S. Zibetti
A5050629882- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Adaptive optics and wavefront sensing
- Remote Sensing in Agriculture
- Astrophysics and Cosmic Phenomena
- Spectroscopy and Laser Applications
- Plant Water Relations and Carbon Dynamics
- Radio Astronomy Observations and Technology
- CCD and CMOS Imaging Sensors
- Calibration and Measurement Techniques
- Cosmology and Gravitation Theories
- Pulsars and Gravitational Waves Research
- Scientific Research and Discoveries
- Photocathodes and Microchannel Plates
- Scientific Measurement and Uncertainty Evaluation
- Image Enhancement Techniques
- Advanced Fluorescence Microscopy Techniques
- Color Science and Applications
- Impact of Light on Environment and Health
- Image and Signal Denoising Methods
Arcetri Astrophysical Observatory
2015-2024
University of Florence
2024
National Institute for Astrophysics
2012-2017
University of Chile
2015
University of Copenhagen
2010-2014
Université Paris Cité
2014
Centre National de la Recherche Scientifique
2014
Galaxies, Etoiles, Physique et Instrumentation
2014
Aix-Marseille Université
2014
Max Planck Institute for Astronomy
2007-2011
We present here the Calar Alto Legacy Integral Field Area (CALIFA) survey, which has been designed to provide a first step in this direction.We summarize survey goals and design, including sample selection observational strategy.We also showcase data taken during observing runs (June/July 2010) outline reduction pipeline, quality control schemes general characteristics of reduced data. This is obtaining spatially resolved spectroscopic information diameter selected $\sim600$ galaxies Local...
(Abridged) We introduce a novel technique to construct spatially resolved maps of stellar mass surface density in galaxies based on optical and near IR imaging. use optical/NIR colour(s) infer effective mass-to-light ratios (M/L) at each pixel, which are then multiplied by the brightness obtain local density. build look-up tables express M/L as function marginalizing over Monte Carlo library 50,000 population synthesis (SPS) models Charlot & Bruzual (2007), include revised prescription...
We analyse the spatial distribution and colour of intracluster light (ICL) in 683 clusters galaxies between z= 0.2 0.3, selected from ∼1500 deg2 first data release Sloan Digital Sky Survey (SDSS-DR1). Surface photometry g– , r- i-bands is conducted on stacked images clusters, after rescaling them to same metric size masking out resolved sources. are able trace average surface brightness (SB) profile ICL 700 kpc, where it less than 10−4 mean dark night sky. The appears as a clear excess with...
Within the hierarchical framework for galaxy formation, minor merging and tidal interactions are expected to shape all large galaxies present day. As a consequence, most seemingly normal disk should be surrounded by spatially extended stellar "tidal features" of low surface brightness. part pilot survey such interaction signatures, we have carried out ultra deep, wide field imaging eight isolated spiral in Local Volume, with data taken at small (D = 0.1–0.5 m) robotic telescopes that provide...
The KINGFISH project (Key Insights on Nearby Galaxies: a Far-Infrared Survey with Herschel) is an imaging and spectroscopic survey of 61 nearby (d < 30 Mpc) galaxies, chosen to cover wide range galaxy properties local interstellar medium (ISM) environments found in the universe. Its broad goals are characterize ISM present-day heating cooling their gaseous dust components, better understand physical processes linking star formation ISM. direct descendant Spitzer Infrared Galaxies (SINGS),...
This paper characterizes the radial structure of stellar population properties galaxies in nearby universe, based on 300 from CALIFA survey. The sample covers a wide range Hubble types, and galaxy mass. We apply spectral synthesis techniques to recover mass surface density, extinction, light mass-weighted ages, metallicity, for each spatial resolution element our target galaxies. To study mean trends with overall properties, individual profiles are stacked seven bins morphology. confirm that...
New far-infrared and sub-millimeter photometry from the Herschel Space Observatory is presented for 61 nearby galaxies Key Insights on Nearby Galaxies: A Far-Infrared Survey with (KINGFISH) sample. The spatially-integrated fluxes are largely consistent expectations based Spitzer extrapolations to longer wavelengths using popular dust emission models. Dwarf irregular notable exceptions, as already noted by other authors, their 500um shows evidence a excess. In addition, fraction of heating...
We present the first public data release of CALIFA survey. It consists science-grade optical datacubes for 100 eventually 600 nearby (0.005<z<0.03) galaxies, obtained with integral-field spectrograph PMAS/PPak mounted on 3.5m telescope at Calar Alto observatory. The galaxies in DR1 already cover a wide range properties color-magnitude space, morphological type, stellar mass, and gas ionization conditions. This offers potential to tackle variety open questions galaxy evolution using spatially...
This paper describes the third public data release (DR3) of Calar Alto Legacy Integral Field Area (CALIFA) survey. Science-grade quality for 667 galaxies are made public, including 200 second (DR2). Data were obtained with integral-field spectrograph PMAS/PPak mounted on 3.5 m telescope at Observatory. Three different spectral setups available: i) a low-resolution V500 setup covering wavelength range 3745–7500 Å (4240–7140 unvignetted) resolution 6.0 (FWHM) 646 galaxies, ii)...
This paper describes the Second Public Data Release (DR2) of Calar Alto Legacy Integral Field Area (CALIFA) survey. The data for 200 objects are made public, including 100 galaxies First (DR1). were obtained with integral-field spectrograph PMAS/PPak mounted on 3.5 m telescope at observatory. Two different spectral setups available each galaxy, (i) a low-resolution V500 setup covering wavelength range 3745-7500 \AA\ resolution 6.0 (FWHM), and (ii) medium-resolution V1200 3650-4840 2.3...
We combine new Herschel/SPIRE sub-millimeter observations with existing multiwavelength data to investigate the dust scaling relations of Herschel Reference Survey, a magnitude-, volume-limited sample ~300 nearby galaxies in different environments. show that dust-to-stellar mass ratio anti-correlates stellar mass, surface density and NUV-r colour across whole range parameters covered by our sample. Moreover, decreases significantly when moving from late- early-type galaxies. These are...
We describe and discuss the selection procedure statistical properties of galaxy sample used by Calar Alto Legacy Integral Field Area Survey (CALIFA), a public legacy survey 600 galaxies using integral field spectroscopy. The CALIFA "mother sample" was selected from Sloan Digital Sky (SDSS) DR7 photometric catalogue to include all with an r-band isophotal major axis between 45" 79.2" redshift 0.005 < z 0.03. mother contains 939 objects, which will be observed in course survey. targets for...
[abridged] We derive photometric redshifts from 17-band optical to mid-IR photometry of 74 robust counterparts 68 the 126 submillimetre galaxies (SMGs) selected at 870um by LABOCA observations in ECDFS. The median redshift identified SMGs is z=2.2\pm0.1, interquartile range z=1.8-2.7 and we identify 10 (~15%) high-redshift (z>3) SMGs. a simple estimator for based on 3.6 8um fluxes, which accurate Delta_z~0.4 z<4. A statistical analysis sources around unidentified identifies population...
The stellar populations of intermediate-redshift galaxies can shed light onto the growth massive in last 8 billion years. We perform deep, multi-object rest-frame optical spectroscopy with IMACS/Magellan ~70 E-CDFS redshift 0.65<z<0.75, apparent magnitude R>22.7 and mass >10^{10}Msun. Following Bayesian approach adopted for previous low-redshift studies, we constrain mass, mean age metallicity individual from absorption features. characterize first time dependence on at z~0.7 all quiescent...
The influence of a galaxy's environment on its evolution has been studied and compared extensively in the literature, although differing techniques are often used to define environment. Most methods fall into two broad groups: those that use nearest neighbours probe underlying density field fixed apertures. differences between inhibit clean comparison analyses leave open possibility that, even with same data, different properties actually being measured. In this work we apply twenty...
We describe the Herschel Virgo Cluster Survey (HeViCS) and first data obtained as part of Science Demonstration Phase (SDP). The cover a central 4x4 sq deg region cluster. use SPIRE PACS photometry to produce 100, 160, 250, 350 500 micron luminosity functions (LFs) for optically bright galaxies that are selected at detected in all bands. compare these LFs with those previously derived using IRAS, BLAST Herschel-ATLAS data. do not have large numbers faint or examples very luminous seen...
A candidate diffuse stellar substructure was previously reported in the halo of nearby dwarf starburst galaxy NGC 4449 by Karachentsev et al. We map and analyze this feature using a unique combination deep integrated-light images from Black Bird 0.5-meter telescope, high-resolution wide-field 8-meter Subaru which resolve nebulosity into stream red giant branch stars, confirm its physical association with 4449. The properties imply massive spheroidal progenitor, after complete disruption will...
Using new far-infrared imaging from the Herschel Space Observatory with ancillary data ultraviolet to submillimeter wavelengths, we estimate total emission dust and stars of 62 nearby galaxies in KINGFISH survey a way that is as empirical model-independent possible. We collect exploit these order measure spectral energy distributions (SEDs) precisely how much stellar radiation intercepted re-radiated by dust, this quantity varies galaxy properties. By including SPIRE data, are more sensitive...
We present the stellar kinematic maps of a large sample galaxies from integral-field spectroscopic survey CALIFA. The comprises 300 displaying wide range morphologies across Hubble sequence, ellipticals to late-type spirals. This dataset allows us homogeneously extract kinematics up several effective radii. In this paper, we describe level completeness subset with respect full CALIFA sample, as well virtues and limitations extraction compared other well-known surveys. addition, provide...
While studies of gas-phase metallicity gradients in disc galaxies are common, very little has been done towards the acquisition stellar abundance same regions. We present here a comparative study and age distributions sample 62 nearly face-on, spiral with without bars, using data from CALIFA survey. measure slopes their relation other properties galaxies. find that mean shallow negative. Furthermore, when normalized to effective radius disc, slope population does not correlate mass or...
We present dynamical and structural scaling relations of quiescent galaxies at z=2, including the mass-size relation first constraints on fundamental plane (FP). The backbone analysis is a new, very deep VLT/X-shooter spectrum massive, compact, galaxy z=2.0389. detect continuum between 3700-22000A several strong absorption features (Balmer series, Ca H+K, G-band), from which we derive stellar velocity dispersion 318 +/- 53 km/s. perform detailed modeling emission line indices simultaneous...
The Herschel Reference Survey (HRS) is a guaranteed time key project aimed at studying the physical properties of interstellar medium in galaxies nearby universe. This volume limited, K-band selected sample composed spanning whole range morphological types (from ellipticals to late-type spirals) and environments field centre Virgo Cluster). We present flux density measurements 323 HRS three bands Spectral Photometric Imaging Receiver (SPIRE), 250, 350 500 microns. Aperture photometry...
ABSTRACT The “main sequence of galaxies”—defined in terms the total star formation rate ψ versus stellar mass M * —is a well-studied tight relation that has been observed at several wavelengths and different redshifts. All earlier studies have derived this from integrated properties galaxies. We recover same an analysis spatially resolved properties, with integral field spectroscopic (IFS) observations 306 galaxies CALIFA survey. consider SFR surface density units log( ⊙ yr −1 Kpc −2 )...
We present an updated version of the mass–metallicity (MZ) relation using integral field spectroscopy data obtained from 734 galaxies observed by CALIFA survey. These unparalleled spatially resolved spectroscopic allow us to determine metallicity at same physical scale (Re) for different calibrators. obtain MZ relations with similar shapes all calibrators, once scalefactors among them are taken into account. do not find any significant secondary either star formation rate (SFR) or specific...