162 citations · 1.3k across the 58 of their papers we have counts for
6 papers · 1 filter
The Red Sequence of High-Redshift Clusters: a Comparison with Cosmological Galaxy Formation Models
N. Menci, P. Rosati, R. Gobat +4
We compare the results from a semi-analytic model of galaxy formation with spectro-photometric observations of distant galaxy clusters observed in the range 0.8< z< 1.3. We investi…
Gravitational lensing by cosmic strings: what we learn from the CSL-1 case
M. V. Sazhin, O. S. Khovanskaya, M. Capaccioli +5
Cosmic strings were postulated by Kibble in 1976 and, from a theoretical point of view, their existence finds support in modern superstring theories, both in compactification model…
"PAH" emission bands in selected planetary nebulae: a study of the behaviour with gas phase C/O ratio
Martin Cohen, Michael J. Barlow
Airborne and space-based low-resolution spectroscopy in the 1980s discovered tantalizing quantitative relationships between the gas phase C/O abundance ratio in planetary nebulae (…
Simulating Chandra observations of galaxy clusters
A. Gardini, E. Rasia, P. Mazzotta +3
Numerical hydro-N-body simulations are very important tools for making theoretical predictions for the formation of galaxy clusters. They show that the atmospheres of clusters of g…
Chandra and XMM-Newton observations of the first quasars: X-rays from the age of cosmic enlightenment
C. Vignali, W. N. Brandt, D. P. Schneider +6
We report on Chandra and XMM-Newton observations of a sample of 13 quasars at z~4.7-5.4 mostly taken from the Sloan Digital Sky Survey (SDSS). The present sample complements previo…
X-ray lighthouses of the high-redshift Universe. Probing the most luminous z>4 Palomar Digital Sky Survey Quasars with Chandra
C. Vignali, W. N. Brandt, D. P. Schneider +2
We present the results from exploratory Chandra observations of nine high-z (z=4.1-4.5) optically selected quasars. These quasars, taken from the DPOSS, are among the optically mos…