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Table 1
Fraction of passive rings according to different star formation indicators and for different Hubble stage ranges.
| Indicator | All types | S0 | Early sp. | Late sp. |
| −3 ≤ T ≤ 9 | −3 ≤ T ≤ 0 | 1 ≤ T ≤ 2 | 3 ≤ T ≤ 9 | |
|
|
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| FUV | 10 ± 2% | 32 ± 5% | 11 ± 3% | 0% |
| Deep FUV | 13 ± 3% | 36 ± 8% | 15 ± 5% | 0% |
| FUV (Hα) | 8 ± 2% | 16 ± 7% | 16 ± 6% | 0% |
| Hα | 13 ± 3% | 48 ± 10% | 16 ± 6% | 0% |
Notes.Deep FUV stands for GALEX FUV imaging excluding images from the AIS survey. FUV (Hα) stands for the FUV statistics assembled from galaxies with available Hα images.
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