Browsing Research Articles (Earth Sciences) by Author "Akrami, Yashar"

Now showing items 1-10 of 10

    • Planck 2018 results: I. Overview and the cosmological legacy of Planck 

      Aghanim, Nabila; Akrami, Yashar; Arroja, Frederico (EDP Sciences, 2020)
      The European Space Agency’s Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between ...

    • Planck 2018 results: II. low frequency Instrument data processing 

      Akrami, Yashar; Argüeso, Francisco; Ashdown, Mark A.J. (EDP Sciences, 2020)
      We present a final description of the data-processing pipeline for the Planck Low Frequency Instrument (LFI), implemented for the 2018 data release. Several improvements have been made with respect to the previous release, ...

    • Planck 2018 results: III. High frequency instrument data processing and frequency maps 

      Akrami, Yashar; Arroja, Frederico; Ashdown, Mark A.J. (EDP Sciences, 2020)
      This paper presents the High Frequency Instrument (HFI) data processing procedures for the Planck 2018 release. Major improvements in mapmaking have been achieved since the previous Planck 2015 release, many of which were ...

    • Planck 2018 results: IV. Diffuse component separation 

      Akrami, Yashar; Ashdown, Mark A.J.; Aumont, Jonathan (EDP Sciences, 2020)
      We present full-sky maps of the cosmic microwave background (CMB) and polarized synchrotron and thermal dust emission, derived from the third set of Planck frequency maps. These products have significantly lower contamination ...

    • Planck 2018 results: V. CMB power spectra and likelihoods 

      Aghanim, Nabila; Akrami, Yashar; Ashdown, Mark A.J. (EDP Sciences, 2020)
      We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid ...

    • Planck 2018 results: VI. Cosmological parameters 

      Aghanim, Nabila; Akrami, Yashar; Ashdown, Mark A.J. (EDP Sciences, 2020)
      We present cosmological parameter results from the final full-mission Planck measurements of the cosmic microwave background (CMB) anisotropies, combining information from the temperature and polarization maps and the ...

    • Planck 2018 results: VII. Isotropy and statistics of the CMB 

      Akrami, Yashar; Ashdown, Mark A.J.; Aumont, Jonathan (EDP Sciences, 2020)
      Analysis of the Planck 2018 data set indicates that the statistical properties of the cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using the 2013 and 2015 data ...

    • Planck 2018 results: VIII. Gravitational lensing 

      Aghanim, Nabila; Akrami, Yashar; Ashdown, Mark A.J. (EDP Sciences, 2020)
      We present measurements of the cosmic microwave background (CMB) lensing potential using the final Planck 2018 temperature and polarization data. Using polarization maps filtered to account for the noise anisotropy, we ...

    • Planck 2018 results: X. Constraints on inflation 

      Akrami, Yashar; Arroja, Frederico; Ashdown, Mark A.J. (EDP Sciences, 2020)
      We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic microwave background (CMB) anisotropy measurements. The results are fully consistent with those reported using the data from the ...

    • Planck 2018 results: XII. Galactic astrophysics using polarized dust emission 

      Aghanim, Nabila; Akrami, Yashar; Alves, Marta I.R. (EDP Sciences, 2020)
      Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky ...