395 citations · 1.4k across the 20 of their papers we have counts for
20 papers
The Hot and Energetic Universe: Astrophysics of feedback in local AGN
M. Cappi, C. Done, E. Behar +30
Understanding the astrophysics of feedback in active galactic nuclei (AGN) is key to understanding the growth and co-evolution of supermassive black holes and galaxies. AGN-driven…
The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
Kirpal Nandra, Didier Barret, Xavier Barcons +237
This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of tw…
The XMM Deep survey in the CDFS V. Iron K lines from active galactic nuclei in the distant Universe
S. Falocco, F. J. Carrera, A. Corral +11
X-ray spectroscopy of active galactic nuclei (AGN) offers the opportunity to directly probe the inner regions of the accretion disk. We present the results of our analysis of avera…
The XMM deep survey in the CDFS IV. Candidate Compton-thick AGN
I. Georgantopoulos, A. Comastri, C. Vignali +15
The Chandra Deep Field is the region of the sky with the highest concentration of X-ray data available: 4Ms of Chandra and 3Ms of XMM data, allowing excellent quality spectra to be…
Mosaiced wide-field VLBI observations of the Lockman Hole/XMM
Enno Middelberg, Adam Deller, Ray Norris +6
Active Galactic Nuclei (AGN) play a decisive role in galaxy evolution, particularly so when operating in a radiatively inefficient mode, where they launch powerful jets that reshap…
GOODS-Herschel: radio-excess signature of hidden AGN activity in distant star-forming galaxies
A. Del Moro, D. M. Alexander, J. R. Mullaney +23
We present here a new spectral energy distribution (SED) fitting approach that we adopt to select radio-excess sources amongst distant star-forming galaxies in the GOODS-Herschel (…
No clear submillimetre signature of suppressed star formation amongst X-ray luminous AGNs
C. M. Harrison, D. M. Alexander, J. R. Mullaney +18
Many theoretical models require powerful active galactic nuclei (AGNs) to suppress star formation in distant galaxies and reproduce the observed properties of today's massive galax…
The nature of the unresolved extragalactic soft CXB
N. Cappelluti, P. Ranalli, M. Roncarelli +11
In this paper we investigate the power spectrum of the unresolved 0.5-2 keV CXB with deep Chandra 4 Ms observations in the CDFS. We measured a signal which, on scales >30", is sign…
Photometry and Photometric Redshift catalogs for the Lockman Hole Deep Field
S. Fotopoulou, M. Salvato, G. Hasinger +8
We present broad band photometry and photometric redshifts for 187611 sources located in ~0.5deg^2 in the Lockman Hole area. The catalog includes 389 X-ray detected sources identif…
On the Lx-L6micron ratio as a diagnostic for Compton-thick AGN
I. Georgantopoulos, E. Rovilos, A. Akylas +6
As the mid-IR luminosity represents a good isotropic proxy of the AGN power, a low X-ray to mid-IR luminosity ratio is often claimed to be a reliable indicator for selecting Compto…
X-ray observations of highly obscured 9.7 micron sources: an efficient method for selecting Compton-thick AGN ?
I. Georgantopoulos, K. M. Dasyra, E. Rovilos +8
Spitzer/IRS has revealed many sources with very deep Si features at 9.7micron (tau>1). We set out to investigate whether a strong Si absorption feature is a good indicator for the…
Optical and infrared properties of active galactic nuclei in the Lockman Hole
E. Rovilos, S. Fotopoulou, M. Salvato +4
We present the observed-frame optical, near- and mid-infrared properties of X-ray selected AGN in the Lockman Hole. Using a likelihood ratio method on optical, near-infrared or mid…
X-ray observations of sub-mm LABOCA galaxies in the eCDFS
I. Georgantopoulos, E. Rovilos, A. Comastri
We explore the X-ray properties of the 126 sub-mm galaxies (SMGs) of the LABOCA survey in the CDFS and the eCDFS regions. SMGs are believed to experience massive episodes of star-f…
A pan-chromatic view of the galaxy cluster XMMU J1230.3+1339 at z=0.975 - Observing the assembly of a massive system
Rene Fassbender, Hans Böhringer, Joana S. Santos +16
We present a comprehensive galaxy cluster study of XMMU J1230.3+1339 based on a joint analysis of X-ray data, optical imaging and spectroscopy observations, weak lensing results, a…
X-ray selected Infrared Excess AGN in the Chandra Deep Fields: a moderate fraction of Compton-thick sources
I. Georgantopoulos, E. Rovilos, E. M. Xilouris +2
We examine the properties of the X-ray detected, Infrared Excess AGN or Dust Obscured Galaxies (DOGs) in the Chandra Deep Fields (CDF). We find 26 X-ray selected sources which obey…
Optically faint X-ray sources in the CDFN: Spitzer constraints
E. Rovilos, I. Georgantopoulos, A. Akylas +1
We investigate the properties of the most optically faint sources in the GOODS-N area (R > 26.5 AB). Such extremely optically faint populations present an uncharted territory despi…
Star formation in AGN hosts in GOODS-N
L. Shao, D. Lutz, R. Nordon +40
Sensitive Herschel far-infrared observations can break degeneracies that were inherent to previous studies of star formation in high-z AGN hosts. Combining PACS 100 and 160um obser…
Normal galaxies in the XMM-Newton fields. X-rays as a star formation indicator
E. Rovilos, I. Georgantopoulos, P. Tzanavaris +4
Context: We use the first XMM serendipitous source catalogue (1XMM) to compile a sample of normal X-ray galaxies Aims: We seek to expand the database of X-ray selected normal galax…
Searching for mid-IR obscured AGN in the CDF-N
I. Georgantopoulos, A. Georgakakis, M. Rowan-Robinson +1
The efficiency of mid-infrared selection methods for finding obscured AGN is investigated using data in the \chandra Deep Field North. It is shown that samples of AGN candidates co…
Radio observations of the CDF-South: a possible link between radio emission and star formation in X-ray selected AGN
E. Rovilos, A. Georgakakis, I. Georgantopoulos +4
We explore the nature of the radio emission of X-ray selected AGN by combining deep radio (1.4GHz; 60micro-Jy) and X-ray data with multiwavelength (optical, mid-infrared) observati…