Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2012-03-22
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
24 pages, 9 Tables, 13 figures, accepted for publication in MNRAS
Scientific paper
In an attempt to remove the systematic errors which have plagued the calibration of the HII region abundance sequence, we have theoretically modeled the extragalactic HII region sequence. We then used the theoretical spectra so generated in a double blind experiment to recover the chemical abundances using both the classical electron temperature + ionization correction factor technique, and the technique which depends on the use of strong emission lines (SELs) in the nebular spectrum to estimate the abundance of oxygen. We find a number of systematic trends, and we provide correction formulae which should remove systematic errors in the electron temperature + ionization correction factor technique. We also provide a critical evaluation of the various semi-empirical SEL techniques. Finally, we offer a scheme which should help to eliminate systematic errors in the SEL-derived chemical abundance scale for extragalactic HII regions.
Dopita Mike A.
Kewley Lisa J.
Lopez-Sanchez Angel R.
Nicholls David C.
Scharwachter Julia
No associations
LandOfFree
Eliminating Error in the Chemical Abundance Scale for Extragalactic HII Regions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Eliminating Error in the Chemical Abundance Scale for Extragalactic HII Regions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Eliminating Error in the Chemical Abundance Scale for Extragalactic HII Regions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-382006