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Table 3
Physical conditions of the H i-emitting gas for the main decrement-profile combinations, as suggested by comparison with models.
| Decrement | Profile | T (K) | log nHI(cm-3) | # of objects | Comments |
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| 1 | W, MP | ... | ... | 3 | only in sub-luminous sources; probably reddened type 2 decrements |
| 2-A | NS | 5000–15 000 | 9.4–9.8 | 11 | optically thin, weakest accretors |
| 2-A | W, MP | 5000–15 000 | 9.4–9.8 | 9 | ... |
| 3 | W, MP | ? | ? | 7 | decrements not reproduced by models |
| 4-B | W, MP | ≲9000 | ≳11 | 6 | optically thick, very wide profiles, strongest accretors |
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