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- Istituto Nazionale di Fisica Nucleare, Sezione di MilanoIT369 papers
- Brera Astronomical ObservatoryIT367 papers
- National Institute for AstrophysicsIT354 papers
- University of Milano-BicoccaIT255 papers
- University of MilanIT233 papers
- Centre National de la Recherche ScientifiqueFR220 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaIT216 papers
- University of PaduaIT178 papers
- Osservatorio Astronomico di PadovaIT153 papers
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- Astronomical Observatory of RomeIT117 papers
4 papers · 2 filters
What is the redshift of the gamma- ray BL Lac source S4 0954+65?
M. Landoni, R. Falomo, A. Treves +2
High signal-to-noise ratio spectroscopic observations of the BL Lac object S4 0954+65 at the alleged redshift z = 0.367 are presented. This source was detected at gamma frequencies…
Cosmic Reionization after Planck: Could Quasars Do It All?
Piero Madau, Francesco Haardt
We assess a model of late cosmic reionization in which the ionizing background radiation arises entirely from high redshift quasars and other active galactic nuclei (AGNs). The low…
High redshift AGNs and HI reionisation: limits from the unresolved X-ray background
Francesco Haardt, Ruben Salvaterra
The rapidly declining population of bright quasars at z~3 appears to make an increasingly small contribution to the ionising background at the HI Lyman limit. It is then generally…
Group-galaxy correlations in redshift space as a probe of the growth of structure
Faizan G. Mohammad, Sylvain de la Torre, Davide Bianchi +2
We investigate the use of the cross-correlation between galaxies and galaxy groups to measure redshift-space distortions (RSD) and thus probe the growth rate of cosmological struct…