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10 papers · 1 filter
PRISM (Polarized Radiation Imaging and Spectroscopy Mission): An Extended White Paper
PRISM Collaboration, Philippe André, Carlo Baccigalupi +140
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in May 2013 as a large-class mission for investigating within the framework of the ESA Cosmic Visio…
The Carina Project. VI. The helium burning variable stars
G. Coppola, P. B. Stetson, M. Marconi +14
We present new optical (BVI) time-series data for the evolved variable stars in the Carina dwarf spheroidal galaxy. The quality of the data and the observing strategy allowed us to…
Low Variance at large scales of WMAP 9 year data
A. Gruppuso, P. Natoli, F. Paci +4
We use an optimal estimator to study the variance of the WMAP 9 CMB field at low resolution, in both temperature and polarization. Employing realistic Monte Carlo simulation, we fi…
Planck 2013 results. XXV. Searches for cosmic strings and other topological defects
Planck Collaboration, P. A. R. Ade, N. Aghanim +225
Planck data have been used to provide stringent new constraints on cosmic strings and other defects. We describe forecasts of the CMB power spectrum induced by cosmic strings, calc…
Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts
Planck Collaboration, P. A. R. Ade, N. Aghanim +252
We present constraints on cosmological parameters using number counts as a function of redshift for a sub-sample of 189 galaxy clusters from the Planck SZ (PSZ) catalogue. The PSZ…
A simplified view of blazars: the gamma-ray case
P. Giommi, P. Padovani, G. Polenta
We have recently proposed a new simplified scenario where blazars are classified as flat-spectrum radio quasars (FSRQs) or BL Lacs according to the prescriptions of unified schemes…