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Euclidean Quantum Field Theory on Commutative and Noncommutative Spaces
I give an introduction to Euclidean quantum field theory from the point of view of statistical physics, with emphasis both on Feynman graphs and on... -
Index Theorems and Noncommutative Topology
These lecture notes are mainly devoted to a K-theory proof of the Atiyah-Singer index theorem. Some applications of the K-theory to noncommutative... -
Astrophysical Bounds on Planck Suppressed Lorentz Violation
This article reviews many of the observational constraints on Lorentz symmetry violation (LV). We first describe the GZK cuto. and other phenomena... -
Inflationary Cosmological Perturbations of Quantum-Mechanical Origin
This review article aims at presenting the theory of inflation. We first describe the background spacetime behavior during the slow-roll phase and... -
Quantum Gravity
It is not clear at all what is the problem in quantum gravity (cf. [3] or [8] for general reviews, written in the same spirit as the present one).... -
Simulations of Solar AO Systems
In this paper, first we compare the two kinds of algorithms that are being used in solar AO systems to sense a distorted wave-front through... -
Search for Sub-Stellar Companions Using AO – First Results Obtained with NAOS-CONICA
We present first results of our NAOS-CONICA search for close substellar companions around young nearby stars. This program was started only a few... -
Near-Infrared AO Spectroscopy of Edge-On Protoplanetary Disks with Subaru IRCS
We carried out near infrared (1.4–4.2 μm) AO imaging and spectroscopy of two edge-on protoplanetary disks; HK TauB and HV TauC located in Taurus... -
A Search for Close Companions in Sco OB2
Using adaptive optics we study the binary population in the nearby OB association Scorpius OB2. We present the first results of our near-infrared... -
Adaptive Optics Observations of Stars in Globular Clusters and Nearby Galaxies
Observations of nearby stellar systems with the Canada-France-Hawaii Telescope PUEO Adaptive Optics system, the University of Hawaii HOKUPA’A system... -
NACO Observations of NGC 1068
We present various recent results obtained with adaptive optics systems on the very central region of NGC 1068: Grif long-slit spectroscopy in K band... -
A Near-Infrared Adaptive Optics Imaging Survey of Nearby QSOs
We present the results of a near-IR Adaptive Optics imaging survey of 32 nearby (z<0.325) QSOs with curvature AO systems on the Gemini North and... -
Subaru Deep Field with Adaptive Optics
A deep K′-band (2.12μ m) image of 1′ × 1′ blank sky field (Subaru Deep Field; SDF) taken with Subaru Adaptive Optics System (AO) is presented. The... -
Adaptive Optics Science with the MMT Adaptive Secondary: Mid-IR AO Imaging of the Post-AGB Star AC Her
The world’s first adaptive secondary has been commissioned at the 6.5m MMT. Early science results suggests that it is unique and highly productive.... -
One Year of NACO Operations
The first ESO adaptive optics system instrument, NACO, installed at the VLT has been offered to the astronomical community and used on a regular... -
The Construction of X-ray Cluster Surveys and Their Spatial Analysis
The construction of X-ray cluster surveys is described. As an example the selection processes applied to the REFLEX survey and first results of an... -
The 2dF QSO Redshift Survey - 10K@2K!
With $\approx$ 10000 QSO redshifts, the 2dF QSO Redshift Survey... -
Clustering of X-Ray Selected AGN
The analysis of the spatial clustering of the brightest X-ray selected AGN from the ROSAT All Sky Survey is presented. A weak correlation signal at a... -
Strong Constraints on Cosmology from Galaxy Clusters
In this work we show how galaxy clusters can be used to discriminate among different cosmological models. We have used available X-ray & optical... -
Large-Scale Distribution and Spectral Properties of Galaxies in the Shapley Concentration
We present the results of a redshift survey of both cluster and intercluster galaxies in the central part of the Shapley Concentration, the richest...