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Research Interests: Physics, Star Formation, Galaxy Formation and Evolution, Near Infrared, Galaxy evolution, and 12 moreData Reduction, Selection Criteria, Mid-Infrared, Infrared Space Observatory, Comparative method, Infrared, Seyfert galaxies, De Sitter, Starburst Galaxies, Astronomy and Astrophysics, Spectral Energy Distribution, and Model fitting
Research Interests:
Research Interests:
Research Interests: Physics, Star Formation, Galaxy Formation and Evolution, Chemical Evolution, Astrophysics, and 13 moreHigh Redshift Universe, Galactic halo, Quasar, Time Delay, Evolutionary History, High redshift galaxies and quasars, Nuclear Reactions, Luminosity function, Chemical Properties, Elliptical galaxies, Astronomy and Astrophysics, Angular Momentum, and Spheroid
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We have shown with Cycle 1 observations that Spitzer has the capability of disentangling age and metallicity in old stellar populations. By looking to the broad emission feature left by dust enshrouded asymptotic giant branch stars above... more
We have shown with Cycle 1 observations that Spitzer has the capability of disentangling age and metallicity in old stellar populations. By looking to the broad emission feature left by dust enshrouded asymptotic giant branch stars above 9.7 microns, Spitzer IRS can provide direct evidence that the colour-magnitude relation of Virgo ellipticals is mainly driven by metallicity. However, with the IRS spectrograph we can only probe the bright tail of the colour-magnitude relation, and only in the nearest cluster. We propose to use IRS Blue ...
GRASIL (which stands for GRAphite and SILicate) computes the spectral evolution of stellar systems taking into account the effects of dust, which absorbs and scatters optical and UV photons and emits in the IR-submm region. It may be used... more
GRASIL (which stands for GRAphite and SILicate) computes the spectral evolution of stellar systems taking into account the effects of dust, which absorbs and scatters optical and UV photons and emits in the IR-submm region. It may be used as well to do" standard" no-dust stellar spectral synthesis. The code is very well calibrated and applied to interpret galaxies at different redshifts. GRASIL can be downloaded or run online using the GALSYNTH WEB interface.
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Abstract: We have investigated the properties of a bright K-band selected sample of early-type galaxies in the Hubble Deep Field, as representative of the field galaxy population. This dataset is unique as for the morphological... more
Abstract: We have investigated the properties of a bright K-band selected sample of early-type galaxies in the Hubble Deep Field, as representative of the field galaxy population. This dataset is unique as for the morphological information on faint high-z sources, and for complete photometric and spectroscopic coverage. The majority of bright early-type galaxies in this field are found at redshifts $ z\ leq 1.3$ to share common properties with those of high-z cluster samples, as for the age and mass of the dominant stellar population--which are ...
Abstract: We present a hierarchical galaxy formation model which can account for the number counts of sources detected through their emission at sub-millimetre wavelengths. The first stage in our approach is an ab initio calculation of... more
Abstract: We present a hierarchical galaxy formation model which can account for the number counts of sources detected through their emission at sub-millimetre wavelengths. The first stage in our approach is an ab initio calculation of the star formation histories for a representative sample of galaxies, which is carried out using the semi-analytical galaxy formation model GALFORM. These star formation histories are then input into the spectro-photometric code GRASIL, to produce a spectral energy distribution for each galaxy. Dust ...