Table 25
Summary of the best-fit power dipole directions on the sky up to ℓmax = 600/1500, for each of the four component separation methods, together with the 143 GHz map cleaned using the SEVEM method and denoted SEVEM-143.
| Frac. | |||||
| Method | Mask | (l,b) [°] |  [°] |
|
ℓ max |
|
|
|||||
| C-R ........ | U73 | (231, −2) | 86.7 | 493/500 | 1500 |
| NILC ........ | U73 | (214, 4) | 85.7 | 500/500 | 1500 |
| SEVEM ........ | U73 | (215, 9) | 85.8 | 500/500 | 1500 |
| SMICA ........ | U73 | (220, 4) | 86.2 | 499/500 | 1500 |
| SEVEM-143 ........ | U73 | (228, −1) | 86.7 | 496/500 | 1500 |
| SEVEM-143DB ........ | U73 | (218, −21) | 87.6 | 487/500 | 1500 |
| WMAP-9 ........ | KQ85 | (209, −24) | 82.3 | 9966/10 000 | 600 |
| C-R ........ | U73 | (192, −5) | 81.7 | 500/500 | 600 |
| NILC ........ | U73 | (194, −3) | 80.8 | 500/500 | 600 |
| SEVEM ........ | U73 | (195, −2) | 81.2 | 500/500 | 600 |
| SMICA ........ | U73 | (196, −2) | 81.9 | 500/500 | 600 |
| SEVEM-143 ... | U73 | (195, 3) | 81.6 | 500/500 | 600 |
| SEVEM-143DB .. | U73 | (189, −10) | 81.9 | 500/500 | 600 |
Notes. These are determined from maps of the power spectrum estimated on 12 non-overlapping patches in bins of 16 multipoles. The preferred direction is the mean of the separate 16-multipole dipole directions in the range ℓ = 2 to ℓmax. The angle θmean is the mean separation angle between all possible pair-wise combinations of these 16-multipole dipoles over the same ℓ range. The p-value for the power asymmetry is given by the fraction of simulations with a larger mean separation angle, 
, than the observed data, . SEVEM-143DB corresponds to data corrected for Doppler boosting, while all other results are derived without this correction. In fact, due to the frequency dependence of this effect, deboosting is not important for the WMAP data. For the Planck analysis, 500 FFP6 simulations were analysed, while 10 000 Gaussian simulations were used to study the WMAP data.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.