A5056483406- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Astronomical Observations and Instrumentation
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Scientific Research and Discoveries
- History and Developments in Astronomy
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Pulsars and Gravitational Waves Research
- SAS software applications and methods
- CCD and CMOS Imaging Sensors
- Photocathodes and Microchannel Plates
- Advanced Fiber Laser Technologies
- Orbital Angular Momentum in Optics
- Spectroscopy and Laser Applications
- Medical Imaging Techniques and Applications
- Historical Astronomy and Related Studies
Arcetri Astrophysical Observatory
2012-2021
National Institute for Astrophysics
2006-2017
Space Telescope European Coordinating Facility
1986-2008
Telescopio Nazionale Galileo
1999
University of Florence
1996
European Southern Observatory
1989-1991
International Space Station
1990
Osservatorio Astronomico di Padova
1980-1986
European Space Research and Technology Centre
1982-1983
Chilton Medical Center
1982
We report on a complete sample of seven luminous early-type galaxies in the Hubble Ultra Deep Field (UDF) with spectroscopic redshifts between 1.39 and 2.47, to KAB < 23. Using BzK selection criterion, we have preselected set objects over UDF, which fulfill photometric conditions for being passively evolving at z > 1.4. Low-resolution spectra these been extracted from Space Telescope (HST) ACS grism data taken UDF by Grism Program Extragalactic Science (GRAPES) project. Redshifts identified...
This book lays out the scientific goals to be addressed by next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned consist of dedicated telescopes at South Pole, high Chilean Atacama plateau and possibly a northern hemisphere site, all equipped with new superconducting cameras. CMB-S4 will dramatically advance cosmological studies crossing critical thresholds in search for B-mode polarization signature primordial gravitational waves, determination number...
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 present optical spectra for a complete sample of radio galaxies and quasars comprising all sources from the Wall & Peacock 2.7-GHz with redshifts z < 0.7 declinations δ + 10°; this is down to flux density 2 Jy. Although not 2-Jy have spectroscopic redshifts, we argue that most unidentified objects are at high our largely complete. The data will be analysed in future paper.
We present Herschel observations of 62 early-type galaxies (ETGs), including 39 morphologically classified as S0+S0a and 23 ellipticals using SPIRE at 250, 350, 500 μm part the volume-limited Reference Survey (HRS). detect dust emission in 24% 62% S0s. The mean temperature is 〈Td〉 = 23.9 ± 0.8 K, warmer than that found for late-type Virgo Cluster. mass entire detected sample logMd 6.1 0.1 M☉ with a dust-to-stellar-mass ratio log(Md/M*) −4.3 0.1. Including non-detections, these parameters are...
We gather infrared (IR) photometric data from 8 to 500 microns (Spitzer, WISE, IRAS and Herschel) for all of the HRS galaxies. Draine & Li (2007) models are fit which stellar contribution has been carefully removed. find that our coverage is sufficient constrain parameters a strong constraint on 20-60 range mandatory estimate relative photo-dissociation regions IR SED. The SED tend systematically under-estimate observed flux densities, especially low mass systems. provide output galaxies:...
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...
We measured stellar velocity dispersions σ and derived dynamical masses of nine massive (M ≈ 1011 M☉) early-type galaxies (ETGs) from the Galaxy Mass Assembly ultra-deep Spectroscopic Survey (GMASS) sample at redshift 1.4 ≲ z 2.0. The are based on individual spectra for two a stacked spectrum seven with 1.6 < 2.0, 202 hr exposure ESO Very Large Telescope. constructed detailed axisymmetric models objects, Jeans equations, taking observed surface brightness (from deep HST/ACS observations),...
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...
The GALEX Ultraviolet Virgo Cluster Survey (GUViCS) is a complete blind survey of the cluster covering about 40 sq. deg. in far UV (FUV, lambda_eff=1539A, Delta-lambda=442A) and 120 near (NUV, lambda_eff=2316A, Delta-lambda=1060A). goal to study ultraviolet (UV) properties galaxies rich environment, spanning wide luminosity range from giants dwarfs, regardless prior knowledge their star formation activity. data will be combined with those other bands (optical: NGVS; far-infrared - submm:...
We present Herschel/PACS 100 and 160 µm integrated photometry for the 323 galaxies in Herschel Reference Survey (HRS), a K-band, volume-limited sample of local Universe.Once combined with Herschel/SPIRE observations already available, these data make HRS largest representative nearby homogeneous coverage across 100-500 wavelength range.In this paper, we take advantage unique set to investigate properties shape far-infrared/submillimetre spectral energy distribution galaxies.We show that,...
Spectroscopic redshifts have been measured for nine K-band luminous galaxies at 1.7 < z 2.3, selected with Ks 20 in the K20 survey region of Great Observatories Origins Deep Survey (GOODS) area. Star formation rates (SFRs) ~100-500 M☉ yr-1 are derived when dust extinction is taken into account. The fitting their multicolor spectral energy distributions indicates stellar masses M ≳ 1011 most galaxies. Their rest-frame UV morphology highly irregular, suggesting that merging-driven starbursts...
In classifying the ensemble of powerful extragalactic radio sources, considerable evidence has accumulated that galaxies and quasars are orientation-dependent manifestations same parent population: massive spheroidal containing correspondingly black holes.One key factors in establishing this unification been signature a hidden quasar detected some polarized light.The obscuration our direct view active nucleus usually, but not necessarily exclusively, by thick nuclear disk or torus can act...
Using the multi-integral field spectrograph GIRAFFE at VLT, we have derived K-band Tully-Fisher relation (TFR) for a representative sample of 65 galaxies with emission lines ( Å). We confirm that scatter in TFR is caused by anomalous kinematics, and find positive strong correlation between complexity kinematics they contribute to TFR. Considering only relaxed-rotating disks, scatter, possibly also slope, TFR, do not appear evolve redshift. detect an evolution zero point , which, if...
We present grism spectra taken with the Advanced Camera for Surveys to identify 29 red sources (i'-z') > 0.9 in Hubble Ultra Deep Field (HUDF). Of these 23 are found be galaxies at redshifts between z=5.4 and 6.7, identified by break 1216 angstrom due IGM absorption; two late type dwarf stars colors; four colors spectral shape similar dust reddened or old z~1-2. This constitutes largest uniform, flux-limited sample of spectroscopically confirmed such faint fluxes z'<27.5. Many also...
Context.This paper prepares a series of papers analysing the Intermediate MAss Galaxy Evolution Sequence (IMAGES) up to redshift one. mass galaxies () are selected from Chandra Deep Field South (CDFS) for which we identify serious lack spectroscopically determined redshifts.
By combining <i>Herschel<i/>-SPIRE observations obtained as part of the <i>Herschel<i/> Virgo Cluster Survey with 21 cm Hi data from literature, we investigate role cluster environment on dust content spiral galaxies. We show for first time that extent disk is significantly reduced in Hi-deficient galaxies, following remarkably well observed "truncation" disk. The ratio submillimetre-to-optical diameter correlates Hi-deficiency, suggesting able to strip gas. These results provide important...
We present the results of observations taken with X-shooter spectrograph devoted to study quasars at z ~ 6. This paper focuses on properties metals high redshift traced, in particular, by C IV doublet absorption systems. Six objects were observed resolutions ~27 and 34 km/s visual, 37.5 53.5 near infrared. detected 102 lines range: 4.35 < 6.2 which 27 are above 5. Thanks characteristics resolution spectral coverage X-shooter, we could also detect 25 Si doublets associated z>5. The column...
We examined variations in the 160/250 and 250/350 μm surface brightness ratios within 24 nearby (<30 Mpc) face-on spiral galaxies observed with Herschel Space Observatory to identify heating mechanisms for dust emitting at these wavelengths. The analysis consisted of both qualitative quantitative comparisons Hα emission, which trace light from star-forming regions, 3.6 traces older stellar populations galaxies. find broad dust. In one subset galaxies, we found evidence that emission ≤160...
We present the results of kinematic study extended gas in a sample 10 high redshift radio galaxies (z~2.5) based on signal to noise Keck II and VLT long slit spectroscopy. In addition typical surface brightness kinematically perturbed regions (FWHM velocity shifts >1000 km/s), we find all objects giant low halos which show quieter kinematics with emission line FWHM several hundred km/s. The often extend for more than 100 kpc sometimes beyond structures. Their specta are active galaxies....