-scale structure (LSS) catalogs are constructed from redshifts measured spectra observed by Dark Energy Spectroscopic Instrument (DESI). The LSS provide information needed to determine relative number density of DESI tracers as a function redshift and celestial coordinates and, e.g., clustering statistics. produce that weighted subsamples data, each matched `random' catalog forms an unclustered sampling probability could have those data...
Abstract We present an optimized way of producing the fast semi-analytical covariance matrices for Legendre moments two-point correlation function, taking into account survey geometry and mimicking non-Gaussian effects. validate approach on simulated (mock) catalogs different galaxy types, representative Dark Energy Spectroscopic Instrument (DESI) Data Release 1, used in 2024 analyses. find only a few percent differences between mock sample matrix our results, which can be expected given...
Abstract In this paper, we present the estimation of systematics related to halo occupation distribution (HOD) modeling in baryon acoustic oscillations (BAO) distance measurement Dark Energy Spectroscopic Instrument (DESI) 2024 analysis. This paper focuses on study HOD for luminous red galaxies (LRG). We consider three different models LRGs, including base 5-parameter vanilla model and two extensions it, that refer as baseline extended models. The is described by 5 parameters, an...
Abstract Baryon Acoustic Oscillations can be measured with sub-percent precision above redshift two the Lyman- α (Ly ) forest auto-correlation and its cross-correlation quasar positions. This is one of key goals Dark Energy Spectroscopic Instrument (DESI) which started main survey in May 2021. We present this paper a study contaminants to Ly are mainly caused by correlated signals introduced spectroscopic data processing pipeline as well astrophysical due foreground absorption intergalactic...
Abstract Dark Energy Spectroscopic Instrument (DESI) uses more than 2.4 million Emission Line Galaxies (ELGs) for 3D large-scale structure (LSS) analyses in its Data Release 1 (DR1). Such large statistics enable thorough research on systematic uncertainties. In this study, we focus spectroscopic systematics of ELGs. The redshift success rate ( f goodz ) is the relative fraction secure redshifts among all measurements. It depends observing conditions, thus introduces non-cosmological...
Abstract In preparation for the next generation of galaxy redshift surveys, and in particular year-one data release from Dark Energy Spectroscopic Instrument (DESI), we investigate consistency a variety effective field theory models that describe galaxy-galaxy power spectra space into quasi-linear regime using 1-loop perturbation theory. These are employed pipelines velocileptors , PyBird Folps ν . While these have been validated independently, detailed comparison with consistent choices has...
Abstract The large scale structure catalogs within DESI Data Release 1 (DR1) use nearly 6 million galaxies and quasars as tracers of the large-scale universe to measure expansion history with baryon acoustic oscillations growth redshift-space distortions. In order take advantage DESI's unprecedented statistical power, we must ensure that galaxy clustering measurements are unaffected by non-cosmological density fluctuations. One source spurious fluctuations comes from variation in...
Background and AimsPlant evolution is well known to be frequently associated with remarkable changes in genome size composition; however, the knowledge of long-term evolutionary dynamics these processes still remains very limited. Here a study made fine quantitative Festuca (fescue), largest genus Poaceae (grasses).
Despite the considerable number of studies on impacts climate change alpine plants, there have been few attempts to investigate its effect regeneration. Recruitment from seeds is a key event in life-history affecting their spread and evolution seasonal changes will inevitably affect recruitment success. Here, an investigation was made how timing level germination eight species glacier foreland. Using novel approach which considered altitudinal variation temperature as surrogate for future...