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Table 5

Measured integrated line intensity HCO+ (6–5)/HCO+ (8–7) ratios towards our source sample.

Source HCO+ (6–5)/HCO+ (8–7)

VLA1623 3.4(1.2)
L1527 >1.8
L1157-MM >1.1
NGC 1333-IRAS2 1.1(0.5)
Serpens-FIRS 1 1.5(0.3)
L1641 S3 MMS 1 0.9(0.4)
Cep E-mm 2.4(0.8)
IC 1396N 3.0(0.5)
NGC 7129-FIRS2 1.3(0.4)

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