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Table 1.
Summary of the global or resolved properties of GHz-SFs when compared to nGHz-SFs.
| Empirical properties | Behavior of GHz-SFs compared to nGHz-SFs | Resolved | Global |
|---|---|---|---|
| Star formation rates | Identical or very similar | ✓ | ✓ |
| [O III] velocity dispersion | Excess at all annuli | ✓ | |
| Outflow detection rate | Central and off-nuclear excess | ✓ | |
| [N II] BPT | Central and off-nuclear excess | ✓ | |
| D4000 stellar index | Inverted, slightly younger in the center | ✓ | |
| Redshift or distance to the target | Similar | ✓ | |
| Galaxy morphology | Earlier T-Types | ✓ | |
| Wise colors (W1-W3, W2-W3) | Redder colors | ✓ | |
| 144 MHz morphology | More compact semi-major axis size (norm) | ✓ | |
| 5th nearest neighbor | Similar, but slightly closer neighbors | ✓ | |
| Modeled properties | |||
| Stellar masses | Identical or very similar | ✓ | ✓ |
| Star formation rates | Identical or very similar | ✓ | ✓ |
| Stellar population ages | Inverted, slightly younger in the center | ✓ | |
| Central metallicity | Higher in the central regions | ✓ | |
| Stellar extinction | Excess at all annuli | ✓ | |
| Look-back time of 90% mass assembly | Earlier, faster | ✓ | |
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