New empirical metallicity calibrations: Joint analysis of CALIFA data and literature Te-based measurements
Por:
Marino, R. A., Rosales-Ortega, F. F., Sanchez, S. F., Gil de Paz, A., CALIFA Team
Publicada:
1 ene 2014
Categoría:
Astronomy and Astrophysics
Resumen:
In Marino et al. (2013) we provide revisited empirical calibrations for
the oxygen abundances in HII regions based on the O3N2 and N2
indicators. This work is based on the most comprehensive compilation of
both T-e-based and multiple strong-line (ONS-based) ionized-gas
abundance measurements in external galaxies to date in terms of all
statistical significance, quality, and coverage of the parameters space.
Our dataset compiles the T-e-based abundances of 603 HII regions
extracted from the literature but also includes new measurements from
the CALIFA survey. We also present a comparison between our revisited
calibrations with a total of 3423 additional CALIFA HII complexes with
abundances derived using the ONS calibration. The O3N2 and N2 indicators
can be empirically applied to derive oxygen abundances calibrations from
either direct-abundance determinations with random errors of 0.18 and
0.16, respectively, and they show shallower abundance dependencies and
statistically significant offsets compared to the classical calibrations
(as the one of Pettini & Pagel (2004)).
Filiaciones:
Marino, R. A.:
Univ Complutense Madrid, Dept Astrofis & CC Atmosfera, Fac CC Fis, UCM UPM, CEI Campus Moncloa,Avda Complutense S-N, E-28040 Madrid, Spain
Rosales-Ortega, F. F.:
Inst Nacl Astrofis Opt & Electr, Puebla, Mexico
Sanchez, S. F.:
Univ Nacl Autonoma Mexico, Inst Astron, Mexico City, DF, Mexico
Gil de Paz, A.:
Univ Complutense Madrid, Dept Astrofis & CC Atmosfera, Fac CC Fis, UCM UPM, CEI Campus Moncloa,Avda Complutense S-N, E-28040 Madrid, Spain
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