Abundance Determinations in Emission-Line Objects: The Revised Emission Line Chart

Details Abundance Determinations in Emission-Line Objects: The Revised Emission Line Chart Abundance Determinations in Emission-Line Objects: The Revised Emission Line Chart

Jun 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aj....113.2193k&link_type=abstract

Astronomical Journal v.113, p.2193

Astronomy and Astrophysics

Astronomy

2

Atomic Data, Stars: Emission-Line

Scientific paper

We present here a revision of the Emission Line Chart (Williams, 1995 PASP, 107, 152) which is based upon an extensive grid of photoionization models covering a wide range of hydrogen densities (nH) and stellar temperatures (T*). The results of this grid are used to identify line ratios which are insensitive to conditions in the gas and which are therefore good for deriving abundances. In addition, we classify these ratios according to the region of (nH, T*) parameter space in which they are most useful.

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