Table 2.
Statistical analysis of galaxy-filament alignment signals for spiral and elliptical galaxies within various absolute luminosity (M) ranges.
| Luminosity selection | Ngal | ⟨σ⟩ | σ⟨cosθ⟩ | pKS |
|---|---|---|---|---|
| Spirals | ||||
| −19.86 ≤ M | 8129 | 0.855 (Fig. 6.1) | 1.856 (Fig. 6.1A) | 2.8 × 10−1 |
| −20.76 ≤ M < −19.86 | 8129 | 1.171 (Fig. 6.2) | 0.491 (Fig. 6.2A) | 6.0 × 10−1 |
| −21.48 ≤ M < −20.76 | 8129 | 1.263 (Fig. 6.3) | 1.283 (Fig. 6.3A) | 2.3 × 10−2 |
| M < −21.48 | 8130 | 0.709 (Fig. 6.4) | 1.924 (Fig. 6.4A) | 1.9 × 10−1 |
| Ellipticals | ||||
| −20.99 ≤ M | 4739 | 1.393 (Fig. 7.1) | 2.492 (Fig. 7.1A) | 3.6 × 10−2 |
| −21.69 ≤ M < −20.99 | 4739 | 1.471 (Fig. 7.2) | 4.809 (Fig. 7.2A) | 9.1 × 10−7 |
| −22.20 ≤ M < −21.69 | 4739 | 2.092 (Fig. 7.3) | 7.084 (Fig. 7.3A) | 4.6 × 10−8 |
| M < −22.20 | 4738 | 3.107 (Fig. 7.4) | 11.524 (Fig. 7.4A) | 9.7 × 10−18 |
Notes. Columns indicate: (1) Luminosity selection range (in absolute magnitude); (2) Number of galaxies in each bin (Ngal); (3) Alignment signal Significance (⟨σ⟩), indicating the overall alignment strength; (4) Significance from Mean of Alignment signal (σ⟨cosθ⟩), quantifying the deviation of the observed alignment from random expectations in standard deviation units; and (5) Kolmogorov–Smirnov test p value (pKS), assessing the likelihood of the alignment signal arising by chance.
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