Simplified energy level diagram for the S+ ion.
Variation of the [SII] 6717 / 6731 line ratio with density (for T = 10,000 K).
Figures from Peterson's AGN book (via Osterbrock's book).
Measuring gas density from [SII] 6717/6731 |
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Simplified energy level diagram for the S+ ion.
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Variation of the [SII] 6717 / 6731 line ratio with density (for T = 10,000 K).
Figures from Peterson's AGN book (via Osterbrock's book). |