The X-ray to optical-UV luminosity ratio of X-ray selected type 1 AGN in XMM-COSMOS
- E. Lusso, A. Comastri, D. Vergani
- Physics
- 21 December 2009
We present a study of the X-ray to optical properties of a sample of 545 X-ray selected type 1 AGN, from the XMM-COSMOS survey, over a wide range of redshifts (0.04 \textless z \textless 4.25) and…
Star formation and mass assembly in high-redshift galaxies
- P. Santini, A. Fontana, I. Vergata
- Physics
- 5 May 2009
Aims. The goal of this work is to infer the star formation properties and the mass assembly process of high redshift (0.3 ≤ z 0.3, the star formation rate is correlated well with stellar mass, and…
Massive molecular outflows and evidence for AGN feedback from CO observations
- C. Cicone, R. Maiolino, S. Veilleux
- Physics
- 11 November 2013
We study the properties of massive, galactic-scale outflows of molecular gas and investigate their impact on galaxy evolution. We present new IRAMPdBI CO(1-0) observations of local ultra-luminous…
THE CHANDRA COSMOS SURVEY. I. OVERVIEW AND POINT SOURCE CATALOG
- M. Elvis, F. Civano, M. Volonteri
- Physics
- 11 March 2009
The Chandra COSMOS Survey (C-COSMOS) is a large, 1.8 Ms, Chandra program that has imaged the central 0.5 deg2 of the COSMOS field (centered at 10h, +02o) with an effective exposure of ∼160 ks, and an…
Discovery of an X-ray afterglow associated with the γ-ray burst of 28 February 1997
- E. Costa, F. Frontera, R. C. Butler
- PhysicsNature
- 19 June 1997
Establishing the nature of γ-ray bursts is one of the greatest challenges in high-energy astrophysics. The distribution of these bursts is isotropic across the sky, but inhomogeneous in space, with a…
Faint AGNs at z > 4 in the CANDELS GOODS-S field: looking for contributors to the reionization of the Universe
- E. Giallongo, A. Grazian, M. Salvato
- Physics
- 9 February 2015
Context. Establishing the number of faint active galactic nuclei (AGNs) at z = 4-6 is crucial to understanding their cosmological importance as main contributors to the reionization of the Universe.…
The HELLAS2XMM Survey. VII. The Hard X-Ray Luminosity Function of AGNs up to z = 4: More Absorbed AGNs at Low Luminosities and High Redshifts
- F. La Franca, F. Fiore, S. Puccetti
- Physics
- 5 September 2005
We have determined the cosmological evolution of the density of active galactic nuclei (AGNs) and of their NH distribution as a function of the unabsorbed 2-10 keV luminosity up to redshift 4. We…
AGN wind scaling relations and the co-evolution of black holes and galaxies
- F. Fiore, C. Feruglio, L. Zappacosta
- Environmental Science
- 15 February 2017
This work was supported by ASI/INAF contract I/009/10/0 and INAF PRIN 2011, 2012 and 2014. MB acknowledges support from the FP7 Career Integration Grant “eEASy” (CIG 321913). LZ acknowledges support…
Compton reflection and iron fluorescence in BeppoSAX observations of Seyfert type 1 galaxies
A sample of nine bright Seyfert 1 and NELG type galaxies, observed with BeppoSAX, is analyzed to assess on a truly broad band basis (0.1{200 keV) the issue of the spectral contributions of Compton…
Quasar feedback revealed by giant molecular outflows
- C. Feruglio, R. Maiolino, F. Fiore
- Physics
- 8 June 2010
In the standard scenario for galaxy evolution young star-forming galaxies transform into red bulge-dominated spheroids, where star formation has been quenched. To explain this transformation, a…
...
...