440 citations · 5k across the 112 of their papers we have counts for
7 papers · 2 filters
First stars VII. Lithium in extremely metal poor dwarfs
P. Bonifacio, P. Molaro, T. Sivarani +12
Aims. This study aims to determine the level and constancy of the Spite plateau as definitively as possible from homogeneous high-quality VLT-UVES spectra of 19 of the most metal-p…
Magnetic flares in Active Galactic Nuclei: Modeling the iron Kalpha-line
R. W. Goosmann, B. Czerny, M. Mouchet +5
The X-ray spectra of Active Galactic Nuclei (AGN) are complex and vary rapidly in time as seen in recent observations. Magnetic flares above the accretion disk can account for the…
Radio and optical realizations of celestial reference frames
S. B. Lambert, S. Bouquillon, C. Le Poncin-Lafitte +2
The International Celestial Reference Frame (ICRF, Ma et al. 1998) is currently the best realization of a quasi-inertial reference system. It is based on more than 10 years of cumu…
Searching for the first galaxies through gravitational lenses
D. Schaerer, R. Pello, J. Richard +7
Observing the first galaxies formed during the reionisation epoch, i.e. approximately within the first billion years after the Big Bang, remains one of the challenges of contempora…
Collisional dust avalanches in debris discs
Anna Grigorieva, Pawel Artymowicz, Philippe Thébault
We quantitatively investigate how collisional avalanches may developin debris discs as the result of the initial break-up of a planetesimal or comet-like object, triggering a colli…
Asteroids as radial velocity and resolving power standards for medium and high resolution spectroscopy
Tomaz Zwitter, Francois Mignard, Francoise Crifo
Echelle spectra of 10 bright asteroids are presented and compared against an observed twilight spectrum and a computed Solar spectrum. Spectra covering a 2130 A spectral range cent…
The structure and X-ray radiation spectra of illuminated accretion disks in AGN. III. Modeling fractional variability
R. W. Goosmann, B. Czerny, M. Mouchet +5
[abridged] Extending the work of Czerny et al. (2004), we model the fractional variability amplitude due to distributions of hot spots co-orbiting on the accretion disk around a su…