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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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101 papers · 2 filters
Dynamical Relaxation and Massive Extrasolar Planets
J. C. B. Papaloizou, Caroline Terquem
Following the suggestion of Black (1997) that some massive extrasolar planets may be associated with the tail of the distribution of stellar companions, we investigate a scenario i…
Tunable-filter imaging of quasar fields at z~1. I. A cluster around MRC B0450-221
Joanne C. Baker, Richard W. Hunstead, Malcolm N. Bremer +3
Using a combination of multicolour broad- and narrow-band imaging techniques and follow-up spectroscopy, we have detected an overdensity of galaxies in the field of quasar MRC B045…
The microwave background temperature at the redshift of 2.33771
R. Srianand, Patrick Petitjean, Cedric Ledoux
The Cosmic Microwave Background radiation is a fundamental prediction of Hot Big Bang cosmology. The temperature of its black-body spectrum has been measured at the present time, $…
ATCA search for 21 cm emission from a candidate damped Ly- absorber at z = 0.101
Nissim Kanekar, Jayaram N Chengalur, Ravi Subrahmanyan +1
We report a deep search for 21 cm emission/absorption from the candidate damped Lyman- system towards PKS 0439-433, using the Australia Telescope Compact Array (A…
Spectroscopy of Ultra Steep Spectrum Radio Sources
Carlos De Breuck, Wil van Breugel, Huub Rottgering +6
We present optical spectroscopy of 62 objects selected from several samples of ultra steep spectrum (USS) radio sources. 46 of these are from our primary catalog, consisting of 669…
Terapixel Surveys for Cosmic Shear
Y. Mellier, L. van Waerbeke, M. Radovich +14
The recent detections of cosmic shear signal announced by several groups have demonstrated the feasibility of this challenging program and convinced astro- nomers of its potential…
Error estimation for the MAP experiment
S. Prunet, R. Teyssier, S. T. Scully +2
We report here the first full sky component separation and CMB power spectrum estimation using a Wiener filtering technique on simulated data from the upcoming MAP experiment, set…
Source-lens clustering effects on the skewness of the lensing convergence
Takashi Hamana, Stephane T. Colombi, Aurelien Thion +3
The correlation between source galaxies and lensing potentials causes a systematic effect on measurements of cosmic shear statistics, known as the source-lens clustering (SLC) effe…
A Cosmological Window on Trans-Planckian Physics
Jerome Martin, Robert H. Brandenberger
In the framework of inflation, scales which nowadays correspond to large scale structures were smaller than the Planck length at the beginning of inflation. Therefore, measurements…
Annihilations from the Galactic Centre
G. Bertone, G. Sigl, J. Silk
A massive black hole is present at the centre of our galaxy and inevitably accretes dark matter particles, creating a region of very high particle density. The annihilation rate is…
Lithium-Beryllium-Boron and Oxygen in the early Galaxy
Elisabeth Vangioni-Flam, Michel Casse
Oxygen is a much better evolutionary index than iron to follow the history of Lithium-Beryllium-Boron (LiBeB) since it is the main producer of these light elements at least in the…
Molecular hydrogen and the nature of damped Lyman-alpha systems
Patrick Petitjean, R. Srianand, Cédric Ledoux
We report results from our mini-survey for molecular hydrogen in eight high redshift damped Lyman-alpha (DLA) systems using the ESO Ultra-violet and Visible Spectrograph on the VLT…
The nature of dwarf nova outbursts
Valentin Buat-Menard, Jean-Marie Hameury, Jean-Pierre Lasota
We show that if the dwarf-nova disc instability model includes the effects of heating by stream impact and tidal torque dissipation in the outer disc, the calculated properties of…
Tree structure of the percolating Universe
Stephane Colombi, Dmitry Pogosyan, Tarun Souradeep
We present a numerical study of topological descriptors of initially Gaussian and scale-free density perturbations evolving via gravitational instability in an expanding universe.…
Cosmic Shear Analysis in 50 Uncorrelated VLT Fields. Implications for Omega_0, sigma_8
R. Maoli, L. Van Waerbeke, Y. Mellier +5
We observed with the camera FORS1 on the VLT (UT1, ANTU) 50 randomly selected fields and analyzed the cosmic shear inside circular apertures with diameter ranging from 0.5 to 5.0 a…
New Results on the Helium Stars in the Galactic Center Using BEAR Spectro-Imagery
T. Paumard, J. P. Maillard, M. Morris +1
Integral field spectroscopy of the central parsec of the Galactic Center was obtained at 2.06 microns using BEAR, an imaging Fourier Transform Spectrometer, at a spectral resolutio…
H-alpha Equivalent Width Variations across the Face of a Microlensed K Giant in the Galactic Bulge
M. Albrow, J. An, J. -P. Beaulieu +14
We present VLT FORS1 spectroscopy that temporally resolves the second caustic crossing of the Bulge K giant source of microlensing event EROS 2000-BLG-5, the first time this has be…
The Angular Power Spectrum of EDSGC Galaxies
Dragan Huterer, Lloyd Knox, Robert C. Nichol
We determine the angular power spectrum, C_l, of the Edinburgh/Durham Southern Galaxy Catalog (EDSGC) and use this statistic to constrain cosmological parameters. Our methods for d…
Mid-infrared imaging and spectroscopy of the enigmatic cocoon stars in the Quintuplet Cluster
A. Moneti, S. Stolovy, J. A. D. L. Blommaert +2
In an attempt to determine the nature of the enigmatic cocoon stars in the Quintuplet Cluster, we have obtained mid-infrared imaging and spectrophotometry of the cluster, using the…
A deep submillimetre survey of the Galactic Centre
D. Pierce-Price, J. S. Richer, J. S. Greaves +13
We present first results from a submillimetre continuum survey of the Galactic Centre `Central Molecular Zone' (CMZ), made with SCUBA on the James Clerk Maxwell Telescope. SCUBA's…
Linear Analysis of the Hall Effect in Protostellar Disks
S. A. Balbus, C. Terquem
The effects of Hall electromotive forces (HEMFs) on the linear stability of protostellar disks are examined. Earlier work on this topic focused on axial field and perturbation wave…
Standard Cosmic Ray Energetics and Light Element Production
Brian D. Fields, Keith A. Olive, Michel Casse +1
The recent observations of Be and B in metal poor stars has led to a reassessment of the origin of the light elements in the early Galaxy. At low it is metallicity ([O/H] < -1.75),…
Lifting cosmic degeneracy within a single quasar survey
Boudewijn F. Roukema, Gary A. Mamon
In the almost Friedmann-Lema^itre model of the Universe, the density parameter, Omega_matter, and the cosmological constant, Omega_Lambda, measure curvature. Several linearly degen…
Cepheid Mass-Luminosity Relations from the Magellanic Clouds
J. P. Beaulieu, J. R. Buchler, Z. Kollath
The OGLE data base is used in conjunction with Kurucz atmosphere models to generate sets of period, effective temperature and luminosity for fundamental and overtone Magellanic Clo…