@Article{SantosCaViBaViWu:2014:QuAsAn,
               author = "Santos, L. and Cabella, P. and Villela, Thyrso and Balbi, A. and 
                         Vittorio, N. and Wuensche, Carlos Alexandre",
          affiliation = "{Universit{\`a} di Roma tor Vergata} and {Universit{\`a} di Roma 
                         tor Vergata} and {Instituto Nacional de Pesquisas Espaciais 
                         (INPE)} and {Universit{\`a} di Roma tor Vergata} and 
                         {Universit{\`a} di Roma tor Vergata} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)}",
                title = "Quadrant asymmetry in the angular distribution of cosmic microwave 
                         background in the Planck satellite data",
              journal = "Astronomy \& Astrophysics",
                 year = "2014",
               volume = "569",
             keywords = "Cosmic background radiation, Cosmic microwave backgrounds, 
                         Cosmology: observation, Methods:data analysis, 
                         Methods:statistical, Planck satellites.",
             abstract = "Some peculiar features found in the angular distribution of the 
                         cosmic microwave background (CMB) measured by the Wilkinson 
                         Microwave Anisotropy Probe (WMAP) deserve further investigation. 
                         Among these peculiar features is the quadrant asymmetry, which is 
                         likely related to the north-south asymmetry. In this paper, we aim 
                         to extend the analysis of the quadrant asymmetry in the CDM 
                         framework to the Planck foreground-cleaned maps, using the mask 
                         provided by Planck team. We compute the two-point correlation 
                         function (TPCF) from each quadrant of the Planck CMB sky maps, and 
                         compare the result with 1000 Monte Carlo (MC) simulations 
                         generated assuming the CDM best-fit power spectrum. We detect the 
                         presence of an excess of power in the southeastern quadrant (SEQ) 
                         and a significant lack of power in the northeastern quadrant (NEQ) 
                         in the Planck data. Asymmetries between the SEQ and the other 
                         three quadrants (southwestern quadrant (SWQ), northwestern 
                         quadrant (NWQ), and NEQ) are each in disagreement with an 
                         isotropic sky at a 95% confidence level. Furthermore, by rotating 
                         the Planck temperature sky map with respect to z direction, we 
                         showed the rotation angle where the TPCF of the SEQ has its 
                         maximal power. Our analysis of the Planck foreground-cleaned maps 
                         shows that there is an excess of power in the TPCF in the SEQ and 
                         a significant lack of power in the NEQ when compared with 
                         simulations. This asymmetry is anomalous when considering the CDM 
                         framework.",
                  doi = "10.1051/0004-6361/201322943",
                  url = "http://dx.doi.org/10.1051/0004-6361/201322943",
                 issn = "0004-6361 and 1432-0746",
                label = "scopus 2014-11 SantosCaViBaViWu:2014:QuAsAn",
             language = "en",
        urlaccessdate = "25 abr. 2024"
}