A λ = 3 mm molecular line survey of NGC 1068 - Chemical signatures of an AGN environment

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Table 3

Molecular line ratios in NGC 1068 and comparison with the isotopic ratios in other galaxies.

NGC 1068		GC	M 82
J−J′ = 1−0

¹²CO/¹³CO = 12.6	}
H¹²CO⁺/H¹³CO⁺ = 17.1
HN¹²C/HN¹³C = 23.3		¹²C/¹³C ~ 20−25^g	¹²C/¹³C > 138^e
H¹²CN/H¹³CN = 16.1
¹²CN/¹³CN = 49.1
C¹⁶O/C¹⁸O = 176.8^a		¹⁶O/¹⁸O = 250^c	¹⁶O/¹⁸O > 350^e
C³²S/C³⁴S = 5.2^b		³²S/³⁴S ~ 22^d	³²S/³⁴S = 20^f

Notes.

^(a)

See details in Sect. 4.3 about how this value was calculated;

^(b)

using data from the literature (see Table 1 for references);

^(c)

Wilson & Rood (1994);

^(d)

Frerking et al. (1980);

^(e)

Martín et al. (2010), using C₂H and its two C-isotopologues;

^(f)

Martín et al. (2009) and Aladro et al. (2011a);

^(g)

Wannier (1980).

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