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.2

As Table D.1 for B1/B2.

B1/B2	n × 10⁷			n 10⁸			n 10⁹


	Fast	Medium	Slow	Fast	Medium	Slow	Fast	Medium	Slow
CH₃OH	>21 800	>85 000	>415 000	>22 200	>87 000	>425 000	>22 800	>89 000	>435 000
C₂H₅OH	>22 900	90 000–93 000	425 000–445 000	>23 300	91 000–95 000	435 000–450 000	24 000–26 000	93 800–97 500	440 000–465 000
CH₃CHO	21 700–23 800	81 500–91 300	330 000–410 000	23 000–24 800	83 000–95 000	405 000–425 000	22 600–29 000	94 500–97 500	460 000–480 000
CH₃OCHO	>25 000	75 500–78 500⋆	360 000–375 000	21 900–22 000⋆	90 000–90 600⋆	455 000–475 000⋆	21 000–21 500	91 000–92 000*	445 000⋆
CH₃CN	19 000–20 000	74 500–75 500	360 000–365 000	22 100–22 200	85 000–85500	407 000–410 000	22 600–22 900	87 600–88 000	418 000–420 000
CH₂CHCN	10⁻¹²–10⁻¹¹	10⁻¹²–10⁻¹¹	10⁻¹¹–10⁻¹⁰	10⁻¹³	10⁻¹²	10⁻¹²	10⁻¹⁴–10⁻¹³	6 × 10⁻¹⁴–10⁻¹³	8 × 10⁻¹³–5 × 10⁻¹²
C₂H₅CN	10⁻¹⁴–10⁻¹²	10⁻¹⁴–5 × 10⁻¹³	10⁻¹³–10⁻¹²	10⁻¹⁵–10⁻¹⁴	10⁻¹⁵–10⁻¹⁴	10⁻¹⁴	10⁻¹⁷–10⁻¹⁵	7 × 10⁻¹⁶	10⁻¹⁴
HC₃N	20 000–21 800	79 500–84 000	365 000–405 000	21 000–22 300	82 400–86800	400 000–420 000	21 600–22 900	84 900–89 500	410 000–432 000

Best time period fit	20 000–25 000	75 500–90 000	365 000–425 000	22 000–23 300	85 500–91 000	410 000–455 000	21 500–24 000	88 000–94 500	420 000–460 000
Temperatures (K)	81–123	76–105	75–98	96–107	95–107	92–111	92–114	100–114	96–113
Limiters	CH₃CN-CH₃OCHO	CH₃CN-C₂H₅OH	CH₃CN-C₂H₅OH	CH₃OCHO-C₂H₅OH	CH₃CN-C₂H₅OH	CH₃CN-CH₃OCHO	CH₃OCHO-C₂H₅OH	CH₃CN-CH₃CHO	CH₃CN-CH₃CHO

Notes. Because vinyl and ethyl cyanide were not detected, the rows for CH₂ CHCN and C₂ H₅CN are the model abundances for the time period. The star symbol indicates that more than one time range fits the observed abundance.

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