Table 2. Open in new tab The line...

Source	RA^a	Dec.^a	Continuum	Velocity	Line	Line	Brightness
IC 860
Centre	03.504	07.79	4.04	3490, 3640, 3830, 3990	(3.30), 1.90, 2.80, 1.90	(0.62), 0.34, 0.46, 0.34	3.01 – 5.23
South-east	03.516	07.67	0.20	3520, 3720, 3870	0.71, 0.79, 1.34	1.26, 1.37, 1.90	2.23 – 4.16
IRAS 15107+0724
Centre	13.097	31.92	6.61	3760, 3910	1.45, 1,18	0.20, 0.16	4.22, 3.43
South	13.093	31.58	0.50	3460, 3710, 3900,4050	0.80, 0.95, 0.66, 0.28	0.95, 1.06, 0.84, 0.44	0.56 – 1.92
North-west	13.082	32.03	0.22	3710, 4030	0.80, 1.00	1.53, 1.71	3.23, 4.04
Arp 220 West
W-centre	57.191	11.66	20.3	5230	2.20	0.10	5.28
W-south	57.191	11.58	5.12	5230, 5360	1.03, 0.76	0.18, 0.14	3.37, 2.48
W-west	57.181	11.76	5.19	5140, 5230, 5340	1.30, 1.38, 1.75	0.22, 0.24, 0.29	10.06, 13.43
W-north	57.192	11.80	4.62	5090, 5280	1.30, 1.55	0.28, 0.29	3.89, 4.64
Arp 220 East
E-east	57.265	11.53	6.18	5430	1.05	0.16	3.14
E-west	57.258	11.45	7.84	5160, 5320, 5400, 5540	2.20, 1.80, 1.75, 1.20	0.14 – 0.24	2.88 – 5.28

Source

RA^a

Dec.^a

Continuum

Velocity

Line

Brightness

component

flux^b

flux

optical depth^c

temperature T_b

(s)

( arcsec)

(mJy b⁻¹)

(km s⁻¹)

(mJy b⁻¹)

(10⁴ K)

IC 860

Centre

03.504

07.79

4.04

3490, 3640, 3830, 3990

(3.30), 1.90, 2.80, 1.90

(0.62), 0.34, 0.46, 0.34

3.01 – 5.23

South-east

03.516

07.67

0.20

3520, 3720, 3870

0.71, 0.79, 1.34

1.26, 1.37, 1.90

2.23 – 4.16

IRAS 15107+0724

Centre

13.097

31.92

6.61

3760, 3910

1.45, 1,18

0.20, 0.16

4.22, 3.43

South

13.093

31.58

0.50

3460, 3710, 3900,4050

0.80, 0.95, 0.66, 0.28

0.95, 1.06, 0.84, 0.44

0.56 – 1.92

North-west

13.082

32.03

0.22

3710, 4030

0.80, 1.00

1.53, 1.71

3.23, 4.04

Arp 220 West

W-centre

57.191

11.66

20.3

5230

2.20

0.10

5.28

W-south

57.191

11.58

5.12

5230, 5360

1.03, 0.76

0.18, 0.14

3.37, 2.48

W-west

57.181

11.76

5.19

5140, 5230, 5340

1.30, 1.38, 1.75

0.22, 0.24, 0.29

10.06, 13.43

W-north

57.192

11.80

4.62

5090, 5280

1.30, 1.55

0.28, 0.29

3.89, 4.64

Arp 220 East

E-east

57.265

11.53

6.18

5430

1.05

0.16

3.14

E-west

57.258

11.45

7.84

5160, 5320, 5400, 5540

2.20, 1.80, 1.75, 1.20

0.14 – 0.24

2.88 – 5.28

Source	RA^a	Dec.^a	Continuum	Velocity	Line	Line	Brightness
IC 860
Centre	03.504	07.79	4.04	3490, 3640, 3830, 3990	(3.30), 1.90, 2.80, 1.90	(0.62), 0.34, 0.46, 0.34	3.01 – 5.23
South-east	03.516	07.67	0.20	3520, 3720, 3870	0.71, 0.79, 1.34	1.26, 1.37, 1.90	2.23 – 4.16
IRAS 15107+0724
Centre	13.097	31.92	6.61	3760, 3910	1.45, 1,18	0.20, 0.16	4.22, 3.43
South	13.093	31.58	0.50	3460, 3710, 3900,4050	0.80, 0.95, 0.66, 0.28	0.95, 1.06, 0.84, 0.44	0.56 – 1.92
North-west	13.082	32.03	0.22	3710, 4030	0.80, 1.00	1.53, 1.71	3.23, 4.04
Arp 220 West
W-centre	57.191	11.66	20.3	5230	2.20	0.10	5.28
W-south	57.191	11.58	5.12	5230, 5360	1.03, 0.76	0.18, 0.14	3.37, 2.48
W-west	57.181	11.76	5.19	5140, 5230, 5340	1.30, 1.38, 1.75	0.22, 0.24, 0.29	10.06, 13.43
W-north	57.192	11.80	4.62	5090, 5280	1.30, 1.55	0.28, 0.29	3.89, 4.64
Arp 220 East
E-east	57.265	11.53	6.18	5430	1.05	0.16	3.14
E-west	57.258	11.45	7.84	5160, 5320, 5400, 5540	2.20, 1.80, 1.75, 1.20	0.14 – 0.24	2.88 – 5.28

Table 2.

Open in new tab

The line emission components.

Source	RA^a	Dec.^a	Continuum	Velocity	Line	Line	Brightness
component			flux^b		flux	optical depth^c	temperature T_b
	(s)	( arcsec)	(mJy b⁻¹)	(km s⁻¹)	(mJy b⁻¹)		(10⁴ K)
IC 860
Centre	03.504	07.79	4.04	3490, 3640, 3830, 3990	(3.30), 1.90, 2.80, 1.90	(0.62), 0.34, 0.46, 0.34	3.01 – 5.23
South-east	03.516	07.67	0.20	3520, 3720, 3870	0.71, 0.79, 1.34	1.26, 1.37, 1.90	2.23 – 4.16
IRAS 15107+0724
Centre	13.097	31.92	6.61	3760, 3910	1.45, 1,18	0.20, 0.16	4.22, 3.43
South	13.093	31.58	0.50	3460, 3710, 3900,4050	0.80, 0.95, 0.66, 0.28	0.95, 1.06, 0.84, 0.44	0.56 – 1.92
North-west	13.082	32.03	0.22	3710, 4030	0.80, 1.00	1.53, 1.71	3.23, 4.04
Arp 220 West
W-centre	57.191	11.66	20.3	5230	2.20	0.10	5.28
W-south	57.191	11.58	5.12	5230, 5360	1.03, 0.76	0.18, 0.14	3.37, 2.48
W-west	57.181	11.76	5.19	5140, 5230, 5340	1.30, 1.38, 1.75	0.22, 0.24, 0.29	10.06, 13.43
W-north	57.192	11.80	4.62	5090, 5280	1.30, 1.55	0.28, 0.29	3.89, 4.64
Arp 220 East
E-east	57.265	11.53	6.18	5430	1.05	0.16	3.14
E-west	57.258	11.45	7.84	5160, 5320, 5400, 5540	2.20, 1.80, 1.75, 1.20	0.14 – 0.24	2.88 – 5.28

Source	RA^a	Dec.^a	Continuum	Velocity	Line	Line	Brightness
component			flux^b		flux	optical depth^c	temperature T_b
	(s)	( arcsec)	(mJy b⁻¹)	(km s⁻¹)	(mJy b⁻¹)		(10⁴ K)
IC 860
Centre	03.504	07.79	4.04	3490, 3640, 3830, 3990	(3.30), 1.90, 2.80, 1.90	(0.62), 0.34, 0.46, 0.34	3.01 – 5.23
South-east	03.516	07.67	0.20	3520, 3720, 3870	0.71, 0.79, 1.34	1.26, 1.37, 1.90	2.23 – 4.16
IRAS 15107+0724
Centre	13.097	31.92	6.61	3760, 3910	1.45, 1,18	0.20, 0.16	4.22, 3.43
South	13.093	31.58	0.50	3460, 3710, 3900,4050	0.80, 0.95, 0.66, 0.28	0.95, 1.06, 0.84, 0.44	0.56 – 1.92
North-west	13.082	32.03	0.22	3710, 4030	0.80, 1.00	1.53, 1.71	3.23, 4.04
Arp 220 West
W-centre	57.191	11.66	20.3	5230	2.20	0.10	5.28
W-south	57.191	11.58	5.12	5230, 5360	1.03, 0.76	0.18, 0.14	3.37, 2.48
W-west	57.181	11.76	5.19	5140, 5230, 5340	1.30, 1.38, 1.75	0.22, 0.24, 0.29	10.06, 13.43
W-north	57.192	11.80	4.62	5090, 5280	1.30, 1.55	0.28, 0.29	3.89, 4.64
Arp 220 East
E-east	57.265	11.53	6.18	5430	1.05	0.16	3.14
E-west	57.258	11.45	7.84	5160, 5320, 5400, 5540	2.20, 1.80, 1.75, 1.20	0.14 – 0.24	2.88 – 5.28

Notes. (a) Positions of IC 860 relative to RA = 13^h15^m and Dec. = 24°37^΄. Positions of IRAS 15107+0724 relative to RA = 15^h13^m and Dec. = 07°13^΄. Positions for Arp 220 relative to RA = 15^h34^m and Dec. = 23°30^΄. (b) The continuum flux density represents a mean value across the emission region. (c) The line optical depth assumes exponential amplification of the background radio continuum.

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