Table 1.
Results of the least-squares fits of the cross-power spectra of the MeerKAT H I IM maps and the WiggleZ galaxy at redshift z ≈ 0.4.
| Method | Nfg | 𝒯 | ΩH I bH Ir × 103 | χd.o.f.2 | significance |
|---|---|---|---|---|---|
| SVD | 4 | no | 0.63 ± 0.13 | 0.78 | 3.9σ |
| SVDw | 4 | no | 0.75 ± 0.16 | 0.91 | 4.4σ |
| PCA | 4 | no | 0.50 ± 0.16 | 1.15 | 3.3σ |
| PCAw | 4 | no | 0.79 ± 0.17 | 0.98 | 4.7σ |
| mSVD | 4, 8 | no | 0.91 ± 0.17 | 0.99 | 5.6σ |
| mSVDw | 4, 8 | no | 0.86 ± 0.17 | 1.01 | 5.3σ |
| mPCA | 4, 8 | no | 0.93 ± 0.17 | 0.99 | 5.8σ |
| mPCAw | 4, 8 | no | 0.87 ± 0.17 | 0.97 | 5.4σ |
| CL23 | 30 | yes | 0.86 ± 0.16 | 0.84 | 4.8σ |
Notes. Each row corresponds to a different cleaning strategy. Being limited by signal loss, the highest amplitudes are the closest-to-truth, although all amplitude values agree within ≲2σ. In bold, we highlight: PCA and PCAw to bracket the PCA-like results, mPCA as representative of the multiscale solutions and our benchmark from CL23 (last row), which corresponds to a weighted PCAw with different pre-processing choices and a transfer function correction applied.
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.