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11 papers · 1 filter
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…
Are Antiprotons Forever?
M. H. Holzscheiter, X. Feng, T. Goldman +4
Up to one million antiprotons from a single LEAR spill have been captured in a large Penning trap. Surprisingly, when the antiprotons are cooled to energies significantly below 1 e…
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…
Three-body halos. III. Effects of finite core-spin
D. V. Fedorov, E. Garrido, A. S. Jensen
We investigate effects of finite core-spin in two-neutron halos in the three-body model consisting of two neutrons and a core. The states in the neutron-core subsystem can then hav…