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- Ludwig-Maximilians-Universität MünchenDE1.8k papers
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15 papers · 2 filters
Primordial Nucleosynthesis with Massive Tau Neutrinos
J. B. Rehm, G. G. Raffelt, A. Weiss
A massive long-lived tau neutrino in the MeV regime modifies the primordial light-element abundances predicted by big-bang nucleosynthesis (BBN) calculations. This effect has been…
Reduction of Weak Interaction Rates in Neutron Stars by Nucleon Spin Fluctuations: Degenerate Case
Georg Raffelt, Thomas Strobel
Nucleon spin fluctuations in a dense medium reduce the ``naive'' values of weak interaction rates (neutrino opacities, neutrino emissivities). We extend previous studies of this ef…
An icosahedron-based method for pixelizing the celestial sphere
Max Tegmark
For power spectrum estimation it's important that the pixelization of a CMB sky map be smooth and regular to high degree. With this criterion in mind the ``COBE sky cube" was defin…
Supernova Neutrino Opacities
Georg G. Raffelt
In a supernova (SN) core during infall and after collapse, neutrinos are trapped by their interactions with nucleons. For the axial-vector current interactions it is not enough to…
Is lensing of point sources a problem for future CMB experiments?
Max Tegmark, Jens Villumsen
Weak gravitational lensing from large-scale structure enhances and reduces the fluxes from extragalactic point sources with an rms amplitude of order 15%. In cosmic microwave backg…
A high-resolution map of the cosmic microwave background around the north celestial pole
Max Tegmark, Angelica de Oliveira-Costa, Marc Devlin +3
We present a Wiener filtered map of the Cosmic Microwave Background (CMB) fluctuations in a disk with 15 degree diameter, centered at the North Celestial Pole. The map is based on…