326 citations
- Galaxies, Etoiles, Physique et InstrumentationFR20 papers
- Centre National de la Recherche ScientifiqueFR14 papers
- Trieste Astronomical ObservatoryIT12 papers
- Université Paris CitéFR11 papers
- Observatoire de ParisFR10 papers
- National Institute for AstrophysicsIT9 papers
- Délégation Paris 7FR8 papers
- Janssen (France)FR8 papers
- European Southern ObservatoryCL7 papers
- University of California, BerkeleyUS6 papers
- Leibniz Institute for Astrophysics PotsdamDE5 papers
- Consejo Superior de Investigaciones CientíficasES4 papers
11 papers · 1 filter
First Stars XI. Chemical composition of the extremely metal-poor dwarfs in the binary CS 22876--032
J. I. González Hernández, P. Bonifacio, H. -G. Ludwig +15
We have used high-resolution, high-S/N ratio spectra from the UVES spectrograph at the ESO VLT telescope. Long-term radial-velocity measurements and broad-band photometry allow us…
Integral-field spectroscopy of a Lyman-Break Galaxy at z=3.2: evidence for merging
N. P. H. Nesvadba, M. D. Lehnert, R. I. Davies +2
We present spatially-resolved, rest-frame optical spectroscopy of a z~3 Lyman-break galaxy (LBG), Q0347-383 C5, obtained with SINFONI on the VLT. This galaxy, among the ~10% bright…
AEGIS: New Evidence Linking Active Galactic Nuclei to the Quenching of Star Formation
Kevin Bundy, Antonis Georgakakis, Kirpal Nandra +10
Utilizing Chandra X-ray observations in the All-wavelength Extended Groth Strip International Survey (AEGIS) we identify 241 X-ray selected Active Galactic Nuclei (AGNs, L > 10^{42…
Line shift, line asymmetry, and the 6Li/7Li isotopic ratio determination
Roger Cayrel, Matthias Steffen, Hum Chand +6
Context: Line asymmetries are generated by convective Doppler shifts in stellar atmospheres, especially in metal-poor stars, where convective motions penetrate to higher atmospheri…
The solar photospheric abundance of phosphorus: results from co5bold 3D model atmospheres
Elisabetta Caffau, Matthias Steffen, Luca Sbordone +2
aims: We determine the solar abundance of phosphorus using co5bold 3D hydrodynamic model atmospheres. method: High resolution, high signal-to-noise solar spectra of the PI lines of…
The isotopic 6Li/7Li ratio in Cen X-4 and the origin of Li in X-ray binaries
J. Casares, P. Bonifacio, J. I. Gonzalez Hernandez +2
Context: Cool stars, companions to compact objects, are known to show Li abundances which are high compared to field stars of the same spectral type, which are heavily Li depleted.…