Complex cyanides as chemical clocks in hot cores | Astronomy & Astrophysics (A&A)

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Volume 616 (August 2018)

A&A, 616 (2018) A67

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Table D.1

Approximate time period (in years) during which the modeled abundance range matches the observed abundance range for B3.






B3	n × 10⁷			n 10⁸			n 10⁹


	Fast	Medium	Slow	Fast	Medium	Slow	Fast	Medium	Slow
CH₃OH	22 250–22 300	86 000–87 000	420 000–430 000	22 700–22 800	88 000–89 000	439 000	23 200–23 300	91 000–91 500	445 000–450 000
C₂H₅OH	23 400–23 600	91 000–91 500	430 000–440 000	23 800–24 000	92 800–93 400	440 000	24 500–24 700	95 700–96 000	455 000
CH₃CHO	22 800–23 800	85 000–91 500	405 000–410 000	24 000–24 800	86 700–89 000⋆	415 000–420 000	23 200–29 000	96 000–97 500	43 5000⋆
CH₃OCHO	†	89 000⋆	365 000–375 000	21 600–21 900	90 000⋆	470 000–475 000⋆	>21 300	99 000–101 000⋆	485 000–495 000⋆
CH₃CN	>22 000	>84 000	>405 000	>22 500	>87 000	>417 000	>23 300	>89 700	>430 000
CH₂CHCN	>28 500	95 200–130 000	440 000–475 000	>29 000	97 600–141 000	470 000–485 000	>34 000	100 000–145 000	480 000–500 000
C₂H₅CN	†	97 500–98 500	475 000	†	>102 000	490 000	†	>103 000	500 000
HC₃N	21 600–21 800	84 000–84 500	400 000–405 000	22 100–22 300	86 000–87 000	418 000–420 000	22 700–23 000	89 000–89 600	430 000–435 000

Best time period fit	no fit	84 500–97 500	375 000–475 000	no fit	87 000–102 000	420 000–490 000	no fit	89 600–103 000	435 000–500 000
Temperatures (K)	95–158	93–116	78–120	96–164	98–133	96–127	105–223	104–134	102–132
Limiters	HC₃N-C₂H₃CN	HC₃N-C₂H₅CN	CH₃OCHO-C₂H₅CN	CH₃OCHO-CH₂CHCN	HC₃N-C₂H₅CN	HC₃N-C₂H₅CN	HC₃N-CH₂CHCN	HC₃N-C₂H₅CN	HC₃N-C₂H₅CN

Notes. The star symbol indicates that more than one time range fits the observed abundance. The dagger symbol indicates that the observed abundance is not reached by the model (too low).

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