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- Centre National de la Recherche ScientifiqueFR640 papers
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6 papers · 2 filters
Optical appearance of the gravitational lens system B0218+35.7
F. Grundahl, J. Hjorth
We present high-resolution CCD images (FWHM=0.6"-0.7") of the compact gravitational lens system B0218+35.7 obtained at the Nordic Optical Telescope. Using aperture and PSF photomet…
Inversions in astronomy and the SOLA method
F. P. Pijpers
This paper was presented at the Institute for Mathematics and its Applications workshop "Inverse problems in wave propagation" and will appear in the series IMA volumes (Springer).…
Neutrino decoupling in the early Universe
Steen Hannestad, Jes Madsen
A calculation of neutrino decoupling in the early Universe, including full Fermi-Dirac statistics and electron mass dependence in the weak reaction rates, is presented. We find tha…
Discovery of a faint optical jet in 3C 120
J. Hjorth, M. Vestergaard, A. N. Sorensen +1
We report the detection of an optical jet in the nearby Seyfert 1 radio galaxy 3C 120. The optical jet coincides with the well-known radio jet and emits continuum radiation (B,V',I…
MORE ON SOLAR-LIKE OSCILLATIONS IN ETA BOO
T. R. Bedding, H. Kjeldsen
We recently reported strong evidence for solar-like oscillations in the G0 IV star eta Boo (Kjeldsen et al. 1995, AJ 109, 1313). We measured small temperature fluctuations produced…
Mixed dark matter with neutrino chemical potentials
Georg B. Larsen, Jes Madsen
Mixed dark matter models with one low-mass (e.g. 2.4eV) neutrino flavor are shown to be in good agreement with observations if the neutrinos have non-zero chemical potentials. This…