508 citations
- Universität HamburgDE46 papers
- National Institute for Subatomic PhysicsNL12 papers
- Centre National de la Recherche ScientifiqueFR11 papers
- Heidelberg UniversityDE11 papers
- University of ZurichCH10 papers
- European Organization for Nuclear ResearchCH9 papers
- Joint Institute for Nuclear ResearchRU9 papers
- Leiden UniversityNL9 papers
- Max Planck Institute for PhysicsDE9 papers
- Humboldt-Universität zu BerlinDE8 papers
- Institute for High Energy PhysicsES8 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT8 papers
4 papers · 1 filter
Fluctuations of the intergalactic UV background towards two lines of sight
C. Fechner, D. Reimers
We present a reanalysis of the HeII Lyman alpha absorption towards the quasars HS1700+6416 and HE2347-4342 using new high S/N, optical observations. An alternative analysis method…
Carbon Enhanced Metal-Poor Stars. I. Chemical Compositions of 26 Stars
Wako Aoki, Timothy C. Beers, Norbert Christlieb +3
The chemical compositions of 26 metal-poor stars that exhibit strong CH and/or C2 molecular bands are determined based on high-resolution spectroscopy. We define carbon-enhanced st…
The M Dwarf GJ 436 and its Neptune-Mass Planet
H. L. Maness, G. W. Marcy, E. B. Ford +5
We determine stellar parameters for the M dwarf GJ 436 that hosts a Neptune-mass planet. We employ primarily spectral modeling at low and high resolution, examining the agreement b…
A Measurement of the Psi' to J/psi Production Ratio in 920 GeV Proton-Nucleus Interactions
B Collaboration
Ratios of the Psi' over the J/psi production cross sections in the dilepton channel for C, Ti and W targets have been measured in 920 GeV proton-nucleus interactions with the HERA-…