An empirical calibration of nebular abundances based on the sulphur emission lines

Details An empirical calibration of nebular abundances based on the sulphur emission lines An empirical calibration of nebular abundances based on the sulphur emission lines

1999-09-29

arxiv.org/abs/astro-ph/9909492v1

Astronomy and Astrophysics

Astrophysics

10 pages, 8 figures. Accepted for publication in MNRAS

Scientific paper

10.1046/j.1365-8711.2000.03117.x

We present an empirical calibration of nebular abundances based on the strong emission lines of [SII] and [SIII] in the red part of the spectrum through the definition of a sulphur abundance parameter S23. This calibration presents two important advantages against the commonly used one based on the optical oxygen lines: it remains single-valued up to abundances close to solar and is rather independent of the degree of ionization of the nebula.

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