Ion | ![]() |
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Layer | Excit. Mech. | Notes/Instrument(s) |
H I, Ly-![]() |
1216 | 84 | 4 | CH | TR; | |
H I, H![]() |
6563 | PH | MLSO; Kitt/Sac; BBSO; | |||
He II | 304 | TR | EIT; | |||
He I | 10830 | |||||
C IV | 1550 | 20 [TR www pg] | 5.0 [Jo69] | TR; | ||
O IV | ![]() |
5.2 | ![]() |
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Na ![]() |
5890 | .8 | PH-CH | |||
Na ![]() |
5896 | .6 | PH-CH | Mt.Wilson; | ||
Ca II H | 3968 | PH-CH | ||||
Ca II K | 3934 | PH-CH | MSO; Kitt/Sac; BBSO; | |||
Ca XV | 5694 | 6.6 [Ja80] | CO | forb [St89] | ``yellow'' corona | |
Fe I | 5250 | PH | Mt.Wilson; | |||
Fe I | 6302 | PH | increasingly used magnetograph doublet | |||
Fe IX/X | 173 | 6.4 [TR www pg] | 6/6.1 [Ar85] | TR | TR; EIT; | |
Fe X | 6374 | 6.1 [Ar85] | CO | forb [St89] | ``red'' corona | |
Fe XII | 195 | 6.5 [TR www pg] | 6.2 [Ja77] | TR | forb | TR; EIT; |
Fe XIV | 5303 | 6.3 [Ja77] | CO | forb [St89] | ``green'' corona | |
Fe XV | 284 | 10.7 [TR www pg] | 6.3 [Ja77] | TR | TR; EIT; | |
Ni I | 6768 | PH | SOI/MDI; GONG [SOHO Instrument Page] |