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Cosmic Radiative Feedback from Reionization
R. Salvaterra, C. Burigana, R. Schneider +3
We explore the effect of cosmic radiative feedback from the sources of reionization on the thermal evolution of the intergalactic medium. We find that different prescriptions for t…
Constraints on the lepton asymmetry and radiation energy density: Implications for PLANCK
Lucia Aurelia Popa, Ana Vasile
By using most of the present CMB and LSS measurements and the BBN constraints on the primordial helium abundance, Y_p, we set bounds on the radiation content of the Universe and ne…
Detectable Signatures of Cosmic Radiative Feedback
R. Schneider, R. Salvaterra, T. Roy Choudhury +3
We use a semi-analytical model to study the impact of reionization, and the associated radiative feedback, on galaxy formation. Two feedback models have been considered: (i) a stan…
History of stellar evolution at high redshifts: Implications for the CMB E-mode polarization
L. A. Popa
The epoch of the end of reionization and the Thomson optical depth to the cosmic microwave background depend on the power spectrum amplitude on small scales and on the ionizing pho…
Radiative effects by high-z UV radiation background: Implications for the future CMB polarization measurements
L. A. Popa, C. Burigana, N. Mandolesi
We investigate the role of the radiative effects for the temporal evolution of the reionization fraction by using cosmological Smooth Particle Hydrodynamics (SPH) simulations. We f…
Cosmological reionization after WMAP: perspectives from PLANCK and future CMB missions
C. Burigana, L. A. Popa, F. Finelli +3
The WMAP first year detection of a high redshift reionization through its imprints on CMB anisotropy T and TE mode angular power spectra calls for a better comprehension of the uni…
The Planck Low Frequency Instrument
N. Mandolesi, C. Burigana, R. C. Butler +14
Planck is the third generation of mm-wave instruments designed for space observations of the cosmic microwave background (CMB) anisotropies within the new Cosmic Vision 2020 ESA Sc…
Signature of HDM clustering at Planck angular scales
L. A. Popa, C. Burigana, N. Mandolesi
We present the CMB anisotropy induced by the non-linear perturbations in the massive neutrino density associated to the non-linear gravitational clustering. We show that the non-li…
Non-linear evolution of the cosmological background density field as diagnostic of the cosmological reionization
L. A. Popa, C. Burigana, N. Mandolesi
We present constraints on the cosmological and reionization parameters based on the cumulative mass function of the Ly-alpha systems. We find that the analysis of the cumulative ma…
Testing the principle of equivalence with Planck surveyor
L. A. Popa, C. Burigana, N. Mandolesi
We consider the effect of the violation of the equivalence principle (VEP) by the massive neutrino component on the Cosmic Microwave Background angular power specrum. We show that…
Dynamical effects of the neutrino gravitational clustering at Planck angular scales
L. A. Popa, C. Burigana, N. Mandolesi
We study the CMB anisotropy induced by the non-linear perturbations in the massive neutrino density associated to the non-linear gravitational clustering proceses. Our results show…
The Planck Low Frequency Instrument
N. Mandolesi, M. Bersanelli, C. Burigana +1
The Low Frequency Instrument (LFI) of the "Planck Surveyor" ESA mission will perform high-resolution imaging of the Cosmic Microwave Background anisotropies at four frequencies in…
The SPOrt Project: Cosmological and Astrophysical Goals
R. Fabbri, S. Cortiglioni, S. Cecchini +13
We present the cosmological and astrophysical objectives of the SPOrt mission, which is scheduled for flying on the International Space Station (ISS) in the year 2002 with the purp…
The SPOrt Project: an Experimental Overview
S. Cortiglioni, S. Cecchini, E. Carretti +13
The Sky Polarization Observatory (SPOrt) is presented as a project aimed to measure the diffuse sky polarized emission, from the International Space Station, in the frequency range…
Power Fluctuations in the Wavelet Space: Large-Scale CMB Non-Gaussian Statistics
Lucia Popa
We analyse the large-scale coherence of the CMB anisotropy field with non-gaussian initial conditions usind 2-point function of the power fluctuations in the wavelet space. Employi…