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Table 5

13CO peak main beam temperature line ratios.

System 6–5/3–2 6–5/4–3 10–9/3–2 10–9/4–3 10–9/6–5

Wide multiples
L1448N 0.26 ± 0.07 0.04 ± 0.004 0.15 ± 0.04
IRAS 7a 0.48 ± 0.02 0.02 ± 0.004 0.03 ± 0.01
PER8+PER55 0.31 ± 0.01 0.02 ± 0.003 0.07 ± 0.01

Close binaries
IRAS 1 0.29 ± 0.06 0.02 ± 0.01 0.07 ± 0.02
IRAS 03282
IRAS 03292 <0.11 <0.03

Singles

IRAS 03271 <0.02
Per25
SK1 <0.19 <0.02

Notes. (a)Includes only Per18 and Per21.

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