H I lines

The following table lists air wavelengths*1 (in angstrom) and Case B intensities (for Ne=10 000 K, Te=10 000 cm¯³, relative to H beta) for the recombination lines of atomic hydrogen. Wavelengths are from Astrophysical Formulae (Lang, 3rd edition); line intensities are from Hummer & Storey (1987; MNRAS 224, 801).

Lower level
2 (Balmer) 3 (Paschen) 4 (Brackett) 5 (Pfund) 6 (Humphreys)
limit 3646.0   8203.6   14584   22788   32814  
U
p
p
e
r

l
e
v
e
l
9 3835.4 0.0734 9229.0 0.0254 18174 0.0126 32961 0.00725 59066 0.00456
8 3889.1 0.105 9546.0 0.0365 19446 0.0181 37395 0.0104 75005 0.00649
7 3970.1 0.159 10049.4 0.0553 21655 0.0275 46525 0.0158 123680 0.00927
6 4101.7 0.260 10938.1 0.0901 26252 0.0447 74578 0.0245  
5 4340.5 0.469 12818.1 0.162 40512 0.0777  
4 4861.3 1.00 18751.0 0.332  
3 6562.8 2.85  

*1: Until July 3, 2013 it has been erroneously stated that these wavelengths are vacuum wavelengths.



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