Table 2: HI emission parameters.
Object V^a Velocity range $\Delta v_{20}^{b}$ $\Delta v_{50}$ ^c $T_{\rm max}$ ^d log(M(HI)/ $M_{\odot}$ )^e

(km s^-1) (km s^-1) (km s^-1) (km s^-1) (K)

H31A 4090 4021-4180 169.2 169.2 13.6 9.30

H31B 4122 4042-4222 190.6 126.3 13.6 9.28^(g)

t-C 4095 4074-4095 52.9 21.3 6.3 8.00

H31C 3984 3936-4021 85.8 64.3 20.0 9.20

H31G 4005 3937-4064 128.7 42.9 20.1 9.28

H31Q 4090 4053-4138 84.9 42.4 9.8 8.95

A0500-0434 3952 3852-4053 233.1 233.1 9.5 9.04

t-E 4080 4042-4138 107.5 63.2 6.8 9.41

t-S 4016 3936-4116 190.8 126.8 20.5 9.81

H31F 3968 3937-4011 74.6 63.8 19.1 8.78

t-NE 4111 4085-4117 84.9 42.4 7.9 8.48

t-NW 4048 4000-4064 85.0 63.3 18.3 9.59

Total DnC 4059 232.7 148.3 20.5 10.37

Total CnB 4053 3937-4222 222.3 158.6 20.5 9.99

Total single dish^f 4041 212 147 0.2 10.20

^a
Central velocity at 20% of the peak emission in the integrated spectra obtained from the DnC array data, except for H31F and t-C, only resolved in the CnB array.
^b
Line width measured at 20% of the peak emission in the same data indicated in ^a.
^c
Line width measured at 50% of the peak emission in the same data indicated in ^a.
^d
Peak temperature measured in the same data indicated in ^a.
^e
M(HI) = $2.36\times 10^5\times D({\rm Mpc})^2 \times S_{\rm HI}\Delta V$ (Jy km s^-1), where D = 54.3 Mpc and $S_{\rm HI}\Delta V$ is the integrated emission in the same data indicated in ^a.
^f
Obtained from Williams & Rood (1987).
^g
The calculated mass includes the emission from t-C unresolved with the DnC-array data. The t-C mass is given below based on the CnB data.

**Table 2:** HI emission parameters.
Object	V^a	Velocity range	$\Delta v_{20}^{b}$	$\Delta v_{50}$ ^c	$T_{\rm max}$ ^d	log(M(HI)/ $M_{\odot}$ )^e
	(km s^-1)	(km s^-1)	(km s^-1)	(km s^-1)	(K)
H31A	4090	4021-4180	169.2	169.2	13.6	9.30
H31B	4122	4042-4222	190.6	126.3	13.6	9.28^(g)
t-C	4095	4074-4095	52.9	21.3	6.3	8.00
H31C	3984	3936-4021	85.8	64.3	20.0	9.20
H31G	4005	3937-4064	128.7	42.9	20.1	9.28
H31Q	4090	4053-4138	84.9	42.4	9.8	8.95
A0500-0434	3952	3852-4053	233.1	233.1	9.5	9.04
t-E	4080	4042-4138	107.5	63.2	6.8	9.41
t-S	4016	3936-4116	190.8	126.8	20.5	9.81
H31F	3968	3937-4011	74.6	63.8	19.1	8.78
t-NE	4111	4085-4117	84.9	42.4	7.9	8.48
t-NW	4048	4000-4064	85.0	63.3	18.3	9.59
Total DnC	4059		232.7	148.3	20.5	10.37
Total CnB	4053	3937-4222	222.3	158.6	20.5	9.99
Total single dish^f	4041		212	147	0.2	10.20

Source LaTeX | All tables | In the text

	1 Introduction
	2 Observations
	3 The members and environment of HCG 31
	4 The galaxies
	5 Intragroup material
	6 Discussion
	7 Conclusions
	References