Browsing Institutt for teoretisk astrofysikk by Author "Górski, K.M."

Now showing items 1-2 of 2

  • Cosmic Birefringence from the Planck Data Release 4 
    Diego-Palazuelos, P.; Eskilt, Johannes Røsok; Minami, Y.; Tristram, M.; Sullivan, R. M.; Banday, A. J.; Barreiro, R. B.; Eriksen, Hans Kristian Kamfjord; Górski, K.M.; Keskitalo, R.; Komatsu, E.; Martínez-González, E.; Scott, D.; Vielva, P.; Wehus, Ingunn Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We search for the signature of parity-violating physics in the cosmic microwave background, called cosmic birefringence, using the Planck data release 4. We initially find a birefringence angle of β=0.30°±0.11° (68% C.L.) ...
  • Improved limits on the tensor-to-scalar ratio using BICEP and Planck data 
    Tristram, M.; Banday, A.J.; Górski, K.M.; Keskitalo, R.; Lawrence, C.R.; Andersen, Kristian Joten; Barreiro, R.B.; Borrill, J.; Colombo, L.P.L.; Eriksen, Hans Kristian Kamfjord; Fernandez-Cobos, R.; Kisner, T.S.; Martínez-González, E.; Partridge, B.; Scott, D.; Svalheim, Trygve Leithe; Wehus, Ingunn Kathrine (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
    We present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 (BK18) and Planck PR4 data allowing us to fit for r consistently with the six parameters of the ΛCDM model. We discuss the ...