Feedback from OB stars on their parent cloud: gas exhaustion rather than gas ejection

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Table 5

Total amount of mass that can escape.

Region	Mass escape	Mass escape	Mass escape ^(a)
	¹³CO (M_⊙)	NH₃ (M_⊙)	N₂H⁺ (M_⊙)
Active	2120 ± 730	570 ± 120	680 ± 310
Quiescent	1610 ± 760	750 ± 180
Total %	21% ^(b)	7%	4%

Notes. ^(a) The mass that can escape is a lower estimate since we were unable to calculate the escape fraction where the N₂ H⁺ observationsare missing. ^(b)Percentage used for ¹³CO uses ¹³CO derived H₂ column density.

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