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Major  Spectral  Emission  Lines

(Lines emitted by gases at low pressure, eg, in nebulae)

(nm = angstroms / 10)

 

Click here for graphs

A spreadsheet with all of the objects listed below and a few more can be found here

Table: Visible Wavelengths. Major photographic lines, ie, bright lines, are in large bold

light pollution lines [sodium, mercury] are in italics

Intensities are normalized to Hb = 100. "nd", no data available.

Notes (1, etc) are given below.

 

Element

 

State

Wave-

length (A)(1)

Color

(2)

M42

(3)

NGC2392

(4)

NGC7009

(4)

NGC2440

(4)

Hg

nd

4050

V

nd

nd

nd

nd

S

II

4068

V

nd

nd

3

nd

N

III

4097

V

nd

nd

nd

nd

H

Delta

4101

V

25 18 20 20

He

I

4143

V

nd nd nd nd

K[]

V

4163

V

nd nd nd nd

He

II

4199

V

nd nd nd nd

Fe

V

4227

V

nd nd nd nd

C

II

4267

B

nd nd 1 nd

H

Gamma

4340

B

39 47 40 40
Hg nd 4360 B nd nd nd nd

O

III

4363

B

nd 23 8 22

He

I

4471

B

nd 3 4 3

He

II

4541

B

nd nd nd 2

Fe

III

4607

B

nd nd nd nd

N

III

4640

B

nd nd nd nd

He

II

4686

B

nd 29 7 61

He

I

4712

B

nd nd nd nd

Ar

IV

4712

B

nd nd nd nd

Ar

IV

4740

B

nd 2 3 7

H

Beta

4861

B

100 100 100 100

Fe

III

4931

G

nd nd nd nd

O

III

4931

G

nd nd nd nd

O

III

4959

G

112 451 417 622

O

III

5007

G

348 1406 500 1790

He

II

5411

G

nd nd 1 5
Hg nd 5460 G nd nd nd nd

Cl

III

5517

G

nd nd 0.5 nd

Cl

III

5537

G

nd 1 0.6 nd
Na nd 5700 G nd nd nd nd
Hg nd 5790 Y nd nd nd nd
Na nd 5830 Y nd nd nd nd

He

I

5876

Or

31 11 19 12
Na nd 6000 nd nd nd nd nd

K

IV

6101

Or

nd nd nd nd

O

I

6300

Or

nd nd 0.5 33

S

III

6312

Or

nd 5 2 nd

Mn

V

6393

Or

nd nd nd nd

He

II

6406

Or

nd nd nd nd

Ar

V

6435

Or

nd nd nd nd

N

II

6548

R

nd 56 10 418

H

Alpha

6563

R

33 395 373 464

N

II

6584

R

52 160 31 1236

He

I

6678

R

26 3 5 4

S

II

6717

R

nd 9 2 8

S

II

6723

R

nd nd nd nd

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Notes:

1 extracted from Kaler,  Stars & Their Spectra,  p228-9)

2 From CRC Handbook, page E204

  UV < 4000 Angstroms (A)

  V 4000-4240; 4100

  B 4240-4912; 4700

  G 4912-5750; 5200

  Max visibility = 5560

  Y 5750-5850; 5800

  Or 5850-6470; 6000

  R 6470-7000; 6500

  IR > 7000

3 Intensities of emission nebular lines (arbitrary units), estimated

  from AMOACP, figure 7.4; Trapezium region of M42.

4 Intensities of planetary nebular lines (arbitrary units), from

  http://home.achilles.net/~jtalbot/data/nebula/

  (NGC 2392 = Eskimo; NGC 7009 = Saturn nebula)

 

Additional sources:

http://www.rdcrisp.darkhorizons.org/spectra_of_planetary_nebulae_page.htm

 

 

 

Ultraviolet Wavelengths

 Element

State

Wavelength (A)(1)

Color

(2)

O

III

3132

Uv

He

I

3187

Uv

He

II

3203

Uv

O

III

3299

Uv

O

III

3312

Uv

O

III

3340

Uv

Ne

III

3342

Uv

Ne

V

3425

Uv

O

III

3425

Uv

O

III

3444

Uv

H

21

3679

Uv

O

II

3727

Uv

O

III

3760

Uv

H

10

3797

Uv

H

9

3835

Uv

Ne

III

3868

Uv

H

8

3889

Uv

He

II

3923

Uv

H

7

3968

Uv

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