|  Cosmic Microwave Background Features | 
In General
  > s.a. cosmic strings; lensing and
  types of lensing [weak]; perturbations
  [primordial]; Sachs-Wolfe Effect.
  * Anomalies, preferred directions:
    2007, An alignment ("axis of evil") has been reported between the
    quadrupole and octopole moments in the WMAP microwave sky survey, but its significance
    is still being debated; 2013, The variance of the fluctuations appears to be different
    in two opposing hemispheres of the sky, roughly divided along the ecliptic plane; Is
    this a remnant of the preinflationary universe? 2014, The Cold Spot is the most
    significant deviation from gaussianity in the cmb.
  * Circles: They may arise from non-trivial spatial
    topology (> see cosmic topology), or from pre-Big-Bang collisions.
  @ Large-scale anomalies: Inoue S&T-a0710;
    Starkman et al a1201-conf;
    Liddle & Cortês PRL(13)
    + Kamionkowski Phy(13) [model from curvaton mode from negative curvature scale];
    Aslanyan & Easther PRL(13) [causation and correlation];
    Gruppuso & Sagnotti IJMPD(15)-a1506-GRF
      [lack of power at large angular scales and pre-inflationary physics];
    Romano et al a1509 [new one, aligned with cosmic structure];
    Bueno JCAP(16)-a1602 [common origin, framework].
Preferred Directions > s.a. galaxies [dark flow];
  galaxy distribution; polarization.
  @ General references: Land & Magueijo PRL(05)ap,
    PRD(05) [odd parity?];
    Consoli et al ap/06 [vs Great Attractor];
    Helling et al PRD(06)ap;
    Ghosh et al PRD(07)ap/06 [hidden patterns and Bianchi VIIh];
    Basak et al PRD(06);
    Souradeep et al NAR(06)ap [not much evidence];
    Abramo et al PRD(06);
    Land & Magueijo MNRAS(07)ap/06;
    Ackerman et al PRD(07)ap;
    Rakić & Schwarz PRD(07)ap [preferred plane rather than axis];
    Pullen & Kamionkowski PRD(07)-a0709;
    Campanelli et al PRD(07);
    Ho et al PRD(08)-a0801,
    Hirata et al PRD(08)-a0801 [and large-scale structure];
    Carroll et al PRD(10)-a0811
      [effect of translational invariance violation during inflation];
    Tangen PRD-a0910 [super-Hubble inhomogeneity];
    Bennett et al ApJS(11)-a1001 [no compelling evidence for anomalies];
    Pullen & Hirata JCAP(10)-a1003;
    Kovetz et al ApJ(10)-a1005 [giant rings];
    Copi et al AiA(10)-a1004 [rev];
    Kashino et al PRD(12) [anisotropy of mean fluctuation];
    Rassat & Starck A&A(13)-a1303 [no];
    news at(14)mar [is the lopsidedness telling us something].
  @ Hot and cold spots:
    Cruz et al MNRAS(05),
    MNRAS(08)-a0804,
    a0901-proc;
    Gurzadyan & Kocharyan A&A(08)-a0810 [void and Kolmogorov stochasticity parameter];
    Hou et al MNRAS(09)-a0903;
    Masina & Notari JCAP(09)-a0905 [lensing effect on correlation functions];
    Ayaita et al PRD(10)-a0905 [too few spots];
    Granett et al ApJ(10)-a0911 [galaxy counts in cold spot];
    Bernui PRD(09)-a0912;
    Vielva et al MNRAS(11)-a1002 [cold spot and polarization];
    Vielva AiA(10)-a1008 [comprehensive overview];
    Kovetz & Kamionkowski PRL(13)-a1211 [cold spot and 21-cm lensing];
    Bueno PLB(14)-a1405 [the Cold Spot in inhomogeneous inflationary reheating];
    Szapudi et al a1406-proc,
    Nadathur et al PRD(14)-a1408 [the Cold Spot as shadow of a supervoid];
    Naidoo et al MNRAS(16)-a1512 [multiple voids?];
    > s.a. galaxy distribution.
  @ Circles: Gurzadyan & Penrose a1011,
    a1012,
    nat(10)dec [pre-Big-Bang collisions];
    Nelson & Wilson-Ewing PRD(11) [and pre-Big-Bang gravitational-wave pulse];
    Meissner et al PRS(13)-a1207 [evidence for ring-type structures];
    Bielewicz et al MNRAS(12)-a1207 [search for concentric rings];
    Gurzadyan & Penrose EPJP-a1302 [conformal cyclic cosmology and pre-Big-Bang collisions];
    DeAbreu et al JCAP(15)-a1508 [circles are compatible with the standard model].
  @ Related topics:
    Frolop & Scott a1603 [pi in the sky :-)].
The Galactic Foreground and Other Sources
  @ General references:
    Land & Slosar PRD(07)-a0706 [(no) correlation with galactic HI];
    news pw(07)nov [Verschuur's claim];
    Dobler & Finkbeiner ApJ(08)-a0712;
    Ysard et al A&A(10)-a0906;
    Cho & Lazarian ApJ(10)-a1005 [statistical approach];
    Ghosh et al MNRAS(11)-a1006 [foreground maps];
    Delabrouille a1006-proc [component separation];
    Carretti ASP-a1008 [and polarization];
    Bonaldi et al MNRAS(14)-a1407 [removal requirements];
    Czaja & Bromley PRD(14)-a1407 [distortion by the Milky Way];
    Dickinson a1606-proc [rev];
    Chluba et al a1701/MNRAS.
  @ Specific sources: Hansen et al JCAP(12)-a1206 [Kuiper Belt objects];
    von Hausegger et al JCAP(16)-a1511 [footprints of supernova remnant Loop I].
  @ Related topics: Herranz & Vielva IEEE(10)-a1101 [background sources];
    Ichiki PRD(14)-a1406 [testing the zero-mean hypothesis];
    Lavinto & Räsänen JCAP(15)-a1507 [effect of random Swiss Cheese];
    Imara & Loeb a1603 [effect of diffuse intergalactic dust].
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