On the (Higher Multipoles) Variance Asymmetry in the Cosmic Microwave Background

被引：0
作者：
Jamshidi, Mohammadhossein [1 ]
Banihashemi, Abdolali [1 ,2 ]
Khosravi, Nima [1 ,2 ]
机构：
[1] Shahid Beheshti Univ, Dept Phys, Tehran 1983969411, Iran
[2] Sharif Univ Technol, Dept Phys, Tehran 111559161, Iran
来源：
ASTROPHYSICAL JOURNAL | 2024年 / 972卷 / 01期
关键词：
HEMISPHERICAL POWER ASYMMETRY; WMAP; SKY; ANOMALIES; MAPS;
D O I：
10.3847/1538-4357/ad68ff
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have studied the cosmic microwave background (CMB) map looking for features beyond cosmological isotropy. We began by tiling the CMB variance maps (which are produced by different smoothing scales) with stripes of different sizes along the most prominent dipole direction. We were able to confirm previous findings regarding the significance of the dipole. Furthermore, we discovered that some of the higher multipoles exhibit significance comparable to the dipole that naturally depends on the smoothing scales. In the end, we discussed this result having an eye on the look-elsewhere-effect. We believe our results may indicate an anomalous patch in the CMB sky that warrants further investigation.
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  • [1] Asymmetric sky from the long mode modulations
    Abolhasani, Ali Akbar
    Baghram, Shant
    Firouzjahi, Hassan
    Namjoo, Mohammad Hossein
    [J]. PHYSICAL REVIEW D, 2014, 89 (06):
  • [2] Planck 2015 results XVI. Isotropy and statistics of the CMB
    Ade, P. A. R.
    Aghanim, N.
    Akrami, Y.
    Aluri, P. K.
    Arnaud, M.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Basak, S.
    Battaner, E.
    Benabed, K.
    Benoit, A.
    Benoit-Levy, A.
    Bernard, J. -P
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bonaldi, A.
    Bonavera, L.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Butler, R. C.
    Calabrese, E.
    Cardoso, J. -F.
    Casaponsa, B.
    Catalano, A.
    Challinor, A.
    Chamballu, A.
    Chiang, H. C.
    Christensen, P. R.
    Church, S.
    Clements, D. L.
    Colombi, S.
    Colombo, L. P. L.
    Combet, C.
    Contreras, D.
    Couchot, F.
    Coulais, A.
    Crill, B. P.
    Cruz, M.
    Curto, A.
    Cuttaia, F.
    Danese, L.
    [J]. ASTRONOMY & ASTROPHYSICS, 2016, 594
  • [3] Planck 2018 results: VIII. Gravitational lensing
    Aghanim, N.
    Akrami, Y.
    Ashdown, M.
    Aumont, J.
    Baccigalupi, C.
    Ballardini, M.
    Banday, A. J.
    Barreiro, R. B.
    Bartolo, N.
    Basak, S.
    Benabed, K.
    Bernard, J. -P.
    Bersanelli, M.
    Bielewicz, P.
    Bock, J. J.
    Bond, J. R.
    Borrill, J.
    Bouchet, F. R.
    Boulanger, F.
    Bucher, M.
    Burigana, C.
    Calabrese, E.
    Cardoso, J. -F.
    Carron, J.
    Challinor, A.
    Chiang, H. C.
    Colombo, L. P. L.
    Combet, C.
    Crill, B. P.
    Cuttaia, F.
    de Bernardis, P.
    de Zotti, G.
    Delabrouille, J.
    Di Valentino, E.
    Diego, J. M.
    Dore, O.
    Douspis, M.
    Ducout, A.
    Dupac, X.
    Efstathiou, G.
    Elsner, F.
    Ensslin, T. A.
    Eriksen, H. K.
    Fantaye, Y.
    Fernandez-Cobos, R.
    Finelli, F.
    Forastieri, F.
    Frailis, M.
    Fraisse, A. A.
    Franceschi, E.
    [J]. ASTRONOMY & ASTROPHYSICS, 2020, 641 (641)
  • [4] POWER ASYMMETRY IN WMAP AND PLANCK TEMPERATURE SKY MAPS AS MEASURED BY A LOCAL VARIANCE ESTIMATOR
    Akrami, Y.
    Fantaye, Y.
    Shafieloo, A.
    Eriksen, H. K.
    Hansen, F. K.
    Banday, A. J.
    Gorski, K. M.
    [J]. ASTROPHYSICAL JOURNAL LETTERS, 2014, 784 (02)
  • [5] DIRECTIONAL DEPENDENCE OF ΛCDM COSMOLOGICAL PARAMETERS
    Axelsson, M.
    Fantaye, Y.
    Hansen, F. K.
    Banday, A. J.
    Eriksen, H. K.
    Gorski, K. M.
    [J]. ASTROPHYSICAL JOURNAL LETTERS, 2013, 773 (01)
  • [6] Ginzburg-Landau theory of dark energy: A framework to study both temporal and spatial cosmological tensions simultaneously
    Banihashemi, Abdolali
    Khosravi, Nima
    Shirazi, Amir H.
    [J]. PHYSICAL REVIEW D, 2019, 99 (08)
  • [7] NINE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: FINAL MAPS AND RESULTS
    Bennett, C. L.
    Larson, D.
    Weiland, J. L.
    Jarosik, N.
    Hinshaw, G.
    Odegard, N.
    Smith, K. M.
    Hill, R. S.
    Gold, B.
    Halpern, M.
    Komatsu, E.
    Nolta, M. R.
    Page, L.
    Spergel, D. N.
    Wollack, E.
    Dunkley, J.
    Kogut, A.
    Limon, M.
    Meyer, S. S.
    Tucker, G. S.
    Wright, E. L.
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2013, 208 (02)
  • [8] Blender Online Community, 2023, 3D Modeling and Rendering Package, Blender Foundation, Blender Institute, Amsterdam
  • [9] The pesky power asymmetry
    Dai, Liang
    Jeong, Donghui
    Kamionkowski, Marc
    Chluba, Jens
    [J]. PHYSICAL REVIEW D, 2013, 87 (12):
  • [10] Significance of the largest scale CMB fluctuations in WMAP
    de Oliveira-Costa, A
    Tegmark, M
    Zaldarriaga, M
    Hamilton, A
    [J]. PHYSICAL REVIEW D, 2004, 69 (06): : 12
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