The ALMA-PILS survey: Stringent limits on small amines and nitrogen-oxides towards IRAS 16293–2422B

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Table 3

Comparison of CH₃NH₂ abundances at one beam offset around source B.

Source	CH₃NH₂ /CH₂ NH	CH₃NH₂ /NH₂CHO	CH₃NH₂/CH₃OH	Reference
IRAS 16293–2422B	≤0.88	≤0.053	≤5.3 × 10⁻⁵	This work

Sgr B2	~1	0.57	0.017	Turner (1991)
Sgr B2(M)	31	3.2	0.008	Belloche et al. (2013)
Sgr B2(N)	0.75	0.43	0.034	Belloche et al. (2013)
Sgr B2(N)	5.5	–	–	Halfen et al. (2013)
Sgr B2(N)	7.1	2.1	0.1	Neill et al. (2014)

Hot core model	–	1.1–1.7	0.034–0.13	Garrod et al. (2008)^a
Hot core model	0.5–7.3	0.2–2.3	1.8−7.3 × 10⁻³	Garrod (2013)^a

Notes. ^(a) Abundance ranges taken from the F(ast), M(edium), and S(low) warm-up models.

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