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Fig. 5


Regions of the disk used for the classification of molecules according to their spatial distributions at the final time of the simulations (5.83 × 104 yr): the inner regions (n ≳ 1012 cm−3, T ≳ 100 K, red), the spiral arms (n ≲ 1011 cm−3, T ≲ 40 K, blue), and the transition region (1011 cm−3n ≲ 1012 cm−3, 40 K ≲T ≲ 100 K, green).

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