Table 3
Physical properties of the clusters M1–M9 derived from 0
7 apertures centered on the mid-IR peaks.
| Source | Paβ | Brγ | (Brγ)corr | EW(Brγ) | [Ne ii] | 12 μm cont. | AV | NLyc | NO7V | LIR | Age |
| (10-23 W cm-2) | (Å) | (10-21 W cm-2) | (mJy) | (mag) | (1051 s-1) | ( × 103) | (109 L⊙) | (Myr) | |||
|
|
|||||||||||
| M1 | 27.1 ± 4.1 | 12.4 ± 1.9 | 23.5 ± 4.9 | 65.5 ± 3.3 | 25 ± 9 | 184 ± 14 | 8.1 | 7.8 ± 1.6 | 1.4 ± 0.3 | 6.0 | 5.6 |
| M2 | 22.1 ± 3.3 | 9.6 ± 1.4 | 17.6 ± 3.7 | 45.8 ± 2.3 | 21 ± 7 | 111 ± 11 | 7.6 | 5.8 ± 1.2 | 1.0 ± 0.2 | 4.0 | 5.8 |
| M3 | 15.1 ± 2.3 | 7.7 ± 1.2 | 15.4 ± 3.2 | 42.0 ± 2.1 | 15 ± 5 | 49 ± 9 | 9.0 | 5.1 ± 1.1 | 0.9 ± 0.2 | 1.9 | 5.9 |
| M4 | 22.4 ± 3.4 | 9.8 ± 1.5 | 17.9 ± 3.8 | 74.5 ± 3.7 | 18 ± 5 | 47 ± 8 | 7.7 | 5.9 ± 1.2 | 1.1 ± 0.2 | 1.6 | 5.5 |
| M5 | 10.3 ± 1.5 | 4.4 ± 0.7 | 7.9 ± 1.7 | 43.9 ± 2.2 | 7 ± 4 | < 44 | 7.5 | 2.6 ± 0.5 | 0.5 ± 0.1 | 0.9 | 5.8 |
| M6 | 11.3 ± 1.7 | 4.6 ± 0.7 | 8.2 ± 1.7 | 15.4 ± 0.8 | 8 ± 5 | 40 ± 8 | 7.1 | 2.7 ± 0.6 | 0.5 ± 0.1 | 1.0 | 6.3 |
| M7 | 17.7 ± 2.7 | 7.9 ± 1.2 | 14.7 ± 3.1 | 20.4 ± 1.0 | 11 ± 6 | 90 ± 11 | 7.9 | 4.9 ± 1.0 | 0.9 ± 0.2 | 3.3 | 6.2 |
| M8 | 13.3 ± 2.0 | 4.5 ± 0.7 | 7.0 ± 1.5 | 15.5 ± 0.8 | 7 ± 5 | 28 ± 7 | 5.6 | 2.3 ± 0.5 | 0.4 ± 0.1 | 1.1 | 6.3 |
| M9 | 12.1 ± 1.8 | 3.9 ± 0.6 | 5.8 ± 1.2 | 16.8 ± 0.8 | 9 ± 5 | 41 ± 8 | 5.2 | 1.9 ± 0.4 | 0.3 ± 0.1 | 1.4 | 6.3 |
|
|
|||||||||||
| ΣMi | 151.4 ± 22.7 | 64.8 ± 9.7 | 118.0 ± 24.8 | 121 ± 17 | 590 ± 76 | 7.4 | 39.1 ± 8.2 | 7.0 ± 1.5 | 21.3 | 5.9 ± 0.3 | |
| Ring | 2020.8 ± 303.1 | 654.8 ± 98.2 | 1002.0 ± 210.4 | 382 ± 20 | 2326 ± 76 | 5.3 | |||||
Notes. Are given: Paβ, Brγ (both measured and extinction corrected), equivalent widths of Brγ, and the [Ne ii] line, and 12 μm continuum (NeII_1 filter) fluxes. The derived values of extinction AV, number of Lyman-continuum photons NLyc, the equivalent number of O7V stars, the total infrared luminosity, and the approximate cluster ages are also listed. For a discussion of the quoted uncertainties see Sect. 2.
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