Dense gas in M 33 (HerM33es) | Astronomy & Astrophysics (A&A)

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Table 3

LTE column densities from the stacked spectra.

	C₂H	HCN	HCO⁺	HOC⁺	HNC	¹³CO(1–0)	¹²CO(1–0)	H₂^a


I [mK km s^-1]	25.1	81.0	110.0	<18.8	13.7	522.0	6280.0	–
N[x]^b	5.10e+12	8.03e+11	2.11e+11	<7.10e+10	4.18e+10	1.80e+15	8.55e+15	8.47e+20
N[x]/N_H₂^c	–8.40	–9.20	–9.78	<–10.25	–1-0.48	–5.85	–5.17	1.00

Notes.

^(a)

Deduced from ¹³CO, see Appendix D;

^(b)

column density;

^(c)

logarithmic values.

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