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313 papers · 1 filter
An expansion estimate for dispersing planar billiards with corner points
Jacopo De Simoi, Imre Péter Tóth
It is known that the dynamics of planar billiards satisfies strong mixing properties (e.g. exponential decay of correlations) provided that some expansion condition on unstable cur…
On the Stochastic Limit of Quantum Field Theory
L. Accardi, J. Gough, Y. G. Lu
The weak coupling limit for a quantum system, with discrete energy spectrum, coupled to a Bose reservoir with the most general linear interaction is considered: under this limit we…
Acceleration with Self-Injection for an All-Optical Radiation Source at LNF
L. A. Gizzi, M. P. Anania, G. Gatti +8
We discuss a new compact gamma-ray source aiming at high spectral density, up to two orders of magnitude higher than currently available bremsstrahlung sources, and conceptually si…
Planck Intermediate Results. XI: The gas content of dark matter halos: the Sunyaev-Zeldovich-stellar mass relation for locally brightest galaxies
Planck Collaboration, P. A. R. Ade, N. Aghanim +194
We present the scaling relation between Sunyaev-Zeldovich (SZ) signal and stellar mass for almost 260,000 locally brightest galaxies (LBGs) selected from the Sloan Digital Sky Surv…
Variability and the X-ray/UV ratio of active galactic nuclei. II. Analysis of a low-redshift Swift sample
F. Vagnetti, M. Antonucci, D. Trevese
Variability, both in X-ray and optical/UV, affects the well-known anti-correlation between the spectral index and the UV luminosity of active galactic nuclei, contributing…
The Planck Sunyaev-Zel'dovich vs. the X-ray View of the Coma Cluster
R. Fusco-Femiano, A. Lapi, A. Cavaliere
The Planck collaboration has recently published precise and resolved measurements of the Sunyaev-Zel'dovich effect in Abell 1656 (the Coma cluster of galaxies), so directly gauging…