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Fig. 6
Variation of the predicted abundances of PN, PO, HCP, CP and PH3 over 107 yr in our best-fit model. The dashed lines represent the 3σ upper limits derived from the observations at vLSR = −17 km s−1. In the case of PO we use 5 × 10−10 as an upper limit (see Table 9 and text for explanation).
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