Now showing items 1-4 of 4

  • Bull, Philip James; Wehus, Ingunn Kathrine; Eriksen, Hans Kristian Kamfjord; Ferreira, Pedro G.; Fuskeland, Unni; Górski, Krzysztof M.; Jewell, J. B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    In addition to primary fluctuations, cosmic microwave background (CMB) temperature maps contain a wealth of additional information in the form of secondary anisotropies. However, secondary effects that can be identified ...
  • Racine, Benjamin; Jewell, J. B.; Eriksen, Hans Kristian Kamfjord; Wehus, Ingunn Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    We propose an efficient Bayesian Markov chain Monte Carlo (MCMC) algorithm for estimating cosmological parameters from cosmic microwave background (CMB) data without the use of likelihood approximations. It builds on a ...
  • Seljebotn, Dag Sverre; Mardal, Kent-Andre; Jewell, J. B.; Eriksen, Hans Kristian Kamfjord; Bull, Philip James (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    We present a multi-level solver for drawing constrained Gaussian realizations or finding the maximum likelihood estimate of the cosmic microwave background sky, given noisy sky maps with partial sky coverage. The method ...
  • Gjerløw, Eirik; Colombo, L. P. L.; Eriksen, Hans Kristian Kamfjord; Górski, Krzysztof M.; Gruppuso, A.; Jewell, J. B.; Plaszczynski, S; Wehus, Ingunn Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    We revisit the problem of exact cosmic microwave background (CMB) likelihood and power spectrum estimation with the goal of minimizing computational costs through linear compression. This idea was originally proposed for ...