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Table 7

Number of YSOs and star-formation rate in each subregion.

Region N(YSOs) SFR YSO [ M yr-1 ]

Aquila/W40 88–115 (22.0–28.8) × 10-6
Aquila/Serp S 57–139 (14.2–34.8) × 10-6
Aquila/cold 11–15 (2.8–3.8) × 10-6
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Aquila (total) 156–269 (39.0–67.3) × 10-6

Oph/main (L1688) 60–112 (15.0–28.0) × 10-6
Oph/cold 0–0
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Oph (total) 60–112 (15.0–28.0) × 10-6

Orion B/NGC2023 9–15 (2.2–3.8) × 10-6
Orion B/NGC2024 37–55 (9.2–13.8) × 10-6
Orion B/NGC2068 6–12 (1.5–3.0) × 10-6
Orion B/NGC2071 26–43 (6.5–10.8) × 10-6
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Orion B (total) 78–125 (19.5–31.3) × 10-6

Notes.

(†)

Number of YSOs in each subregion observed in HCN, HCO+, H13CN, and H13CO+. The lower value gives the number of Class II YSOs, the upper value the combined number of Class 0/I, Flat, and Class II YSOs.

(‡)

The uncertainties are statistical uncertainties, where N is the number count.

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