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Extragalactic Background Light, MACHOs, and the Cosmic Stellar Baryon Budget
Piero Madau, Francesco Haardt, Lucia Pozzetti
The optical/far-IR extragalactic background light (EBL) from both resolved and unresolved extragalactic sources is an indicator of the total luminosity of cosmic structures, as the…
The Optical Extragalactic Background Light from Resolved Galaxies
Lucia Pozzetti, Piero Madau
We discuss the ultraviolet to near-IR galaxy counts from the deepest imaging surveys, including the northern and southern Hubble Deep Fields. The logarithmic slope of the galaxy nu…
Extremely red galaxies: age and dust degeneracy solved ?
L. Pozzetti, F. Mannucci
The extremely red galaxies (ERGs) are defined in terms of their very red optical-to-near IR colours (as R-K>5 or I-K>4). Originally this selection was aimed at selecting old (> 1 G…
The density of extremely red objects around high-z radio-loud AGN
A. Cimatti, D. Villani, L. Pozzetti +1
We present the results of a K-band imaging survey of 40 arcmin^{2} in fields around 14 radio-loud AGN (6 radio galaxies and 8 quasars) with z>1.5. The survey, 80% complete to K<19.…
Gravitational Lensing Effects on High Redshift Type II Supernova Studies with NGST
Simone Marri, Andrea Ferrara, Lucia Pozzetti
We derive the expected Type II SN differential number counts, N(m), and Hubble diagram for SCDM and LCDM cosmological models, taking into account the effects of gravitational lensi…