H I line observations of 151 evolved stars made with the Nançay Radio Telescope - II. Analysis of the H I and H2 content of AGB star circumstellar envelopes

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Table 3

Stars with the lowest and highest H₂:H I mass ratios.

Name	M_FIR/M_HI IRAS, Herschel	T_eff (K)	Var.	Chem.
Objects with the lowest ratios (M_FIR/M_HI < 3)
RW Boo	0.3, ...	3148	SRb	O
V1942 Sgr	0.9, ...	2960	Lb	C
V1943 Sgr	0.9, 1.1	2752	Lb	O
X Her	0.9, 1.4	3281	SRb	O
Y CVn	1.7, 3.5	2760	SRb	C
RY Dra	2.3, ...	2810	SRb	C
Y UMa	2.2, ...	...	SRb	O
AQ Sgr	2.7:, 2.7:	2790	SRb	C
Objects with the highest ratios (M_FIR/M_HI > 30)
U Hya	359, 131	2965	SRb	C
IRC+10216	240, 59	2200	Mira	C
o Cet	86, 46	2500	Mira	O
W Hya	..., >36	...	SRa	O

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