Paper:	Bright-Line Diagnostics for Nebular Sulfur Abundance
Volume:	230, Galaxy Disks and Disk Galaxies
Page:	357
Authors:	Oey, M. S.; Shields, J. C.
Abstract:	We show that the bright-line S abundance parameter S23 is sensitive to the nebular ionization parameter because it does not sample the S+3 population. Therefore, we suggest a parameter S234, and show that the intensity of [SIV] 10.5 μm is easily estimated from those of the optical/NIR lines of [OII], [OIII], and [SIII] for Z<0.5 Zsolar. We caution that calibrations of S23 and S234 thus far are reliable only in this regime.

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