N-bearing complex organics toward high-mass protostars - Constant ratios pointing to formation in similar pre-stellar conditions across a large mass range

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Table E.4

The references for column densities used in the column density ratio plots and the calculation of the scatter.

Source	CH₃CN	C₂H₃CN	C₂H₅CN	HNCO
IRAS16293 A	Calcutt et al. (2018)	–	Calcutt et al. (2018)	Ligterink et al. (2017)
IRAS16293 B	Calcutt et al. (2018)	Calcutt et al. (2018)	Calcutt et al. (2018)	Ligterink et al. (2017)
S68N	Nazari et al. (2021)	–	Nazari et al. (2021)	Nazari et al. (2021)
B1-c	Nazari et al. (2021)	–	Nazari et al. (2021)	Nazari et al. (2021)
NGC 1333 IRAS 4A2	López-Sepulcre et al. (2017)	–	López-Sepulcre et al. (2017)	—
HH212	–	–	–	—
L483	–	–	–	—
SMM1-a	Ligterink et al. (2021)	–	–	Ligterink et al. (2021)
NGC 6334I MM1	Bøgelund et al. (2019b)	–	–	—
NGC 6334I MM2	Bøgelund et al. (2019b)	–	–	—
Orion BN/KL A	Cernicharo et al. (2016)	–	Cernicharo et al. (2016)	Cernicharo et al. (2016)
Orion BN/KL B	Cernicharo et al. (2016)	–	Cernicharo et al. (2016)	Cernicharo et al. (2016)
AFGL 4176	Bøgelund et al. (2019a)	Bøgelund et al. (2019a)	Bøgelund et al. (2019a)	Bøgelund et al. (2019a)
G10.6 Core 1	Law et al. (2021)	Law et al. (2021)	Law et al. (2021)	Law et al. (2021)
G10.6 Core 2	Law et al. (2021)	Law et al. (2021)	Law et al. (2021)	Law et al. (2021)
W43-MM1	Molet et al. (2019)	–	Molet et al. (2019)	—
G10.47+0.03	–	–	–	Gorai et al. (2020)
G31.41+0.31	–	–	–	Colzi et al. (2021)
NGC 6334I MM1-v	–	–	–	Ligterink et al. (2020)
Sgr B2(N2)	Belloche et al. (2016)	Belloche et al. (2016)	Belloche et al. (2016)	Belloche et al. (2017)
G+0.693	Zeng et al. (2018)	–	–	Zeng et al. (2018)

Source	NH₂CHO	CH₃NH₂	CH₃OH

IRAS16293 A	Manigand et al. (2020)	–	Ligterink et al. (2017)
IRAS16293 B	Coutens et al. (2016)	–	Jørgensen et al. (2018)
S68N	Nazari et al. (2021)	–	van Gelder et al. (2020)
B1-c	Nazari et al. (2021)	–	van Gelder et al. (2020)
NGC 1333 IRAS 4A2	López-Sepulcre et al. (2017)	–	–
HH212	Lee et al. (2019)	–	Lee et al. (2019)
L483	Jacobsen et al. (2019)	–	Jacobsen et al. (2019)
SMM1-a	–	–	Ligterink et al. (2021)
NGC 6334I MM1	Bøgelund et al. (2019b)	Bøgelund et al. (2019b)	Bøgelund et al. (2018)
NGC 6334I MM2	Bøgelund et al. (2019b)	Bøgelund et al. (2019b)	Bøgelund et al. (2018)
Orion BN/KL A	Cernicharo et al. (2016)	–	Cernicharo et al. (2016)
Orion BN/KL B	Cernicharo et al. (2016)	Cernicharo et al. (2016)	Cernicharo et al. (2016)
AFGL 4176	Bøgelund et al. (2019a)	–	Bøgelund et al. (2019a)
G10.6 Core 1	Law et al. (2021)	–	Law et al. (2021)
G10.6 Core 2	Law et al. (2021)	–	Law et al. (2021)
W43-MM1	Molet et al. (2019)	–	Molet et al. (2019)
G10.47+0.03	Gorai et al. (2020)	–	–
G31.41+0.31	Colzi et al. (2021)	–	–
NGC 6334I MM1-v	Ligterink et al. (2020)	–	–
Sgr B2(N2)	Belloche et al. (2017)	–	Belloche et al. (2016)
G+0.693	Zeng et al. (2018)	Zeng et al. (2018)	–

Notes. If no reference is presented here, it indicates that either no value was found or the value given in a study was not used in this work for various reasons such as the column density found from optically thick lines. The values for the last source are only used when considering ratios including CH₃NH₂.

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