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Infrared Line Lists

 We present here lists of some of the more important atomic and molecular lines in the infrared. It is by no means exhaustive.

Table 12.9: Recombination Lines of Atomic Hydrogen: Paschen Series1

Transition

(Nu - Nl)

Vacuum Wavelength

(microns)

Vacuum Frequency

(cm -1)

I/I(Hbeta)

Te=Ne=104
4-3

 1.8756

 5531.55

 0.332

5-3

 1.2822

 7799.33

 0.162

6-3

 1.0941

 9139.8

 0.0901

7-3

 1.0052

 9948.1

1 Intensities from Hummer & Storey, MNRAS 224, 801.

Table 12.10: Recombination Lines of Atomic Hydrogen: Brackett Series

Transition

(Nu-Nl)

Vacuum Wavelength

(microns)

Frequency

(cm -1)

I/I(H)

Te=104
5-4

 4.5225

 2467.765

 0.0777

6-4

 2.6259

 3808.25

7-4

 2.1661

 4616.61

 0.0275

8-4

 1.9451

 5141.14

 0.0181

9-4

 1.8181

 5500.8

 0.0126

10-4

 1.7367

 5758.1

 0.00909

11-4

 1.6811

 5948.45

 0.00679

12-4

 1.6412

 6093.22

 0.00521

13-4

 1.6114

 6205.9

 0.00409

14-4

 1.5885

 6295.3

 0.00327

15-4

 1.5705

 6367.4

 0.00266

16-4

 1.5561

 6426.4

 0.00220

17-4

 1.5443

 6475.3

 0.00184

18-4

 1.5346

 6516.3

 0.00156

19-4

 1.5265

 6551.0

 0.00133

20-4

 1.5196

 6580.7

 0.00116

series limit

 1.459

 6855.

Table 12.11: HeI and HeII Lines

ID

Transition

(µm)
HeI

 7F-3D,3Fo-3D

 1.0031

HeI

 7F-3D,1Fo-1D

 1.0034

HeII

 14-6

 1.0049

HeII

 5-4

 1.0133

HeI

 6D-3P,3dD-3Po

 1.0314

HeII

 13-6

 1.0422

HeI

 6S-3P,3S-3Po

 1.0668

HeI

 2P-2S,3Po-3S,GU=3

 1.0832

HeI

 2P-2S,3Po-3P,GU=1

 1.0832

HeI

 2P-2S,3Po-3S,GU=5

 1.0833

HeI

 2P-2S,3Po-3S,GU=9

 1.0833

HeI

 6P-3D,1Po-1d

 1.0905

HeI

 6F-3D,3Fo-3D

 1.0916

HeI

 6F-3D,1Fo-1D

 1.0920

HeII

 12-6

 1.0938

HeI

 6P-3D,3Po-3D

 1.0997

HeI

 5P-3S,1Po-1S

 1.1016

HeI

 6D-3P,1D-1Po

 1.1048

HeII

 7LIMIT

 1.1164

HeI

 6S-3P,1S-1Po

 1.1229

HeII

 7-5

 1.1628

HeII

 11-6

 1.1677

HeI

 5D-3P,3D-3Po

 1.1972

HeII

 21-7

 1.2256

HeII

 22-7

 1.2418

HeI

 4P-3S,3Po-3S

 1.2531

HeII

 20-7

 1.2719

HeI

 5P-3D,1Po-1D

 1.2759

HeI

 5F-3D,3Fo-3D

 1.2789

HeII

 10-6

 1.2817

HeI

 5S-3P,3S-3Po

 1.2850

HeII

 19-7

 1.2914

HeI

 5D-3P,1D-1Po

 1.2971

HeI

 5F-3D,1Fo-1D

 1.2976

HeI

 5P-3D,3Po-3D

 1.2988

HeII

 18-7

 1.3150

HeI

 5S-3P,1S-1Po

 1.3415

HeII

 17-7

 1.3442

HeII

 15-7

 1.4273

HeII

 8LIMIT

 1.4578

HeII

 9-6

 1.4765

HeII

 14-7

 1.4882

HeI

 4P-3S,1Po-1S

 1.5088

HeII

 13-7

 1.5719

HeII

 25-8

 1.6241

HeII

 24-8

 1.6400

HeII

 23-8

 1.6584

HeII

 22-8

 1.6799

HeII

 12-7

 1.6926

HeI

 4D-3P,3D-3Po

 1.7007

HeII

 21-8

 1.7053

HeII

 20-8

 1.7355

HeII

 19-8

 1.7717

HeII

 18-8

 1.8167

HeII

 9LIMIT

 1.8450

HeI

 4P-3D,1Po-1D

 1.8561

HeII

 6-5

 1.8639

HeI

 4F-3D,3Fo-3D

 1.8691

HeI

 4F-3D,1Fo-1d

 1.8702

HeII

 17-8

 1.8725

HeII

 8-6

 1.8753

HeII

 11-7

 1.8770

HeI

 8S-4P,3S-3Po

 1.9068

HeI

 4D-3P,1D-1Po

 1.9094

HeI

 4P-3D,3Po-3D

 1.9548

HeII

 15-8

 2.0379

HeI

 6P-4S,3Po-3S

 2.0430

HeI

 2P-2S,1Po-1S

 2.0587

HeI

 4S-3P,3S-3Po

 2.1126

HeI

 3pP-4sS

 2.1132

HeI

 4S-3P,1S-1Po

 2.1138

HeII

 25-9

 2.1195

HeII

 24-9

 2.1469

HeI

 7S-4P,3S-3Po

 2.1500

HeI

 7F-4D,3Fo-3D

 2.1614

HeI

 4dD-7fF

 2.1617

HeI

 7F-4D,1Fo-1D

 2.1623

HeII

 14-8

 2.1653

HeI

 4-7

 2.166

HeII

 23-9

 2.1786

HeI

 7D-4P,1D-1Po

 2.1847

HeII

 10-7

 2.1891

HeII

 22-9

 2.2155

HeI

 7S-4P,1S-1Po

 2.2290

HeII

 21-9

 2.2601

HeII

 10LIMIT

 2.2778

HeI

 6P-4S,1Po-1S

 2.3069

HeII

 20-9

 2.314

HeII

 13-8

 2.348

HeII

 19-9

 2.3788

HeII

 18-9

 2.4606

HeI

 6D-4P,3D-3Po

 2.4734

Table 12.12: CO Vibration-rotation Band-heads1

12C16O

Vacuum Wavelength

(microns)

Frequency

(cm -1)

13C16O

Vacuum Wavelength

(microns)

Frequency

(cm -1)
2-0

 2.2935

 4360.1

 2.3448

 4264.7

3-1

 2.3227

 4305.4

 2.3739

 4212.4

4-2

 2.3535

 4250.8

 2.4037

 4160.3

5-3

 2.3829

 4196.5

 2.4341

 4108.3

6-4

 2.4142

 4142.2

 2.4652

 4056.4

7-5

 2.4461

 4088.2

 2.4971

 4004.7

8-6

 2.4787

 4034.3

9-7

 2.5122

 3980.5

3-0

 1.5582

 6417.8

4-1

 1.5780

 6337.2

5-2

 1.5982

 6257.2

6-3

 1.6187

 6177.7

7-4

 1.6397

 6098.8

8-5

 1.6610

 6020.5

1 All of the delta v = 2 bandheads occur near J=50.

Table 12.13: Important H2 Lines1

Line Name

Wavel
(µm)

Freq
(cm-1)

g(J)

Eupper

(K)

A
(10e-7s)

LTE I(line)/I(1-0S(1))

1000K

2000K

3000K

4000K
1-0

 S(0)

 2.2235

 4497.41

 5

 6471

 2.53

 0.27

 0.21

 0.19

 0.19

1-0

 S(1)

 2.1218

 4712.91

 21

 6956

 3.47

 1.00

 1.00

 1.00

 1.00

1-0

 S(2)

 2.0338

 4917.01

 9

 7584

 3.98

 0.27

 0.37

 0.42

 0.44

1-0

 S(3)

 1.9576

 5108.40

 33

 8365

 4.21

 0.51

 1.02

 1.29

 1.45

1-0

 S(4)

 1.8920

 5282.52

 13

 9286

 4.19

 0.082

 0.26

 0.39

 0.47

1-0

 S(5)

 1.8358

 5447.25

 45

 10341

 3.96

 0.096

 0.52

 0.91

 1.21

1-0

 S(6)

 1.7880

 5592.9

 17

 11522

 3.54

 0.010

 0.10

 0.21

 0.31

1-0

 S(7)

 1.7480

 5720.8

 57

 12817

 2.98

 0.008

 0.15

 0.40

 0.65

1-0

 S(8)

 1.7147

 5831.9

 21

 14221

 2.34

 0.001

 0.022

 0.074

 0.14

1-0

 S(9)

 1.6877

 5925.1

 69

 15722

 1.68

 0.025

 0.11

 0.22

1-0

 S(10)

 1.6665

 6000.0

 25

 17311

 1.05

 0.003

 0.015

 0.034

1-0

 S(11)

 1.6504

 6059.0

 81

 18979

 0.53

 0.002

 0.014

 0.037

1-0

 Q(1)

 2.4066

 4155.25

 9

 6149

 4.29

 1.05

 0.70

 0.61

 0.57

1-0

 Q(2)

 2.4134

 4143.47

 5

 6471

 3.03

 0.30

 0.23

 0.22

 0.21

1-0

 Q(3)

 2.4237

 4125.87

 21

 6956

 2.78

 0.70

 0.70

 0.70

 0.70

1-0

 Q(4)

 2.4375

 412.57

 9

 7586

 2.65

 0.15

 0.21

 0.23

 0.24

1-0

 Q(5)

 2.4548

 4073.72

 33

 8365

 2.55

 0.24

 0.49

 0.62

 0.70

1-0

 Q(6)

 2.4756

 4039.5

 13

 9286

 2.45

 0.036

 0.12

 0.17

 0.21

1-0

 Q(7)

 2.5001

 3999.9

 45

 10341

 2.34

 0.042

 0.11

 0.40

 0.53

3-2

 S(0)

 2.5014

 3997.73

 5

 17387

 3.88

 0.001

 0.007

 0.016

3-2

 S(1)

 2.3864

 4190.33

 21

 17818

 5.14

 0.006

 0.035

 0.087

3-2

 S(2)

 2.2870

 4372.49

 9

 18386

 5.63

 0.002

 0.014

 0.037

3-2

 S(3)

 2.2014

 4542.57

 33

 19086

 5.63

 0.006

 0.043

 0.12

3-2

 S(4)

 2.1280

 4699.32

 13

 19912

 5.22

 0.001

 0.012

 0.036

3-2

 S(5)

 2.0656

 4841.3

 45

 20856

 4.50

 0.003

 0.023

 0.088

3-2

 S(6)

 2.0130

 4967.7

 17

 21911

 3.57

 0.006

 0.021

3-2

 S(7)

 1.9692

 5078.1

 57

 23069

 2.54

 0.001

 0.010

 0.038

4-3

 S(3)

 2.3446

 4265.4

 21

4-3

 S(4)

 2.2668

 4411.5

 9

4-3

 S(5)

 2.201

 4543.5

 33

5-4

 S(5)

 2.3555

 4245.4

 45

5-4

 S(7)

 2.2510

 4442.5

 57

2-0

 S(0)

 1.2383

 8075.3

 5

 12095

 1.27

 0.001

 0.012

 0.028

 0.043

2-0

 S(1)

 1.1622

 8604.2

 21

 12550

 1.90

 0.004

 0.061

 0.15

 0.23

2-0

 S(2)

 1.1382

 8785.5

 9

 13150

 2.38

 0.001

 0.025

 0.070

 0.12

2-0

 S(3)

 1.1175

 8948.6

 33

 13890

 2.77

 0.002

 0.074

 0.24

 0.43

2-0

 S(4)

 1.0998

 9092.4

 13

 14764

 3.07

 0.021

 0.078

 0.15

2-0

 S(5)

 1.0851

 9215.5

 45

 15763

 3.28

 0.001

 0.048

 0.21

 0.44

2-9

 Q(1)

 1.2383

 8075.3

 9

 11789

 1.94

 0.003

 0.037

 0.082

 0.12

2-0

 Q(2)

 1.2419

 8051.9

 5

 12095

 1.38

 0.001

 0.012

 0.029

 0.045

2-0

 Q(3)

 1.2473

 8017.2

 21

 12550

 1.29

 0.002

 0.039

 0.098

 0.24

2-0

 Q(4)

 1.2545

 7971.1

 9

 13150

 1.27

 0.001

 0.012

 0.033

 0.056

2-0

 Q(5)

 1.2636

 7913.3

 33

 13890

 1.23

 0.001

 0.024

 0.093

 0.17

2-0

 O(2)

 1.2932

 7732.6

 1

 11635

 3.47

 0.001

 0.008

 0.016

 0.024

2-0

 O(3)

 1.3354

 7488.3

 9

 11789

 1.61

 0.003

 0.028

 0.063

 0.094

2-0

 O(4)

 1.3817

 7237.5

 5

 12095

 1.03

 0.001

 0.008

 0.020

 0.030

2-0

 O(5)

 1.4322

 6982.5

 21

 12550

 0.698

 0.001

 0.018

 0.046

 0.074

1 Energy levels calculated using Dabrowski & Herzberg, Can J Phys 62, 1639 (1984). Einstein coefficients from Turner et al. ApJ Suppl 35, 281 (1977).


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